Activation Energy Calculations for the Portevin-Le Chatelier Effect in Nimonic 263 Superalloy

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	Activation Energy Calculations for the Portevin-Le Chatelier Effect in Nimonic 263 Superalloy
	Han, G. M.; Tian, C. G.; Chu, Z. K.; Cui, C. Y.; Hu, Z. Q.; Sun, X. F.; chycui@imr.ac.cn
	2015
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN	1073-5623
卷号	46A 期号:10 页码:4629-4635
摘要	The Portevin-Le Chatelier (PLC) effect in the Nimonic 263 superalloy was investigated by tensile test in a wide temperature range, from room temperature to 1033 K (760 A degrees C), and at strain rates between 0.1 and 4 x 10(-4) s(-1). Types A, B, and C serrations were observed depending upon the test temperatures and strain rates. The activation energy (Q) for serrated flow was determined by employing various methodologies for T < 723 K (450 A degrees C), where a normal PLC effect was observed. The value of Q was found to be independent of the method employed. The average Q value of 70 KJ/mol was found to be in agreement with that for diffusion of substitutional solutes such as Cr and Mo in a Ni matrix by pipe diffusion. At temperatures ranging from 723 K to 923 K (450 A degrees C to 650 A degrees C), type C serrations and an inverse PLC effect were noticed, which may be caused by unlocking process.
部门归属	[han, g. m. ; tian, c. g. ; chu, z. k. ; cui, c. y. ; hu, z. q. ; sun, x. f.] chinese acad sci, inst met res, superalloy div, shenyang 110016, peoples r china
资助者	High Technology Research and Development Program of China [2014AA041701]; National Natural Science Foundation of China (NSFC) [51171179, 51271174, 51331005, 11332010]
收录类别	sci
语种	英语
WOS记录号	WOS:000360558200024
引用统计	被引频次：20[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/321006/74613
专题	中国科学院金属研究所
通讯作者	chycui@imr.ac.cn
推荐引用方式 GB/T 7714	Han, G. M.,Tian, C. G.,Chu, Z. K.,et al. Activation Energy Calculations for the Portevin-Le Chatelier Effect in Nimonic 263 Superalloy[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2015,46A(10):4629-4635.
APA	Han, G. M..,Tian, C. G..,Chu, Z. K..,Cui, C. Y..,Hu, Z. Q..,...&chycui@imr.ac.cn.(2015).Activation Energy Calculations for the Portevin-Le Chatelier Effect in Nimonic 263 Superalloy.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,46A(10),4629-4635.
MLA	Han, G. M.,et al."Activation Energy Calculations for the Portevin-Le Chatelier Effect in Nimonic 263 Superalloy".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 46A.10(2015):4629-4635.