Neutron diffraction study of strain and stress induced by thermomechanical fatigue in a single crystal superalloy

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	Neutron diffraction study of strain and stress induced by thermomechanical fatigue in a single crystal superalloy
	E. Wu; J. Zhang; B. Chen; G. A. Sun; V. Ji; D. Hughes; T. Pirling
	2008
发表期刊	Journal of Physics-Condensed Matter
ISSN	0953-8984
卷号	20 期号:10
摘要	The relationship between internal stress and thermomechanical fatigue (TMF) in a Ni-based single crystal superalloy grown along the [001] axis was studied by neutron diffraction. The macroscopic internal stress along the loading axis generally increases with the TMF deformation. However, the internal stress in the precipitate gamma' phase increases more significantly than that in the matrix. phase and contributes more to the stress growth. During the TMF, the stress in the gamma' phase is larger than that of the gamma phase, thus the gamma' phase is stretched whereas the gamma phase is compressed along the loading axis. The microstrains in the gamma and gamma' phases also increase during TMF, but the trend does not follow that of the stresses. The evolutions of the internal stresses and microstrains, and the associated microstructure changes, appear to indicate that the failure by TMF is mostly caused by the residual stress concentration in the hardened gamma' phase.
部门归属	[wu, erdong; zhang, jun] imr cas, shenyang natl lab mat sci, shenyang, peoples r china. [ji, v.] univ paris 11, umr 8182, icmmo, lemhe, f-91405 orsay, france. [hughes, d.; pirling, t.] inst max von laue paul langevin, f-38042 grenoble, france.;wu, e (reprint author), imr cas, shenyang natl lab mat sci, shenyang, peoples r china
关键词	Nickel-based Superalloy Local Elastic Strains Base Superalloy X-ray Internal-stresses Mismatch Gamma' Creep
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33196
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	E. Wu,J. Zhang,B. Chen,et al. Neutron diffraction study of strain and stress induced by thermomechanical fatigue in a single crystal superalloy[J]. Journal of Physics-Condensed Matter,2008,20(10).
APA	E. Wu.,J. Zhang.,B. Chen.,G. A. Sun.,V. Ji.,...&T. Pirling.(2008).Neutron diffraction study of strain and stress induced by thermomechanical fatigue in a single crystal superalloy.Journal of Physics-Condensed Matter,20(10).
MLA	E. Wu,et al."Neutron diffraction study of strain and stress induced by thermomechanical fatigue in a single crystal superalloy".Journal of Physics-Condensed Matter 20.10(2008).