Primary Creep and Steady-State Creep of Ti65 Alloy

被引：0
|
作者：
Yue K. [1 ,2 ]
Liu J. [1 ]
Yang R. [1 ]
Wang Q. [1 ]
机构：
[1] Institute of Metal Research, Chinese Academy of Sciences, Shenyang
[2] School of Materials Science and Engineering, University of Science and Technology of China, Shenyang
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2020年 / 34卷 / 02期
关键词：
Creep deformation; Creep test; Microstructure and properties of materials; Ti65; alloy;
D O I：
10.11901/1005.3093.2019.286
中图分类号：
学科分类号：
摘要：
The creep deformation behavior and relevant microscopic deformation mechanisms of Ti65 alloy were investigated via tensile creep test by stresses in the range of 120~160 MPa at 600~650℃and TEM observation. The results show that the primary creep deformation mechanism is dominated by the process of climbing-controlled dislocations crossing the α2 phases and the creep mechanism in the steady-state creep stage is dominated by the process of diffusion-controlled dislocation climbing at the α/β interfaces, and the stress index of steady-state creep stage varies from 5 to 7. The hindering of dislocation motions by α2 phases is the dominating process to strengthen the high-temperature creep resistance of Ti65 alloy during the primary creep stage. The silicide precipitates distributed along α/β phase boundaries, impede the dislocation motions and restrict the grain boundary slip (GBS), which is the dominating strengthening mechanism during the steady-state creep stage. © All right reserved.
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页码：151 / 160
页数：9
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