Investigation on In Situ Tensile Behavior of Superalloy Bicrystals with Different GB Misorientations

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	Investigation on In Situ Tensile Behavior of Superalloy Bicrystals with Different GB Misorientations
	H. Xu; P. Li; Y. Z. Zhou; J. G. Li; T. Jin; X. F. Sun; Z. F. Zhang
	2014
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	45A 期号:9 页码:3876-3881
摘要	The in situ tensile behavior of nickel-base superalloy bicrystals with different grain boundary (GB) misorientations of 2 deg, 10 deg, and 16 deg was preliminarily studied. Among three kinds of bicrystals, the bicrystal with 2 deg misorientation was characterized with continuous slow strain hardening as well as crack initiation and propagation along the SB-matrix interface due to the full development of slip bands (SBs). In contrast, GBs in 10 deg and 16 deg bicrystals could effectively impede the SBs. Thus, the crack initiation occurred along the carbide/matrix interface, and more specifically cracks in 16 deg bicrystal fully propagated along the GB. Irregular GB in superalloy bicrystals consists of three types of GB segments. Among them, parallel GB is distinctly beneficial to GB strengthening and improving the yield strength of bicrystal. The statistical results showed that the proportion of parallel GB in the 10 deg bicrystal is the highest. Meanwhile, the GB in 10 deg bicrystal possesses higher resistance to crack extending, which can be attributed to its highest carbide fraction at the GB. Thus, its fracture exhibited a mixed mode of both GB and SB cracking.
部门归属	[xu, h. ; li, p. ; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [zhou, y. z. ; li, j. g. ; jin, t. ; sun, x. f.] chinese acad sci, inst met res, superalloy div, shenyang 110016, peoples r china. ; xu, h (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china. ; yzzhou@imr.ac.cn
关键词	Grain-boundary Morphology Solidified Nickel-alloy Base Superalloy Deformation Castability Copper Creep Ni
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73454
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Xu,P. Li,Y. Z. Zhou,et al. Investigation on In Situ Tensile Behavior of Superalloy Bicrystals with Different GB Misorientations[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2014,45A(9):3876-3881.
APA	H. Xu.,P. Li.,Y. Z. Zhou.,J. G. Li.,T. Jin.,...&Z. F. Zhang.(2014).Investigation on In Situ Tensile Behavior of Superalloy Bicrystals with Different GB Misorientations.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,45A(9),3876-3881.
MLA	H. Xu,et al."Investigation on In Situ Tensile Behavior of Superalloy Bicrystals with Different GB Misorientations".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 45A.9(2014):3876-3881.