Eutectic nucleation and growth in hypoeutectic Al-Si alloys at different strontium levels
Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructur...
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Gespeichert in:
| Autor*in: |
Dahle, A. K. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2001 |
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| Schlagwörter: |
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| Anmerkung: |
© ASM International amp;TMS-The Minerals, Metals and Materials Society 2001 |
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| Übergeordnetes Werk: |
Enthalten in: Metallurgical and materials transactions / A - Springer-Verlag, 1994, 32(2001), 4 vom: Apr., Seite 949-960 |
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| Übergeordnetes Werk: |
volume:32 ; year:2001 ; number:4 ; month:04 ; pages:949-960 |
| Links: |
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| DOI / URN: |
10.1007/s11661-001-0352-y |
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| Katalog-ID: |
OLC2054004766 |
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| 245 | 1 | 0 | |a Eutectic nucleation and growth in hypoeutectic Al-Si alloys at different strontium levels |
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| 520 | |a Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructural evolution of each specimen during solidification was studied by a quenching technique at different temperatures and Sr contents. By comparing the orientation of the aluminum in the eutectic to that of the surrounding primary aluminum dendrites by EBSD, the eutectic formation mechanism could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on Sr level. Three distinctly different eutectic growth modes were found, in isolation or sometimes together, but different for each Sr content. At very low Sr contents, the eutectic nucleated and grew from the primary phase. Increasing the Sr level to between 70 and 110 ppm resulted in nucleation of independent eutectic grains with no relation to the primary dendrites. At a Sr level of 500 ppm, the eutectic again nucleated on and grew from the primary phase while a well-modified eutectic structure was still present. A slight dependency of eutectic growth radially from the mold wall opposite the thermal gradient was observed in all specimens in the early stages of eutectic solidification. | ||
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| 700 | 1 | |a McDonald, S. D. |4 aut | |
| 700 | 1 | |a Zindel, J. W. |4 aut | |
| 700 | 1 | |a Hogan, L. M. |4 aut | |
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10.1007/s11661-001-0352-y doi (DE-627)OLC2054004766 (DE-He213)s11661-001-0352-y-p DE-627 ger DE-627 rakwb eng 670 530 VZ 19,1 ssgn Dahle, A. K. verfasserin aut Eutectic nucleation and growth in hypoeutectic Al-Si alloys at different strontium levels 2001 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © ASM International amp;TMS-The Minerals, Metals and Materials Society 2001 Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructural evolution of each specimen during solidification was studied by a quenching technique at different temperatures and Sr contents. By comparing the orientation of the aluminum in the eutectic to that of the surrounding primary aluminum dendrites by EBSD, the eutectic formation mechanism could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on Sr level. Three distinctly different eutectic growth modes were found, in isolation or sometimes together, but different for each Sr content. At very low Sr contents, the eutectic nucleated and grew from the primary phase. Increasing the Sr level to between 70 and 110 ppm resulted in nucleation of independent eutectic grains with no relation to the primary dendrites. At a Sr level of 500 ppm, the eutectic again nucleated on and grew from the primary phase while a well-modified eutectic structure was still present. A slight dependency of eutectic growth radially from the mold wall opposite the thermal gradient was observed in all specimens in the early stages of eutectic solidification. Material Transaction Primary Dendrite Eutectic Silicon Eutectic Growth Eutectic Solidification Nogita, K. aut McDonald, S. D. aut Zindel, J. W. aut Hogan, L. M. aut Enthalten in Metallurgical and materials transactions / A Springer-Verlag, 1994 32(2001), 4 vom: Apr., Seite 949-960 (DE-627)171342011 (DE-600)1179415-X (DE-576)038876930 1073-5623 nnns volume:32 year:2001 number:4 month:04 pages:949-960 https://doi.org/10.1007/s11661-001-0352-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_2006 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4316 GBV_ILN_4319 GBV_ILN_4700 AR 32 2001 4 04 949-960 |
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10.1007/s11661-001-0352-y doi (DE-627)OLC2054004766 (DE-He213)s11661-001-0352-y-p DE-627 ger DE-627 rakwb eng 670 530 VZ 19,1 ssgn Dahle, A. K. verfasserin aut Eutectic nucleation and growth in hypoeutectic Al-Si alloys at different strontium levels 2001 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © ASM International amp;TMS-The Minerals, Metals and Materials Society 2001 Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructural evolution of each specimen during solidification was studied by a quenching technique at different temperatures and Sr contents. By comparing the orientation of the aluminum in the eutectic to that of the surrounding primary aluminum dendrites by EBSD, the eutectic formation mechanism could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on Sr level. Three distinctly different eutectic growth modes were found, in isolation or sometimes together, but different for each Sr content. At very low Sr contents, the eutectic nucleated and grew from the primary phase. Increasing the Sr level to between 70 and 110 ppm resulted in nucleation of independent eutectic grains with no relation to the primary dendrites. At a Sr level of 500 ppm, the eutectic again nucleated on and grew from the primary phase while a well-modified eutectic structure was still present. A slight dependency of eutectic growth radially from the mold wall opposite the thermal gradient was observed in all specimens in the early stages of eutectic solidification. Material Transaction Primary Dendrite Eutectic Silicon Eutectic Growth Eutectic Solidification Nogita, K. aut McDonald, S. D. aut Zindel, J. W. aut Hogan, L. M. aut Enthalten in Metallurgical and materials transactions / A Springer-Verlag, 1994 32(2001), 4 vom: Apr., Seite 949-960 (DE-627)171342011 (DE-600)1179415-X (DE-576)038876930 1073-5623 nnns volume:32 year:2001 number:4 month:04 pages:949-960 https://doi.org/10.1007/s11661-001-0352-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_2006 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4316 GBV_ILN_4319 GBV_ILN_4700 AR 32 2001 4 04 949-960 |
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10.1007/s11661-001-0352-y doi (DE-627)OLC2054004766 (DE-He213)s11661-001-0352-y-p DE-627 ger DE-627 rakwb eng 670 530 VZ 19,1 ssgn Dahle, A. K. verfasserin aut Eutectic nucleation and growth in hypoeutectic Al-Si alloys at different strontium levels 2001 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © ASM International amp;TMS-The Minerals, Metals and Materials Society 2001 Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructural evolution of each specimen during solidification was studied by a quenching technique at different temperatures and Sr contents. By comparing the orientation of the aluminum in the eutectic to that of the surrounding primary aluminum dendrites by EBSD, the eutectic formation mechanism could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on Sr level. Three distinctly different eutectic growth modes were found, in isolation or sometimes together, but different for each Sr content. At very low Sr contents, the eutectic nucleated and grew from the primary phase. Increasing the Sr level to between 70 and 110 ppm resulted in nucleation of independent eutectic grains with no relation to the primary dendrites. At a Sr level of 500 ppm, the eutectic again nucleated on and grew from the primary phase while a well-modified eutectic structure was still present. A slight dependency of eutectic growth radially from the mold wall opposite the thermal gradient was observed in all specimens in the early stages of eutectic solidification. Material Transaction Primary Dendrite Eutectic Silicon Eutectic Growth Eutectic Solidification Nogita, K. aut McDonald, S. D. aut Zindel, J. W. aut Hogan, L. M. aut Enthalten in Metallurgical and materials transactions / A Springer-Verlag, 1994 32(2001), 4 vom: Apr., Seite 949-960 (DE-627)171342011 (DE-600)1179415-X (DE-576)038876930 1073-5623 nnns volume:32 year:2001 number:4 month:04 pages:949-960 https://doi.org/10.1007/s11661-001-0352-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_2006 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4316 GBV_ILN_4319 GBV_ILN_4700 AR 32 2001 4 04 949-960 |
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10.1007/s11661-001-0352-y doi (DE-627)OLC2054004766 (DE-He213)s11661-001-0352-y-p DE-627 ger DE-627 rakwb eng 670 530 VZ 19,1 ssgn Dahle, A. K. verfasserin aut Eutectic nucleation and growth in hypoeutectic Al-Si alloys at different strontium levels 2001 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © ASM International amp;TMS-The Minerals, Metals and Materials Society 2001 Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructural evolution of each specimen during solidification was studied by a quenching technique at different temperatures and Sr contents. By comparing the orientation of the aluminum in the eutectic to that of the surrounding primary aluminum dendrites by EBSD, the eutectic formation mechanism could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on Sr level. Three distinctly different eutectic growth modes were found, in isolation or sometimes together, but different for each Sr content. At very low Sr contents, the eutectic nucleated and grew from the primary phase. Increasing the Sr level to between 70 and 110 ppm resulted in nucleation of independent eutectic grains with no relation to the primary dendrites. At a Sr level of 500 ppm, the eutectic again nucleated on and grew from the primary phase while a well-modified eutectic structure was still present. A slight dependency of eutectic growth radially from the mold wall opposite the thermal gradient was observed in all specimens in the early stages of eutectic solidification. Material Transaction Primary Dendrite Eutectic Silicon Eutectic Growth Eutectic Solidification Nogita, K. aut McDonald, S. D. aut Zindel, J. W. aut Hogan, L. M. aut Enthalten in Metallurgical and materials transactions / A Springer-Verlag, 1994 32(2001), 4 vom: Apr., Seite 949-960 (DE-627)171342011 (DE-600)1179415-X (DE-576)038876930 1073-5623 nnns volume:32 year:2001 number:4 month:04 pages:949-960 https://doi.org/10.1007/s11661-001-0352-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_2006 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4316 GBV_ILN_4319 GBV_ILN_4700 AR 32 2001 4 04 949-960 |
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10.1007/s11661-001-0352-y doi (DE-627)OLC2054004766 (DE-He213)s11661-001-0352-y-p DE-627 ger DE-627 rakwb eng 670 530 VZ 19,1 ssgn Dahle, A. K. verfasserin aut Eutectic nucleation and growth in hypoeutectic Al-Si alloys at different strontium levels 2001 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © ASM International amp;TMS-The Minerals, Metals and Materials Society 2001 Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructural evolution of each specimen during solidification was studied by a quenching technique at different temperatures and Sr contents. By comparing the orientation of the aluminum in the eutectic to that of the surrounding primary aluminum dendrites by EBSD, the eutectic formation mechanism could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on Sr level. Three distinctly different eutectic growth modes were found, in isolation or sometimes together, but different for each Sr content. At very low Sr contents, the eutectic nucleated and grew from the primary phase. Increasing the Sr level to between 70 and 110 ppm resulted in nucleation of independent eutectic grains with no relation to the primary dendrites. At a Sr level of 500 ppm, the eutectic again nucleated on and grew from the primary phase while a well-modified eutectic structure was still present. A slight dependency of eutectic growth radially from the mold wall opposite the thermal gradient was observed in all specimens in the early stages of eutectic solidification. Material Transaction Primary Dendrite Eutectic Silicon Eutectic Growth Eutectic Solidification Nogita, K. aut McDonald, S. D. aut Zindel, J. W. aut Hogan, L. M. aut Enthalten in Metallurgical and materials transactions / A Springer-Verlag, 1994 32(2001), 4 vom: Apr., Seite 949-960 (DE-627)171342011 (DE-600)1179415-X (DE-576)038876930 1073-5623 nnns volume:32 year:2001 number:4 month:04 pages:949-960 https://doi.org/10.1007/s11661-001-0352-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_2006 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4316 GBV_ILN_4319 GBV_ILN_4700 AR 32 2001 4 04 949-960 |
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eutectic nucleation and growth in hypoeutectic al-si alloys at different strontium levels |
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Eutectic nucleation and growth in hypoeutectic Al-Si alloys at different strontium levels |
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Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructural evolution of each specimen during solidification was studied by a quenching technique at different temperatures and Sr contents. By comparing the orientation of the aluminum in the eutectic to that of the surrounding primary aluminum dendrites by EBSD, the eutectic formation mechanism could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on Sr level. Three distinctly different eutectic growth modes were found, in isolation or sometimes together, but different for each Sr content. At very low Sr contents, the eutectic nucleated and grew from the primary phase. Increasing the Sr level to between 70 and 110 ppm resulted in nucleation of independent eutectic grains with no relation to the primary dendrites. At a Sr level of 500 ppm, the eutectic again nucleated on and grew from the primary phase while a well-modified eutectic structure was still present. A slight dependency of eutectic growth radially from the mold wall opposite the thermal gradient was observed in all specimens in the early stages of eutectic solidification. © ASM International amp;TMS-The Minerals, Metals and Materials Society 2001 |
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Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructural evolution of each specimen during solidification was studied by a quenching technique at different temperatures and Sr contents. By comparing the orientation of the aluminum in the eutectic to that of the surrounding primary aluminum dendrites by EBSD, the eutectic formation mechanism could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on Sr level. Three distinctly different eutectic growth modes were found, in isolation or sometimes together, but different for each Sr content. At very low Sr contents, the eutectic nucleated and grew from the primary phase. Increasing the Sr level to between 70 and 110 ppm resulted in nucleation of independent eutectic grains with no relation to the primary dendrites. At a Sr level of 500 ppm, the eutectic again nucleated on and grew from the primary phase while a well-modified eutectic structure was still present. A slight dependency of eutectic growth radially from the mold wall opposite the thermal gradient was observed in all specimens in the early stages of eutectic solidification. © ASM International amp;TMS-The Minerals, Metals and Materials Society 2001 |
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Abstract The effects of different levels of strontium on nucleation and growth of the eutectic in a commercial hypoeutectic Al-Si foundry alloy have been investigated by optical microscopy and electron backscattering diffraction (EBSD) mapping by scanning electron microscopy (SEM). The microstructural evolution of each specimen during solidification was studied by a quenching technique at different temperatures and Sr contents. By comparing the orientation of the aluminum in the eutectic to that of the surrounding primary aluminum dendrites by EBSD, the eutectic formation mechanism could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on Sr level. Three distinctly different eutectic growth modes were found, in isolation or sometimes together, but different for each Sr content. At very low Sr contents, the eutectic nucleated and grew from the primary phase. Increasing the Sr level to between 70 and 110 ppm resulted in nucleation of independent eutectic grains with no relation to the primary dendrites. At a Sr level of 500 ppm, the eutectic again nucleated on and grew from the primary phase while a well-modified eutectic structure was still present. A slight dependency of eutectic growth radially from the mold wall opposite the thermal gradient was observed in all specimens in the early stages of eutectic solidification. © ASM International amp;TMS-The Minerals, Metals and Materials Society 2001 |
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