Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy

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	Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy
	L. Y. Sheng; F. Yang; T. F. Xi; C. Lai; J. T. Guo
	2013
发表期刊	Materials Research Innovations
ISSN	1432-8917
卷号	17 页码:S101-S106
摘要	In this paper, a nickel based superalloy with good corrosion resistance is fabricated by directional solidification, and its microstructure and tensile properties were investigated. Microstructure observations reveal that besides the gamma' precipitates and gamma matrix, some MC, Ni5Hf and M3B2 particles precipitate along the grain boundary. Tensile tests exhibit that the alloy has obvious anomalous yield and intermediate temperature brittleness (ITB) behaviour. The tensile properties depend on temperature significantly. Below 650 degrees C, the yield strength decreases slightly but rises rapidly between 650 and 750 degrees C, and after then, it decreases gradually with temperature increasing further. Examination by TEM exhibits that sharing of the gamma' by dislocation is almost the main deformation mechanism at low temperature, but the gamma' bypass dominates the deformation at high temperature and the transition temperature should be similar to 800 degrees C. In addition, the carbides and eutectic structure contribute partly to the ITB behaviours.
部门归属	[sheng, l. y. ; xi, t. f. ; lai, c.] peking univ, shenzhen inst, shenzhen 518057, peoples r china. [yang, f.] shenzhen baoan int airport, shenzhen airlines, shenzhen 518128, peoples r china. [guo, j. t.] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; sheng, ly (reprint author), peking univ, shenzhen inst, shenzhen 518057, peoples r china. ; lysheng@yeah.net
关键词	Nickel Based Superalloy Directional Solidification Microstructure Mechanical Properties Compressive Properties Single-crystals Alloys Creep Deformation Instability Extrusion Ductility Strength
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/321006/71451
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Y. Sheng,F. Yang,T. F. Xi,et al. Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy[J]. Materials Research Innovations,2013,17:S101-S106.
APA	L. Y. Sheng,F. Yang,T. F. Xi,C. Lai,&J. T. Guo.(2013).Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy.Materials Research Innovations,17,S101-S106.
MLA	L. Y. Sheng,et al."Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy".Materials Research Innovations 17(2013):S101-S106.