摘要
采用TEM技术研究了具有不同热处理组织的Ti-25V-15Cr-2Al-2Mo-0.2C合金在540℃,250 MPa,100 h蠕变作用后的变形结构。结果表明:位错环组是合金蠕变变形结构中的典型位错组态;合金的蠕变抗力随β基体上弥散分布的第二相析出数量的增加而提高。添加微量能提高蠕变抗力的合金元素,如Si元素等,是改善合金蠕变性能的可行途径。
The deformation structure in Ti-25V-15Cr-2Al-2Mo-0.2C alloy with different heat treatment microstructures after creep at 540°C, 250 MPa for 100 h has been investigated by transmission electron microscopy (TEM) technology. The results show that dislocation loop groups are the typical dislocation morphologies of the creep deformation structure in the alloy. The creep resistance of the alloy increases with the number of second phase precipitates (such as carbide particles and a precipitation) uniformly distributed in the β matrix. The addition of other alloy elements that can increase creep resistance, such as Si, is a feasible method to improve the creep property of the alloy.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2004年第5期498-501,共4页
Rare Metal Materials and Engineering
基金
中英国际合作项目(2000~2002)
关键词
阻燃钛合金
第二相
蠕变抗力
变形结构
位错环组
non-burning titanium alloy
second phase
creep resistance
deformation structure
dislocation loop group