Effect of grain boundary orientation and cyclic load on creep and fracture behaviour in directionally solidified nickel base superalloy
文献类型:期刊论文
作者 | C. Yuan ; J. T. Guo ; H. C. Yang |
刊名 | Materials Science and Technology
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出版日期 | 2002 |
卷号 | 18期号:1页码:73-80 |
关键词 | alloy fatigue mechanism in738lc stress |
ISSN号 | 0267-0836 |
中文摘要 | The effects of grain boundary orientation and cyclic load on the creep and fracture behaviour of directionally solidified superalloy DZ17G have been investigated. The results show that grain boundary orientation has no effect on the creep deformation mechanism, but has a marked effect on the fracture mechanism. The creep fracture mechanism changes from a transgranular mode in longitudinal specimens to intergranular failure in transverse and inclined (45degrees to applied stress axis) specimens. Compared with constant load, cyclic load remarkably reduces creep life with the increment of cyclic frequency, but has no effect on the creep ductility. After careful examination of the transient response following the load changes, it is suggested that an intrinsic softening occurred during unloading, which accelerates the creep deformation rate on subsequent reloading, and the accumulation of this softening effect finally results in cyclic creep acceleration. The contribution of anelasticity has also been discussed. |
原文出处 | |
公开日期 | 2012-04-14 |
源URL | [http://ir.imr.ac.cn/handle/321006/36516] ![]() |
专题 | 金属研究所_中国科学院金属研究所 |
推荐引用方式 GB/T 7714 | C. Yuan,J. T. Guo,H. C. Yang. Effect of grain boundary orientation and cyclic load on creep and fracture behaviour in directionally solidified nickel base superalloy[J]. Materials Science and Technology,2002,18(1):73-80. |
APA | C. Yuan,J. T. Guo,&H. C. Yang.(2002).Effect of grain boundary orientation and cyclic load on creep and fracture behaviour in directionally solidified nickel base superalloy.Materials Science and Technology,18(1),73-80. |
MLA | C. Yuan,et al."Effect of grain boundary orientation and cyclic load on creep and fracture behaviour in directionally solidified nickel base superalloy".Materials Science and Technology 18.1(2002):73-80. |
入库方式: OAI收割
来源:金属研究所
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