Deformation features of a nickel-base superalloy single crystal during compression creep

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	Deformation features of a nickel-base superalloy single crystal during compression creep
	S. G. Tian; X. F. Yu; J. H. Yang; N. R. Zhao; Y. B. Xu; Z. Q. Hu
	2004
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	379 期号:1-2 页码:141-147
摘要	The microstructure evolution of a single crystal nickel-base superalloy with [0 0 1] orientation during compressive creep at 1040 degreesC has been investigated by means of the observation of transmission electron microscopy. Results show that the cuboidal gamma' phase in the alloy is transformed into the strip-like rafted structure along the direction parallel to [0 0 1] stress axis during compressive creep. During the primary creep, the deformation feature of the alloy is the 1/2<1 1 0> dislocations activated in the gamma matrix. After crept for 50 h, the strip-like rafted gamma' (Ni3Al) phase in alloy is sheared by the <1 1 0> super-dislocations which may be dissociated into the 1/3<1 1 2> super-Shockley dislocations. The SISF formed from the dissociation of the [1 0 (1) over bar] super-dislocation is enclosed by the partials loops. One of the reason resulting in a smaller strain value of the alloy during compressive creep is the Giameis locks made from a combination of the partials loops and SISF which hinder the continuous expansion of the original [1 0 (1) over bar] super-dislocation. (C) 2004 Elsevier B.V. All rights reserved.
部门归属	shenyang univ technol, dept mat sci & engn, shenyang 110023, peoples r china. chinese acad sci, inst met res, state key lab fatigue & fracture mat, shenyang 110015, peoples r china.;tian, sg (reprint author), shenyang univ technol, dept mat sci & engn, shenyang 110023, peoples r china;tiansugui2003@yahoo.com.cn
关键词	Single Crystal Nickel-base Superalloy Compression Creep Dislocation Mechanical-properties Volume Fraction Alloys Gamma' Orientation Ni3al Temperature Dependence Behavior Stress
URL	查看原文
WOS记录号	WOS:000223330100017
引用统计	被引频次：31[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/321006/35563
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. G. Tian,X. F. Yu,J. H. Yang,et al. Deformation features of a nickel-base superalloy single crystal during compression creep[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2004,379(1-2):141-147.
APA	S. G. Tian,X. F. Yu,J. H. Yang,N. R. Zhao,Y. B. Xu,&Z. Q. Hu.(2004).Deformation features of a nickel-base superalloy single crystal during compression creep.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,379(1-2),141-147.
MLA	S. G. Tian,et al."Deformation features of a nickel-base superalloy single crystal during compression creep".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 379.1-2(2004):141-147.