摘要
详细研究了ＴＤ２合金（Ｔｉ３Ａｌ基）６５０℃下低循环应变疲劳性能。依据实验数据利用回归分析计算出应变疲劳参数，得出该合金应变疲劳寿命预测公式，并分析了应力—应变行为。实验结果表明Ｔｉ３Ａｌ基合金应变疲劳性能优于ＧＨ３３高温合金，与ＤＺ４高温合金７６０℃水平相当。在循环过程中表现出循环硬化的特征。同时还讨论了ＴＤ２合金疲劳裂纹的起源与扩展。
he Strain-controlled low cycle fatigue properties of TD2 alloy (Ti3Al based alloy) is studied in details. The exponential regression method is used to calculate the strain fatigue parameter. The formula to predict fatigue life of this alloy is established, and the stress-strain behavior is analysed. The experimental results show that the fatigue properties of Ti2Al based alloy at 650℃ is prior to that of GH33 superalloy, and is approximately equal to that of DZ4 superalloy at 760℃. During the cycling Ti3Al based alloy manifests cycle hardening feature. The fatigue crack initiation and propagation of TD2 alloy are discussed.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
1996年第1期17-20,共4页
Rare Metal Materials and Engineering
关键词
应变
疲劳
循环硬化
钛铝合金
Ti_3Al Based Alloy, Strain-Controlled Fatigue, Cycle Hardening
