Aging Procedure and Its Hardness Change from Single β-Ti Phase to α+Ti2Co Dual Phase of Alloy Ti-12Co-5Al

Hu Xiaohua; Chen Guoliang; Yang Wangyue; Xu Jialong

doi:10.13374/j.issn1001-053x.1998.06.007

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Hu Xiaohua, Chen Guoliang, Yang Wangyue, Xu Jialong. Aging Procedure and Its Hardness Change from Single β-Ti Phase to α+Ti2Co Dual Phase of Alloy Ti-12Co-5Al[J]. Chinese Journal of Engineering, 1998, 20(6): 536-540. doi: 10.13374/j.issn1001-053x.1998.06.007

Citation:

Hu Xiaohua, Chen Guoliang, Yang Wangyue, Xu Jialong. Aging Procedure and Its Hardness Change from Single β-Ti Phase to α+Ti₂Co Dual Phase of Alloy Ti-12Co-5Al[J]. Chinese Journal of Engineering, 1998, 20(6): 536-540. doi: 10.13374/j.issn1001-053x.1998.06.007

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Aging Procedure and Its Hardness Change from Single β-Ti Phase to α+Ti₂Co Dual Phase of Alloy Ti-12Co-5Al

doi: 10.13374/j.issn1001-053x.1998.06.007

1. State Key Lab for Advanced Metals and Materials, UST Beijing, Beijing 100083, China;
2. Shanghai Research Institute of Iron and Steel

Received Date: 1997-12-25
Available Online: 2021-08-27

Abstract

Abstract

Ageing process and its hardness change from β to α+Ti₂Co of alloy Ti-12Co-5Al were investigated. At 450℃,the amount of transformation increases with ageing time and the boundary between the transformation product and the matrix changes from coherent to incoherent. The maximum hardness is achieved at around 320 minutes. With the same ageing time of 20 minutes, the same thing happens as above with increasing temperatures and the hardness peaks at around 600℃.The addition of element aluminum slows down the kinetics of ageing transformation in addition to its strengthening effect.
- Ti-12Co-5Al alloy,
- β-Ti ageing transformation to α+Ti₂Co,
- microstructure,
- hardness change