Neutron diffraction study of aging process effect on phase structure of single crystal superalloy

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	Neutron diffraction study of aging process effect on phase structure of single crystal superalloy
	G. A. Sun; B. Chen; E. D. Wu; W. H. Li; G. Zhang; X. L. Wang; V. Ji; T. Pirling; D. Hughes
	2011
发表期刊	Acta Physica Sinica
ISSN	1000-3290
卷号	60 期号:8
摘要	The neutron diffraction results obtained by oscillating and fixing phi during data collection show that the high ageing temperature is effective to eliminate dendrite crystals and the microstrain exists mainly in the gamma' phase. Based on the microstructure obtained by neutron diffraction and scanning electron microscope, the influence of ageing temperature and time on gamma' phase are evaluated. The unique misorientations among gamma' phase grains are observed from superlattice measurements. According to the neutron diffractions of different crystal planes, the crystal symmetry is slightly changed from cubic to quartet (a < c) due mainly to the gamma matrix phase and the experimental results also prove the strain deviation in difference orientations, thus providing the basis for the existence of driving force for the raft model. The calculation based on the superlattice diffraction shows that in the interfaces between the gamma and gamma' phases exists a complex distortion: the mismatch varies from -0.1% to -0.3% and the mismatch value can be reduced by high temperature during the first ageing and long time during the second ageing.
部门归属	[sun guang-ai; chen bo; wang xiao-lin] china acad engn phys, inst nucl phys & chem, mianyang 621900, peoples r china. [wu er-dong; li wu-hui; zhang gong] chinese acad sci, inst met res, natl lab mat sci, shenyang 110016, peoples r china. [ji, vincent] univ paris 11, inst orsay mol chem & mat, f-91405 orsay, france. [pirling, thilo; hughes, darren] inst max von laue paul langevin, f-38042 grenoble, france.;sun, ga (reprint author), china acad engn phys, inst nucl phys & chem, mianyang 621900, peoples r china;guangaisun_80@sina.com
关键词	Single Crystal Superalloys Neutron Diffraction Superlattice Aging Process X-ray-diffraction Nickel-base Superalloy Lattice Distortion Creep-deformation Temperature Sc16 Stress Mismatch Misfit
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WOS记录号	WOS:000294392400067
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30683
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,E. D. Wu,et al. Neutron diffraction study of aging process effect on phase structure of single crystal superalloy[J]. Acta Physica Sinica,2011,60(8).
APA	G. A. Sun.,B. Chen.,E. D. Wu.,W. H. Li.,G. Zhang.,...&D. Hughes.(2011).Neutron diffraction study of aging process effect on phase structure of single crystal superalloy.Acta Physica Sinica,60(8).
MLA	G. A. Sun,et al."Neutron diffraction study of aging process effect on phase structure of single crystal superalloy".Acta Physica Sinica 60.8(2011).