Neutron diffraction study of stress and lattice mismatch induced by thermo-mechanical fatigue in single crystal superalloys

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	Neutron diffraction study of stress and lattice mismatch induced by thermo-mechanical fatigue in single crystal superalloys
	G. A. Sun; B. Chen; H. Chen; E. D. Wu; J. Zhang; V. Ji; D. Hughes; T. Pirling
	2009
发表期刊	Acta Physica Sinica
ISSN	1000-3290
卷号	58 期号:4 页码:2549-2555
摘要	The center points of the thermo-mechanical fatigued single crystal Ni-based superalloys were measured by neutron diffraction and the results have been treated in two methods: two overlapped peaks and a single peak. The macroscopic equivalent stress, deviatoric stress components, gamma/gamma' phase equivalent stress and lattice mismatch are determined according to the experimental results. The stress results show that the macroscopic equivalent stresses are basically consistent when using two analysis methods I the maximum of macroscopic equivalent stress and deviatoric stress components appeared at thermo-mechanical fatigue that of 100, cycles, and at this point, the micro-defects' such as dislocations, are saturated and the stress of gamma' phase away from the center was reduced remarkably. The calculated results also indicate that the negative lattice mismatch is reduce markedly at the! beginning of the thermo-mechanical fatigue. Subsequently, it increases linearly with the fatigue cycles at the speed 8.1 x 10(-6) per cycle because of the accumulated plastic strain in the matrix.
部门归属	[sun guang-ai; chen bo] sichuan univ, inst atom & mol phys, chengdu 610065, peoples r china. [sun guang-ai; chen bo; chen hua] china acad engn phys, inst nucl phys & chem, mianyang 621900, peoples r china. [wu er-dong; zhang jun] chinese acad sci, inst met res, natl lab mat sci, shenyang 110016, peoples r china. [ji, vincent] univ paris 11, lemhe icmmo, umr 8182, f-91405 paris, france. [hughes, darren; pirling, thilo] inst max von laue paul langevin, f-38042 grenoble, france.;sun, ga (reprint author), sichuan univ, inst atom & mol phys, chengdu 610065, peoples r china;guangaisun_80@sina.com
关键词	Neutron Diffraction Single Superalloy Equivalent Stress Deviatoric Stress Nickel-based Superalloy X-ray-diffraction Creep-deformation High-temperature Internal-stress Base Superalloy Sc16 Evolution Specimens Behavior
URL	查看原文
WOS记录号	WOS:000265324700065
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32300
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. A. Sun,B. Chen,H. Chen,et al. Neutron diffraction study of stress and lattice mismatch induced by thermo-mechanical fatigue in single crystal superalloys[J]. Acta Physica Sinica,2009,58(4):2549-2555.
APA	G. A. Sun.,B. Chen.,H. Chen.,E. D. Wu.,J. Zhang.,...&T. Pirling.(2009).Neutron diffraction study of stress and lattice mismatch induced by thermo-mechanical fatigue in single crystal superalloys.Acta Physica Sinica,58(4),2549-2555.
MLA	G. A. Sun,et al."Neutron diffraction study of stress and lattice mismatch induced by thermo-mechanical fatigue in single crystal superalloys".Acta Physica Sinica 58.4(2009):2549-2555.