Effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 Cr-1 Mo steel
Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration tec...
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| Autor*in: |
Parthasarathy, T. A. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1984 |
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| Schlagwörter: |
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| Anmerkung: |
© The Metallurgical Society of American Institute of Mining 1984 |
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| Übergeordnetes Werk: |
Enthalten in: Metallurgical transactions. A, Physical metallurgy and materials science - Springer-Verlag, 1975, 15(1984), 11 vom: Nov., Seite 2021-2027 |
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| Übergeordnetes Werk: |
volume:15 ; year:1984 ; number:11 ; month:11 ; pages:2021-2027 |
| Links: |
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| DOI / URN: |
10.1007/BF02646836 |
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OLC2053952474 |
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| 100 | 1 | |a Parthasarathy, T. A. |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 Cr-1 Mo steel |
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| 520 | |a Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration technique was used for the carbon activity. Both the carbon activity and the HA strain rate decreased monotonically with the extent of tempering. A strong correlation existed between carbon activity and the HA strain rate of the samples. Excessive tempering beyond the commercial practice did not eliminate HA, and the carbon activity of a sample tempered for 500 hours at 700 °C was as high as 0.05. The high carbon activity of the excessively tempered samples is explained as due to the effects of low Cr/Fe ratio in $ M_{23} $$ C_{6} $ carbides and to less than the equilibrium Cr content next to the $ M_{23} $$ C_{6} $ resulting from the low diffusivity of Cr in α-iron at the tempering temperature of 700 °C. The methane pressure dependence of the HA strain rates suggests a grain boundary diffusion controlled growth of bubbles for hydrogen pressures up to 20 MPa at 550 °C. | ||
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10.1007/BF02646836 doi (DE-627)OLC2053952474 (DE-He213)BF02646836-p DE-627 ger DE-627 rakwb eng 670 530 VZ Parthasarathy, T. A. verfasserin aut Effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 Cr-1 Mo steel 1984 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Metallurgical Society of American Institute of Mining 1984 Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration technique was used for the carbon activity. Both the carbon activity and the HA strain rate decreased monotonically with the extent of tempering. A strong correlation existed between carbon activity and the HA strain rate of the samples. Excessive tempering beyond the commercial practice did not eliminate HA, and the carbon activity of a sample tempered for 500 hours at 700 °C was as high as 0.05. The high carbon activity of the excessively tempered samples is explained as due to the effects of low Cr/Fe ratio in $ M_{23} $$ C_{6} $ carbides and to less than the equilibrium Cr content next to the $ M_{23} $$ C_{6} $ resulting from the low diffusivity of Cr in α-iron at the tempering temperature of 700 °C. The methane pressure dependence of the HA strain rates suggests a grain boundary diffusion controlled growth of bubbles for hydrogen pressures up to 20 MPa at 550 °C. Carbide Carbon Activity Metallurgical Transaction Hydrogen Pressure Bubble Growth Shewmon, P. G. aut Enthalten in Metallurgical transactions. A, Physical metallurgy and materials science Springer-Verlag, 1975 15(1984), 11 vom: Nov., Seite 2021-2027 (DE-627)129429058 (DE-600)192156-3 (DE-576)01480204X 0026-086X nnns volume:15 year:1984 number:11 month:11 pages:2021-2027 https://doi.org/10.1007/BF02646836 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4313 GBV_ILN_4319 AR 15 1984 11 11 2021-2027 |
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10.1007/BF02646836 doi (DE-627)OLC2053952474 (DE-He213)BF02646836-p DE-627 ger DE-627 rakwb eng 670 530 VZ Parthasarathy, T. A. verfasserin aut Effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 Cr-1 Mo steel 1984 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Metallurgical Society of American Institute of Mining 1984 Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration technique was used for the carbon activity. Both the carbon activity and the HA strain rate decreased monotonically with the extent of tempering. A strong correlation existed between carbon activity and the HA strain rate of the samples. Excessive tempering beyond the commercial practice did not eliminate HA, and the carbon activity of a sample tempered for 500 hours at 700 °C was as high as 0.05. The high carbon activity of the excessively tempered samples is explained as due to the effects of low Cr/Fe ratio in $ M_{23} $$ C_{6} $ carbides and to less than the equilibrium Cr content next to the $ M_{23} $$ C_{6} $ resulting from the low diffusivity of Cr in α-iron at the tempering temperature of 700 °C. The methane pressure dependence of the HA strain rates suggests a grain boundary diffusion controlled growth of bubbles for hydrogen pressures up to 20 MPa at 550 °C. Carbide Carbon Activity Metallurgical Transaction Hydrogen Pressure Bubble Growth Shewmon, P. G. aut Enthalten in Metallurgical transactions. A, Physical metallurgy and materials science Springer-Verlag, 1975 15(1984), 11 vom: Nov., Seite 2021-2027 (DE-627)129429058 (DE-600)192156-3 (DE-576)01480204X 0026-086X nnns volume:15 year:1984 number:11 month:11 pages:2021-2027 https://doi.org/10.1007/BF02646836 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4313 GBV_ILN_4319 AR 15 1984 11 11 2021-2027 |
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10.1007/BF02646836 doi (DE-627)OLC2053952474 (DE-He213)BF02646836-p DE-627 ger DE-627 rakwb eng 670 530 VZ Parthasarathy, T. A. verfasserin aut Effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 Cr-1 Mo steel 1984 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Metallurgical Society of American Institute of Mining 1984 Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration technique was used for the carbon activity. Both the carbon activity and the HA strain rate decreased monotonically with the extent of tempering. A strong correlation existed between carbon activity and the HA strain rate of the samples. Excessive tempering beyond the commercial practice did not eliminate HA, and the carbon activity of a sample tempered for 500 hours at 700 °C was as high as 0.05. The high carbon activity of the excessively tempered samples is explained as due to the effects of low Cr/Fe ratio in $ M_{23} $$ C_{6} $ carbides and to less than the equilibrium Cr content next to the $ M_{23} $$ C_{6} $ resulting from the low diffusivity of Cr in α-iron at the tempering temperature of 700 °C. The methane pressure dependence of the HA strain rates suggests a grain boundary diffusion controlled growth of bubbles for hydrogen pressures up to 20 MPa at 550 °C. Carbide Carbon Activity Metallurgical Transaction Hydrogen Pressure Bubble Growth Shewmon, P. G. aut Enthalten in Metallurgical transactions. A, Physical metallurgy and materials science Springer-Verlag, 1975 15(1984), 11 vom: Nov., Seite 2021-2027 (DE-627)129429058 (DE-600)192156-3 (DE-576)01480204X 0026-086X nnns volume:15 year:1984 number:11 month:11 pages:2021-2027 https://doi.org/10.1007/BF02646836 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4313 GBV_ILN_4319 AR 15 1984 11 11 2021-2027 |
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10.1007/BF02646836 doi (DE-627)OLC2053952474 (DE-He213)BF02646836-p DE-627 ger DE-627 rakwb eng 670 530 VZ Parthasarathy, T. A. verfasserin aut Effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 Cr-1 Mo steel 1984 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Metallurgical Society of American Institute of Mining 1984 Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration technique was used for the carbon activity. Both the carbon activity and the HA strain rate decreased monotonically with the extent of tempering. A strong correlation existed between carbon activity and the HA strain rate of the samples. Excessive tempering beyond the commercial practice did not eliminate HA, and the carbon activity of a sample tempered for 500 hours at 700 °C was as high as 0.05. The high carbon activity of the excessively tempered samples is explained as due to the effects of low Cr/Fe ratio in $ M_{23} $$ C_{6} $ carbides and to less than the equilibrium Cr content next to the $ M_{23} $$ C_{6} $ resulting from the low diffusivity of Cr in α-iron at the tempering temperature of 700 °C. The methane pressure dependence of the HA strain rates suggests a grain boundary diffusion controlled growth of bubbles for hydrogen pressures up to 20 MPa at 550 °C. Carbide Carbon Activity Metallurgical Transaction Hydrogen Pressure Bubble Growth Shewmon, P. G. aut Enthalten in Metallurgical transactions. A, Physical metallurgy and materials science Springer-Verlag, 1975 15(1984), 11 vom: Nov., Seite 2021-2027 (DE-627)129429058 (DE-600)192156-3 (DE-576)01480204X 0026-086X nnns volume:15 year:1984 number:11 month:11 pages:2021-2027 https://doi.org/10.1007/BF02646836 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4313 GBV_ILN_4319 AR 15 1984 11 11 2021-2027 |
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10.1007/BF02646836 doi (DE-627)OLC2053952474 (DE-He213)BF02646836-p DE-627 ger DE-627 rakwb eng 670 530 VZ Parthasarathy, T. A. verfasserin aut Effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 Cr-1 Mo steel 1984 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Metallurgical Society of American Institute of Mining 1984 Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration technique was used for the carbon activity. Both the carbon activity and the HA strain rate decreased monotonically with the extent of tempering. A strong correlation existed between carbon activity and the HA strain rate of the samples. Excessive tempering beyond the commercial practice did not eliminate HA, and the carbon activity of a sample tempered for 500 hours at 700 °C was as high as 0.05. The high carbon activity of the excessively tempered samples is explained as due to the effects of low Cr/Fe ratio in $ M_{23} $$ C_{6} $ carbides and to less than the equilibrium Cr content next to the $ M_{23} $$ C_{6} $ resulting from the low diffusivity of Cr in α-iron at the tempering temperature of 700 °C. The methane pressure dependence of the HA strain rates suggests a grain boundary diffusion controlled growth of bubbles for hydrogen pressures up to 20 MPa at 550 °C. Carbide Carbon Activity Metallurgical Transaction Hydrogen Pressure Bubble Growth Shewmon, P. G. aut Enthalten in Metallurgical transactions. A, Physical metallurgy and materials science Springer-Verlag, 1975 15(1984), 11 vom: Nov., Seite 2021-2027 (DE-627)129429058 (DE-600)192156-3 (DE-576)01480204X 0026-086X nnns volume:15 year:1984 number:11 month:11 pages:2021-2027 https://doi.org/10.1007/BF02646836 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_23 GBV_ILN_30 GBV_ILN_62 GBV_ILN_70 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_2027 GBV_ILN_4035 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4313 GBV_ILN_4319 AR 15 1984 11 11 2021-2027 |
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Effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 Cr-1 Mo steel |
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effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 cr-1 mo steel |
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Effects of tempering on the carbon activity and hydrogen attack kinetics of 2.25 Cr-1 Mo steel |
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Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration technique was used for the carbon activity. Both the carbon activity and the HA strain rate decreased monotonically with the extent of tempering. A strong correlation existed between carbon activity and the HA strain rate of the samples. Excessive tempering beyond the commercial practice did not eliminate HA, and the carbon activity of a sample tempered for 500 hours at 700 °C was as high as 0.05. The high carbon activity of the excessively tempered samples is explained as due to the effects of low Cr/Fe ratio in $ M_{23} $$ C_{6} $ carbides and to less than the equilibrium Cr content next to the $ M_{23} $$ C_{6} $ resulting from the low diffusivity of Cr in α-iron at the tempering temperature of 700 °C. The methane pressure dependence of the HA strain rates suggests a grain boundary diffusion controlled growth of bubbles for hydrogen pressures up to 20 MPa at 550 °C. © The Metallurgical Society of American Institute of Mining 1984 |
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Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration technique was used for the carbon activity. Both the carbon activity and the HA strain rate decreased monotonically with the extent of tempering. A strong correlation existed between carbon activity and the HA strain rate of the samples. Excessive tempering beyond the commercial practice did not eliminate HA, and the carbon activity of a sample tempered for 500 hours at 700 °C was as high as 0.05. The high carbon activity of the excessively tempered samples is explained as due to the effects of low Cr/Fe ratio in $ M_{23} $$ C_{6} $ carbides and to less than the equilibrium Cr content next to the $ M_{23} $$ C_{6} $ resulting from the low diffusivity of Cr in α-iron at the tempering temperature of 700 °C. The methane pressure dependence of the HA strain rates suggests a grain boundary diffusion controlled growth of bubbles for hydrogen pressures up to 20 MPa at 550 °C. © The Metallurgical Society of American Institute of Mining 1984 |
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Abstract The variation with tempering of the carbon activity and the Hydrogen Attack rates of a Q&T 2.25 Cr-1 Mo steel (A542 C13) was studied at 550 °C. A highly sensitive capacitance dilatometer was used to measure the HA strain rates as a function of hydrogen pressure, and an equilibration technique was used for the carbon activity. Both the carbon activity and the HA strain rate decreased monotonically with the extent of tempering. A strong correlation existed between carbon activity and the HA strain rate of the samples. Excessive tempering beyond the commercial practice did not eliminate HA, and the carbon activity of a sample tempered for 500 hours at 700 °C was as high as 0.05. The high carbon activity of the excessively tempered samples is explained as due to the effects of low Cr/Fe ratio in $ M_{23} $$ C_{6} $ carbides and to less than the equilibrium Cr content next to the $ M_{23} $$ C_{6} $ resulting from the low diffusivity of Cr in α-iron at the tempering temperature of 700 °C. The methane pressure dependence of the HA strain rates suggests a grain boundary diffusion controlled growth of bubbles for hydrogen pressures up to 20 MPa at 550 °C. © The Metallurgical Society of American Institute of Mining 1984 |
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