The effects of microstructure on creep behaviour-A study through synchrotron X-ray tomography

被引：10
|
作者：
Cheong, Ke-Shen [1 ]
Stevens, Kevin J. [1 ]
Suzuki, Y. [2 ]
Uesugi, K. [2 ]
Takeuchi, A. [2 ]
机构：
[1] Quest Reliabil Ltd, Lower Hutt 5045, New Zealand
[2] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 513-14卷
关键词：
Creep; Tomography; Austenitic steels; Microstructure; Synchrotron radiation; ALLOY; FRACTURE; CAST;
D O I：
10.1016/j.msea.2009.02.021
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A preliminary study has been carried out to investigate the influence of microstructure on creep behaviour using an Fe-Ni-Cr steel alloy as a model material. Creep rupture tests and synchrotron X-ray tomography were performed on as-cast (AC) and ex-service (ES) specimens. The results indicate that the combination of larger cavity volume and lower ductility in the AC specimen was attributed to initial microstructural differences in terms of carbide size and distribution. The location, orientation and shape of the voids were also considered to be important microstructural features as voids on grain boundaries were seen to have coalesced preferentially along the plane normal to the loading axis to form 'wedge' shaped voids. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：222 / 227
页数：6
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