Features of fracture surface in a fully lamellar TiAl-base alloy

被引：28
|
作者：
Ding, Rengen [1 ]
Li, Hangyue [1 ]
Hu, Dawei [1 ]
Martin, Nigel [2 ]
Dixon, Mark [2 ]
Bowen, Paul [1 ]
机构：
[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England
[2] Rolls Royce PLC, Derby DE24 8BJ, England
来源：
INTERMETALLICS | 2015年 / 58卷
基金：
英国工程与自然科学研究理事会;
关键词：
Titanium aluminides; based on TiAl; Microstructure; Ion-beam methods; Electron microscopy; scanning; transmission; FATIGUE; INTERMETALLICS; BEHAVIOR;
D O I：
10.1016/j.intermet.2014.10.020
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The deformation mechanisms associated with different fracture surface appearances of a fatigue tested lamellar TiAl-based alloy have been studied in detail by focussed ion beam and transmission electron microscopy. The results show that linear markings within translamellar plates correspond to twins and/ or slip bands. The markings in interlamellar region are associated with the crack propagation from a lamellar boundary to another. The fan-like region with linear markings belongs to a gamma grain and the markings are related to twins. Intralamellar crack propagation is associated with twin twin interaction within a gamma lamella. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：36 / 42
页数：7
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