Effects of Withdrawing Rate on the Growth Orientation of Directionally Solidified Co-Al-W Superalloys AITranslate
Abstract AITranslate
Co-9 Al-9 W-0.1 Balloy was directionally solidified at different withdrawing rate,and its solidified microstructure was observed and the grain growth orientation was investigated by electron backscatter diffraction.With the withdrawing rate of 20 mm/h and 60 mm/h,the solid-liquid interface fronts are plane and cellular,respectively,and the growth orientation is both close to the〈101〉direction.With withdrawing rate increasing,the solid-liquid interface front changes into dendrites.When the withdrawing rate is 180 mm/h,the growth orientation is〈013〉direction.With the withdrawing rate of 360 mm/h,the grain growth orientation deviated from 〈101〉by about 30°.Co-9 Al-9 Walloy has a preferred orientation of〈001〉after a period of competition growth during directional solidification at 180 mm/h withdrawing rate.Borides can strengthen grain boundaries and the absence of borides results in the poorer creep strength of Co-9 Al-9 W alloy,compared with Co-9 Al-9 W-0.1 Balloy directionally solidified at the same withdrawing rate.Co-9 Al-9 W-0.1 B alloy directionally solidified at 180 mm/h withdrawing rate has columnar grains and higher creep strength than Co-9 Al-9 W-0.1 Balloy with equiaxed grains.
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Basic Information:
DOI：
Chinese Library Classification Number:TG132.32[一般工业技术—材料科学与工程]
Citation Information:
Co-9 Al-9 W-0.1 Balloy was directionally solidified at different withdrawing rate,and its solidified microstructure was observed and the grain growth orientation was investigated by electron backscatter diffraction.With the withdrawing rate of 20 mm/h and 60 mm/h,the solid-liquid interface fronts are plane and cellular,respectively,and the growth orientation is both close to the〈101〉direction.With withdrawing rate increasing,the solid-liquid interface front changes into dendrites.When the withdrawing rate is 180 mm/h,the growth orientation is〈013〉direction.With the withdrawing rate of 360 mm/h,the grain growth orientation deviated from 〈101〉by about 30°.Co-9 Al-9 Walloy has a preferred orientation of〈001〉after a period of competition growth during directional solidification at 180 mm/h withdrawing rate.Borides can strengthen grain boundaries and the absence of borides results in the poorer creep strength of Co-9 Al-9 W alloy,compared with Co-9 Al-9 W-0.1 Balloy directionally solidified at the same withdrawing rate.Co-9 Al-9 W-0.1 B alloy directionally solidified at 180 mm/h withdrawing rate has columnar grains and higher creep strength than Co-9 Al-9 W-0.1 Balloy with equiaxed grains.
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| GB/T 7714-2015 | [1] LI Yu-zhi, YAO Ze-kun. Effects of Withdrawing Rate on the Growth Orientation of Directionally Solidified Co-Al-W Superalloys[J]. Rare Metals and Cemented Carbides, 2018(1): 21-26. |
| MLA | [1] LI Yu-zhi, and YAO Ze-kun. "Effects of Withdrawing Rate on the Growth Orientation of Directionally Solidified Co-Al-W Superalloys." Rare Metals and Cemented Carbides, no. 1, 2018, pp. 21-26. |
| APA | [1] LI Yu-zhi, & YAO Ze-kun. (2018). Effects of Withdrawing Rate on the Growth Orientation of Directionally Solidified Co-Al-W Superalloys. Rare Metals and Cemented Carbides(1), 21-26. |
| IEEE | [1] LI Yu-zhi and YAO Ze-kun, "Effects of Withdrawing Rate on the Growth Orientation of Directionally Solidified Co-Al-W Superalloys," Rare Metals and Cemented Carbides, no. 1, pp. 21-26, 2018. keywords: {superalloy;Co- 9 Al- 9W-0. 1B;directional solidification;preferred orientation;withdrawing rate;microstructure;electron backscatter diffraction} |