Isothermal and thermomechanical fatigue of titanium alloys

被引：11
|
作者：
Heckel, Thomas K. [1 ]
Christ, Hans-Juergen [1 ]
机构：
[1] Univ Siegen, Inst Werkstofftech, D-57068 Siegen, Germany
来源：
FATIGUE 2010 | 2010年 / 2卷 / 01期
关键词：
Near-alpha titanium; gamma-titanium aluminide; Basquin-Coffin-Manson relationship; environmental contribution; LOW-CYCLE FATIGUE; GAMMA-TIAL-ALLOY; ELECTRON-MICROSCOPE; ALUMINIDE ALLOY; BEHAVIOR; TEMPERATURE; FRACTURE;
D O I：
10.1016/j.proeng.2010.03.091
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
LCF and TMF tests were conducted on Ti6242 and on the intermetallic TiAl alloy TNB-V2 between 350-650 degrees C and 550-850 degrees C, respectively. A continuous life reduction of Ti6242 was observed with increasing temperature. On contrary, temperature does not have a systematic influence on life for TNB-V2. Life description based on Basquin-Coffin-Manson illustrates the small contribution of plastic strain to fatigue life of TNB-V2. The transition cycle number, which represents the transition from plastic strain to stress controlled fatigue life, was found to be 4 for TNB-V2 at 550 degrees C, while it is 409 for Ti6242. Tests in vacuum demonstrated a strong influence of the environment. TMF tests showed that TNB-V2 is very susceptible to out-of-phase loading. (C) 2010 Published by Elsevier Ltd.
引用
收藏
页码：845 / 854
页数：10
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