Effect of Ultrasounds Treatment on Alloys for Semisolid Application
Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the...
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| Autor*in: |
Pola, Annalisa [verfasserIn] |
|---|
| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
s.l. Stafa-Zurich, Switzerland: 2008 |
|---|
| Anmerkung: |
https://getinfo.de/app/details?id=transtech:doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.481 |
|---|---|
| Umfang: |
Online-Ressource (6 pages) |
| Reproduktion: |
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008 |
|---|---|
| Übergeordnetes Werk: |
In: Solid state phenomena - Uetikon : Trans Tech Publ., 1988, Vol. 141-143 (July 2008), p. 481-486 |
| Übergeordnetes Werk: |
volume:141-143 ; year:2008 ; pages:481-486 |
| Links: |
|---|
| DOI / URN: |
10.4028/www.scientific.net/SSP.141-143.481 |
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| 520 | |a Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the pin.As known, ultrasounds are mechanical waves which, when applied to liquid metals, increase thenumber of solidification nuclei, so that the cast products show superior mechanical performances, as aconsequence of the finer grain structure.In this paper the use of ultrasound waves applied to different alloys during solidification was studiedin order to obtain feedstock for semisolid die-casting application.A dedicated ultrasound power unit, together with a proper sonicator pin, was designed andmanufactured by the authors and, subsequently, the effect of the ultrasonic treatment on themicrostructure of A356 aluminum alloy and ZA27 zinc alloy was investigated.All the produced samples were characterized by metallographic analyses to measure the globule sizeand shape factor, which are main criteria for thixo-microstructure assessment.The results were compared to those obtained with traditional mechanical stirring, showing the highercapability of ultrasound treatment in producing better semisolid microstructure.An optimized combination of process parameters seems to be necessary to get a reasonablethixotropic structure in treating ZA27 alloy.Less severe production conditions are needed in the case of aluminum alloy, revealing the potentialityof ultrasounds as an alternative treatment to traditional mechanical stirring, with the further advantageof alloy degassing and grain refinement, without the use of expensive addictions (TiB2).Trials were finally performed on a continuous casting pilot plant in combination with electromagneticstirring to produce semisolid billets | ||
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10.4028/www.scientific.net/SSP.141-143.481 doi (DE-627)NLEJ238327744 DE-627 ger DE-627 rakwb eng Pola, Annalisa verfasserin aut Effect of Ultrasounds Treatment on Alloys for Semisolid Application s.l. Stafa-Zurich, Switzerland 2008 Online-Ressource (6 pages) nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier https://getinfo.de/app/details?id=transtech:doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.481 Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the pin.As known, ultrasounds are mechanical waves which, when applied to liquid metals, increase thenumber of solidification nuclei, so that the cast products show superior mechanical performances, as aconsequence of the finer grain structure.In this paper the use of ultrasound waves applied to different alloys during solidification was studiedin order to obtain feedstock for semisolid die-casting application.A dedicated ultrasound power unit, together with a proper sonicator pin, was designed andmanufactured by the authors and, subsequently, the effect of the ultrasonic treatment on themicrostructure of A356 aluminum alloy and ZA27 zinc alloy was investigated.All the produced samples were characterized by metallographic analyses to measure the globule sizeand shape factor, which are main criteria for thixo-microstructure assessment.The results were compared to those obtained with traditional mechanical stirring, showing the highercapability of ultrasound treatment in producing better semisolid microstructure.An optimized combination of process parameters seems to be necessary to get a reasonablethixotropic structure in treating ZA27 alloy.Less severe production conditions are needed in the case of aluminum alloy, revealing the potentialityof ultrasounds as an alternative treatment to traditional mechanical stirring, with the further advantageof alloy degassing and grain refinement, without the use of expensive addictions (TiB2).Trials were finally performed on a continuous casting pilot plant in combination with electromagneticstirring to produce semisolid billets Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008 Arrighini, Alberto oth Roberti, Roberto oth In Solid state phenomena Uetikon : Trans Tech Publ., 1988 Vol. 141-143 (July 2008), p. 481-486 Online-Ressource (DE-627)NLEJ237794926 (DE-600)2051138-3 1662-9779 nnns volume:141-143 year:2008 pages:481-486 https://www.tib.eu/de/openurl/search/?pid=doi:10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext https://doi.org//10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-SNT GBV_NL_ARTICLE AR 141-143 2008 481-486 Vol. 141-143 (July 2008), p. 481-486 |
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10.4028/www.scientific.net/SSP.141-143.481 doi (DE-627)NLEJ238327744 DE-627 ger DE-627 rakwb eng Pola, Annalisa verfasserin aut Effect of Ultrasounds Treatment on Alloys for Semisolid Application s.l. Stafa-Zurich, Switzerland 2008 Online-Ressource (6 pages) nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier https://getinfo.de/app/details?id=transtech:doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.481 Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the pin.As known, ultrasounds are mechanical waves which, when applied to liquid metals, increase thenumber of solidification nuclei, so that the cast products show superior mechanical performances, as aconsequence of the finer grain structure.In this paper the use of ultrasound waves applied to different alloys during solidification was studiedin order to obtain feedstock for semisolid die-casting application.A dedicated ultrasound power unit, together with a proper sonicator pin, was designed andmanufactured by the authors and, subsequently, the effect of the ultrasonic treatment on themicrostructure of A356 aluminum alloy and ZA27 zinc alloy was investigated.All the produced samples were characterized by metallographic analyses to measure the globule sizeand shape factor, which are main criteria for thixo-microstructure assessment.The results were compared to those obtained with traditional mechanical stirring, showing the highercapability of ultrasound treatment in producing better semisolid microstructure.An optimized combination of process parameters seems to be necessary to get a reasonablethixotropic structure in treating ZA27 alloy.Less severe production conditions are needed in the case of aluminum alloy, revealing the potentialityof ultrasounds as an alternative treatment to traditional mechanical stirring, with the further advantageof alloy degassing and grain refinement, without the use of expensive addictions (TiB2).Trials were finally performed on a continuous casting pilot plant in combination with electromagneticstirring to produce semisolid billets Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008 Arrighini, Alberto oth Roberti, Roberto oth In Solid state phenomena Uetikon : Trans Tech Publ., 1988 Vol. 141-143 (July 2008), p. 481-486 Online-Ressource (DE-627)NLEJ237794926 (DE-600)2051138-3 1662-9779 nnns volume:141-143 year:2008 pages:481-486 https://www.tib.eu/de/openurl/search/?pid=doi:10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext https://doi.org//10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-SNT GBV_NL_ARTICLE AR 141-143 2008 481-486 Vol. 141-143 (July 2008), p. 481-486 |
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10.4028/www.scientific.net/SSP.141-143.481 doi (DE-627)NLEJ238327744 DE-627 ger DE-627 rakwb eng Pola, Annalisa verfasserin aut Effect of Ultrasounds Treatment on Alloys for Semisolid Application s.l. Stafa-Zurich, Switzerland 2008 Online-Ressource (6 pages) nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier https://getinfo.de/app/details?id=transtech:doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.481 Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the pin.As known, ultrasounds are mechanical waves which, when applied to liquid metals, increase thenumber of solidification nuclei, so that the cast products show superior mechanical performances, as aconsequence of the finer grain structure.In this paper the use of ultrasound waves applied to different alloys during solidification was studiedin order to obtain feedstock for semisolid die-casting application.A dedicated ultrasound power unit, together with a proper sonicator pin, was designed andmanufactured by the authors and, subsequently, the effect of the ultrasonic treatment on themicrostructure of A356 aluminum alloy and ZA27 zinc alloy was investigated.All the produced samples were characterized by metallographic analyses to measure the globule sizeand shape factor, which are main criteria for thixo-microstructure assessment.The results were compared to those obtained with traditional mechanical stirring, showing the highercapability of ultrasound treatment in producing better semisolid microstructure.An optimized combination of process parameters seems to be necessary to get a reasonablethixotropic structure in treating ZA27 alloy.Less severe production conditions are needed in the case of aluminum alloy, revealing the potentialityof ultrasounds as an alternative treatment to traditional mechanical stirring, with the further advantageof alloy degassing and grain refinement, without the use of expensive addictions (TiB2).Trials were finally performed on a continuous casting pilot plant in combination with electromagneticstirring to produce semisolid billets Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008 Arrighini, Alberto oth Roberti, Roberto oth In Solid state phenomena Uetikon : Trans Tech Publ., 1988 Vol. 141-143 (July 2008), p. 481-486 Online-Ressource (DE-627)NLEJ237794926 (DE-600)2051138-3 1662-9779 nnns volume:141-143 year:2008 pages:481-486 https://www.tib.eu/de/openurl/search/?pid=doi:10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext https://doi.org//10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-SNT GBV_NL_ARTICLE AR 141-143 2008 481-486 Vol. 141-143 (July 2008), p. 481-486 |
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10.4028/www.scientific.net/SSP.141-143.481 doi (DE-627)NLEJ238327744 DE-627 ger DE-627 rakwb eng Pola, Annalisa verfasserin aut Effect of Ultrasounds Treatment on Alloys for Semisolid Application s.l. Stafa-Zurich, Switzerland 2008 Online-Ressource (6 pages) nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier https://getinfo.de/app/details?id=transtech:doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.481 Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the pin.As known, ultrasounds are mechanical waves which, when applied to liquid metals, increase thenumber of solidification nuclei, so that the cast products show superior mechanical performances, as aconsequence of the finer grain structure.In this paper the use of ultrasound waves applied to different alloys during solidification was studiedin order to obtain feedstock for semisolid die-casting application.A dedicated ultrasound power unit, together with a proper sonicator pin, was designed andmanufactured by the authors and, subsequently, the effect of the ultrasonic treatment on themicrostructure of A356 aluminum alloy and ZA27 zinc alloy was investigated.All the produced samples were characterized by metallographic analyses to measure the globule sizeand shape factor, which are main criteria for thixo-microstructure assessment.The results were compared to those obtained with traditional mechanical stirring, showing the highercapability of ultrasound treatment in producing better semisolid microstructure.An optimized combination of process parameters seems to be necessary to get a reasonablethixotropic structure in treating ZA27 alloy.Less severe production conditions are needed in the case of aluminum alloy, revealing the potentialityof ultrasounds as an alternative treatment to traditional mechanical stirring, with the further advantageof alloy degassing and grain refinement, without the use of expensive addictions (TiB2).Trials were finally performed on a continuous casting pilot plant in combination with electromagneticstirring to produce semisolid billets Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008 Arrighini, Alberto oth Roberti, Roberto oth In Solid state phenomena Uetikon : Trans Tech Publ., 1988 Vol. 141-143 (July 2008), p. 481-486 Online-Ressource (DE-627)NLEJ237794926 (DE-600)2051138-3 1662-9779 nnns volume:141-143 year:2008 pages:481-486 https://www.tib.eu/de/openurl/search/?pid=doi:10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext https://doi.org//10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-SNT GBV_NL_ARTICLE AR 141-143 2008 481-486 Vol. 141-143 (July 2008), p. 481-486 |
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10.4028/www.scientific.net/SSP.141-143.481 doi (DE-627)NLEJ238327744 DE-627 ger DE-627 rakwb eng Pola, Annalisa verfasserin aut Effect of Ultrasounds Treatment on Alloys for Semisolid Application s.l. Stafa-Zurich, Switzerland 2008 Online-Ressource (6 pages) nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier https://getinfo.de/app/details?id=transtech:doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.481 Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the pin.As known, ultrasounds are mechanical waves which, when applied to liquid metals, increase thenumber of solidification nuclei, so that the cast products show superior mechanical performances, as aconsequence of the finer grain structure.In this paper the use of ultrasound waves applied to different alloys during solidification was studiedin order to obtain feedstock for semisolid die-casting application.A dedicated ultrasound power unit, together with a proper sonicator pin, was designed andmanufactured by the authors and, subsequently, the effect of the ultrasonic treatment on themicrostructure of A356 aluminum alloy and ZA27 zinc alloy was investigated.All the produced samples were characterized by metallographic analyses to measure the globule sizeand shape factor, which are main criteria for thixo-microstructure assessment.The results were compared to those obtained with traditional mechanical stirring, showing the highercapability of ultrasound treatment in producing better semisolid microstructure.An optimized combination of process parameters seems to be necessary to get a reasonablethixotropic structure in treating ZA27 alloy.Less severe production conditions are needed in the case of aluminum alloy, revealing the potentialityof ultrasounds as an alternative treatment to traditional mechanical stirring, with the further advantageof alloy degassing and grain refinement, without the use of expensive addictions (TiB2).Trials were finally performed on a continuous casting pilot plant in combination with electromagneticstirring to produce semisolid billets Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008 Arrighini, Alberto oth Roberti, Roberto oth In Solid state phenomena Uetikon : Trans Tech Publ., 1988 Vol. 141-143 (July 2008), p. 481-486 Online-Ressource (DE-627)NLEJ237794926 (DE-600)2051138-3 1662-9779 nnns volume:141-143 year:2008 pages:481-486 https://www.tib.eu/de/openurl/search/?pid=doi:10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext https://doi.org//10.4028/www.scientific.net/SSP.141-143.481 text/html Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-SNT GBV_NL_ARTICLE AR 141-143 2008 481-486 Vol. 141-143 (July 2008), p. 481-486 |
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Effect of Ultrasounds Treatment on Alloys for Semisolid Application |
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Effect of Ultrasounds Treatment on Alloys for Semisolid Application |
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Pola, Annalisa |
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Solid state phenomena |
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Solid state phenomena |
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2008 |
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481 |
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Pola, Annalisa |
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141-143 |
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Online-Ressource (6 pages) |
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Elektronische Aufsätze |
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Pola, Annalisa |
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10.4028/www.scientific.net/SSP.141-143.481 |
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effect of ultrasounds treatment on alloys for semisolid application |
| title_auth |
Effect of Ultrasounds Treatment on Alloys for Semisolid Application |
| abstract |
Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the pin.As known, ultrasounds are mechanical waves which, when applied to liquid metals, increase thenumber of solidification nuclei, so that the cast products show superior mechanical performances, as aconsequence of the finer grain structure.In this paper the use of ultrasound waves applied to different alloys during solidification was studiedin order to obtain feedstock for semisolid die-casting application.A dedicated ultrasound power unit, together with a proper sonicator pin, was designed andmanufactured by the authors and, subsequently, the effect of the ultrasonic treatment on themicrostructure of A356 aluminum alloy and ZA27 zinc alloy was investigated.All the produced samples were characterized by metallographic analyses to measure the globule sizeand shape factor, which are main criteria for thixo-microstructure assessment.The results were compared to those obtained with traditional mechanical stirring, showing the highercapability of ultrasound treatment in producing better semisolid microstructure.An optimized combination of process parameters seems to be necessary to get a reasonablethixotropic structure in treating ZA27 alloy.Less severe production conditions are needed in the case of aluminum alloy, revealing the potentialityof ultrasounds as an alternative treatment to traditional mechanical stirring, with the further advantageof alloy degassing and grain refinement, without the use of expensive addictions (TiB2).Trials were finally performed on a continuous casting pilot plant in combination with electromagneticstirring to produce semisolid billets https://getinfo.de/app/details?id=transtech:doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.481 |
| abstractGer |
Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the pin.As known, ultrasounds are mechanical waves which, when applied to liquid metals, increase thenumber of solidification nuclei, so that the cast products show superior mechanical performances, as aconsequence of the finer grain structure.In this paper the use of ultrasound waves applied to different alloys during solidification was studiedin order to obtain feedstock for semisolid die-casting application.A dedicated ultrasound power unit, together with a proper sonicator pin, was designed andmanufactured by the authors and, subsequently, the effect of the ultrasonic treatment on themicrostructure of A356 aluminum alloy and ZA27 zinc alloy was investigated.All the produced samples were characterized by metallographic analyses to measure the globule sizeand shape factor, which are main criteria for thixo-microstructure assessment.The results were compared to those obtained with traditional mechanical stirring, showing the highercapability of ultrasound treatment in producing better semisolid microstructure.An optimized combination of process parameters seems to be necessary to get a reasonablethixotropic structure in treating ZA27 alloy.Less severe production conditions are needed in the case of aluminum alloy, revealing the potentialityof ultrasounds as an alternative treatment to traditional mechanical stirring, with the further advantageof alloy degassing and grain refinement, without the use of expensive addictions (TiB2).Trials were finally performed on a continuous casting pilot plant in combination with electromagneticstirring to produce semisolid billets https://getinfo.de/app/details?id=transtech:doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.481 |
| abstract_unstemmed |
Semisolid metallic alloys are commercially produced by means of mechanical orelectromagnetic stirring. Among the mechanical devices, the rotating pin immersed in a solidifyingalloy seems to be easier to manage in industrial practice although it can induce some porosity,depending on the shape of the pin.As known, ultrasounds are mechanical waves which, when applied to liquid metals, increase thenumber of solidification nuclei, so that the cast products show superior mechanical performances, as aconsequence of the finer grain structure.In this paper the use of ultrasound waves applied to different alloys during solidification was studiedin order to obtain feedstock for semisolid die-casting application.A dedicated ultrasound power unit, together with a proper sonicator pin, was designed andmanufactured by the authors and, subsequently, the effect of the ultrasonic treatment on themicrostructure of A356 aluminum alloy and ZA27 zinc alloy was investigated.All the produced samples were characterized by metallographic analyses to measure the globule sizeand shape factor, which are main criteria for thixo-microstructure assessment.The results were compared to those obtained with traditional mechanical stirring, showing the highercapability of ultrasound treatment in producing better semisolid microstructure.An optimized combination of process parameters seems to be necessary to get a reasonablethixotropic structure in treating ZA27 alloy.Less severe production conditions are needed in the case of aluminum alloy, revealing the potentialityof ultrasounds as an alternative treatment to traditional mechanical stirring, with the further advantageof alloy degassing and grain refinement, without the use of expensive addictions (TiB2).Trials were finally performed on a continuous casting pilot plant in combination with electromagneticstirring to produce semisolid billets https://getinfo.de/app/details?id=transtech:doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.481 |
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Effect of Ultrasounds Treatment on Alloys for Semisolid Application |
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https://www.tib.eu/de/openurl/search/?pid=doi:10.4028/www.scientific.net/SSP.141-143.481 https://doi.org//10.4028/www.scientific.net/SSP.141-143.481 |
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Arrighini, Alberto Roberti, Roberto |
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