Effects of grain refinement on the microstructure and tensile behavior of K417G superalloy

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	Effects of grain refinement on the microstructure and tensile behavior of K417G superalloy
	B. N.; Yang Du, J. X.; Cui, C. Y.; Sun, X. F.
	2015
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	623 页码:59-67
摘要	The effects of grain refinement on the microstructures and tensile properties of Ni-based cast superalloy K417G were investigated. The results show that grain refinement could refine the microstructure, and increase the proportions of carbides and eutectics distributed at the grain boundary, which changes the tensile fracture mode from transgranular to intergranular. The effects of grain refinement on the tensile properties vary with temperature. At 21 degrees C, the strength and ductility of K417G superalloy both increase with grain refinement. At 700 degrees C, as there is grain refining, the yield strength and tensile strength increase whereas the ductility decreases. At 900 degrees C, the yield strength and tensile strength change little, whereas the ductility decreases as the grain refines. Grain refinement has refined the gamma' phase and narrowed the gamma channels so that the resistance of the dislocation movement during tensile deformation is influenced. 2014 Elsevier B.V. All rights reserved.
部门归属	[du, beining ; yang, jinxia ; cui, chuanyong ; sun, xiaofeng] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; cui, cy (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china. ; chycui@imr.ac.cn
关键词	Nickel Superalloy Grain Refinement Microstructure Tensile Properties Intermediate-temperature Embrittlement Nickel-base Superalloy High-cycle Fatigue Stress-rupture Heat-treatment Alloy Ni Mechanisms Size Resistance
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/321006/73789
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	B. N.,Yang Du, J. X.,Cui, C. Y.,et al. Effects of grain refinement on the microstructure and tensile behavior of K417G superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2015,623:59-67.
APA	B. N.,Yang Du, J. X.,Cui, C. Y.,&Sun, X. F..(2015).Effects of grain refinement on the microstructure and tensile behavior of K417G superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,623,59-67.
MLA	B. N.,et al."Effects of grain refinement on the microstructure and tensile behavior of K417G superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 623(2015):59-67.