Tensile property and deformation behavior of a directionally solidified Ni-base superalloy

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	Tensile property and deformation behavior of a directionally solidified Ni-base superalloy
	Z. K. Chu; J. J. Yu; X. F. Sun; H. R. Guan; Z. Q. Hu
	2010
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	527 期号:12 页码:3010-3014
摘要	Tensile behavior of directionally solidified Ni-base superalloy DZ951 was studied in the temperature range of 20-1100 degrees C. Extensive TEM investigations were performed after tensile test to fracture. The yield and tensile strengths initially decrease slightly with temperature and reach minima at around 700 degrees C. With further increase in temperature, the yield and tensile strengths increase to maxima at about 760 degrees C and then decrease sharply. In contrast to changes in strength with temperature, elongation is without significant change from 20 to 700 degrees C and then decreases to a minimum at 760 degrees C. Beyond that point an increase in elongation with respect to temperature occurs. The intermediate temperature brittleness behavior for DZ951 alloy is remarkable. The deformation microstructures could be classified in three regimes. At low temperatures, the deformation was dominated by gamma' shearing by pairs of a/2 < 1 1 0 > dislocations. At high temperatures, the deformation was dominated by gamma' by-pass. Intermediate temperatures exhibited transitional behavior. The ductility minimum at 760 degrees C is due to strain localization mainly caused by stacking faults. (C) 2010 Elsevier B.V. All rights reserved.
部门归属	[chu, zhaokuang; yu, jinjiang; sun, xiaofeng; guan, hengrong; hu, zhuangqi] chinese acad sci, inst met res, shenyang 110076, peoples r china.;chu, zk (reprint author), chinese acad sci, inst met res, shenyang 110076, peoples r china;zkchu@imr.ac.cn
关键词	Ni-base Superalloy Ductility Deformation Stacking Faults Single-crystals Strain Rate Temperature Stress Dependence Alloy
URL	查看原文
WOS记录号	WOS:000276537100028
引用统计	被引频次：72[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/321006/31050
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. K. Chu,J. J. Yu,X. F. Sun,et al. Tensile property and deformation behavior of a directionally solidified Ni-base superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2010,527(12):3010-3014.
APA	Z. K. Chu,J. J. Yu,X. F. Sun,H. R. Guan,&Z. Q. Hu.(2010).Tensile property and deformation behavior of a directionally solidified Ni-base superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,527(12),3010-3014.
MLA	Z. K. Chu,et al."Tensile property and deformation behavior of a directionally solidified Ni-base superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 527.12(2010):3010-3014.