In situ observation of high temperature tensile deformation and low cycle fatigue response in a nickel-base superalloy

被引：13
|
作者：
Lu, Xudong [1 ]
Du, Jinhui [1 ]
Deng, Qun [1 ]
机构：
[1] Cent Iron & Steel Res Inst, Dept Superalloy, Beijing 100081, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 588卷
关键词：
In-situ; Low cycle fatigue; Crack propagation; Slip bands; CRACK GROWTH-BEHAVIOR; ELEVATED-TEMPERATURES; INCONEL; 718; ALLOY; SEM; PHASE; PRECIPITATION; ENVIRONMENT; DAMAGE; IN718;
D O I：
10.1016/j.msea.2013.08.060
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
High temperature tension and low cycle fatigue experiments of IN718 alloy have been performed in the electro-hydraulic servo system with scanning electron microscope at 455 degrees C. Fatigue crack initiation and propagation process are investigated in situ. Results show that the carbide and twin grain are the crack source of the low cycle fatigue of IN718 alloy, and the low cycle fatigue life of the alloy increases with the decrease in grain size. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：411 / 415
页数：5
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