Low cycle fatigue, creep and creep-fatigue interaction behavior of a TiAl alloy at high temperatures

被引：26
|
作者：
Dong, Chengli [1 ]
Yu, Huichen [1 ]
Jiao, Zehui [1 ]
Kong, Fantao [2 ]
Chen, Yuyong [2 ]
机构：
[1] AECC Beijing Inst Aeronaut Mat, Beijing Key Lab Aeronaut Mat Testing & Evaluat, Aviat Key Lab Sci & Technol Aeronaut Mat Testing, Sci & Technol Adv High Temp Struct Mat Lab, Beijing 100095, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
来源：
SCRIPTA MATERIALIA | 2018年 / 144卷
关键词：
TiAl alloy; Low cycle fatigue (LCF); Creep-fatigue interaction (CFI); Dwell time; Life prediction; 750; DEGREES-C; HIGH-NB; DWELL TIME; CRACK INITIATION; MICROSTRUCTURE; PROPAGATION; LIFE;
D O I：
10.1016/j.scriptamat.2017.09.016
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The creep-fatigue interaction (CFI) tests of a TiAl alloy were carried out at 750 degrees C and 800 degrees C in air to investigate the effect of dwell time on fatigue life. The low cycle fatigue (LCF) and creep tests were also conducted for comparison. The life to failure decreased with increasing dwell time and decreased with increasing minimum strain rate. Two life models based on dwell time and minimum strain rate were proposed to predict LCF, creep and CFI life, and the predicted life of both life models agrees very well with the tested life of the alloy at high temperatures. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：60 / 63
页数：4
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