Tensile deformation and fracture characteristics of delta-processed Inconel 718 alloy at elevated temperature

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	Tensile deformation and fracture characteristics of delta-processed Inconel 718 alloy at elevated temperature
	S. H. Zhang; H. Y. Zhang; M. Cheng
	2011
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	528 期号:19-20 页码:6253-6258
摘要	Three specimens with different initial delta phase contents have been used to study the tensile deformation and fracture characteristics of the delta-processed Inconel 718 alloy at elevated temperatures by tensile tests at 950 degrees C. The results indicated that the tensile stress-strain curves of the three specimens were the elastic-uniform plastic curves, and there were two deformation processes during the uniform plastic deformation stage of the delta-processed specimens. The strain hardening exponent in the first deformation process was higher than that in the second process, and the value of the strain hardening exponent increased as the content of delta phase increased. In addition, the plasticity of the specimen at elevated temperatures decreased as the content of delta phase increased. However, the fracture mechanisms for all the specimens were all microvoid coalescence ductile fracture, and the delta phase and carbide were the nucleuses for the formation of micropores. The elongation for the specimen with 8.21% pre-precipitated delta phase was still as high as 80%. Thus, delta-processed Inconel 718 alloy presented excellent high-temperature plasticity. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[zhang, shi-hong; zhang, hai-yan; cheng, ming] chinese acad sci, inst met res, shenyang 110016, peoples r china.;zhang, sh (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;shzhang@imr.ac.cn
关键词	Inconel 718 Delta-processed Delta Phase Tensile Deformation Fracture Phase
URL	查看原文
WOS记录号	WOS:000292432500021
引用统计	被引频次：83[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/321006/30911
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. H. Zhang,H. Y. Zhang,M. Cheng. Tensile deformation and fracture characteristics of delta-processed Inconel 718 alloy at elevated temperature[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2011,528(19-20):6253-6258.
APA	S. H. Zhang,H. Y. Zhang,&M. Cheng.(2011).Tensile deformation and fracture characteristics of delta-processed Inconel 718 alloy at elevated temperature.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,528(19-20),6253-6258.
MLA	S. H. Zhang,et al."Tensile deformation and fracture characteristics of delta-processed Inconel 718 alloy at elevated temperature".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 528.19-20(2011):6253-6258.