Low Cycle Fatigue Behavior of Stress-Aged TB3 Alloy

作者：Zhang Lincai^*; Guo Xiaodong; Sun Qiaoyan; Xiao Lin; Sun Jun; Song Zhenya

来源：Rare Metal Materials and Engineering, 2013, 42(10): 2153-2156.

• beta-titanium alloy
• stress aging treatment
• LCF behaviors
• variant selection effect

After solution treatment, Ti-10Mo-8V-1Fe-3.5Al (TB3) alloy was aged at 500 degrees C under a compressive stress. TEM results show that several alpha variants are observed in conventionally aged samples. However, in the stress-aged TB3 samples, most alpha plates are parallel to each other in one beta grain, which indicates a variant selection effect. Two kinds of TB3 samples were selected for low cycle fatigue tests, which had been heat treated to the same strength level. The one was conventionally aged at 500 degrees C for 9 h, and the other was aged at 500 degrees C for 6 h with about 200 MPa compressive stress. Low cycle fatigue (LCF) test results show that the stress-aged TB3 samples exhibit a longer LCF lifetime than the conventionally aged ones.

• 出版日期2013-10
• 单位淮阴工学院; 绍兴文理学院; 西安交通大学