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The Dependence of Portevin-Le ChA cent telier Effect on the gamma' Precipitates in a Wrought Ni-Base Superalloy
Wang, XG; Han, GM; Cui, CY; Guan, S; Jin, T; Sun, XF; Hu, ZQ; Cui, CY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2016-12-01
发表期刊METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
卷号47A期号:12页码:5994-6003
摘要The dependence of Portevin-Le ChA cent telier (PLC) effect on the gamma' precipitates of the Nimonic 263 alloy in different microstructural conditions has been studied by analyzing the parameters of the tensile curves and the deformation mechanisms. It is shown that the gamma' precipitates with different sizes, edge-to-edge interprecipitate distance, and areal number density are obtained by altering the aging time. It is demonstrated that when the mean size of the gamma' precipitates is less than 28 nm (aging less than 25 hours), the deformation mechanisms are dominated by APB-coupled a/2aOE (c) 101 > dislocations shearing the small gamma' precipitates and the slip bands continuously cutting the gamma and gamma' phases. When the gamma' size is between 28 and 45 nm (aging time between 25 and 50 hours), the deformation mechanism is controlled by the APB-coupled a/2aOE (c) 101 > dislocations shearing the small gamma' precipitates, the a/6aOE (c) 112 > Shockley partial dislocation continuously shearing the gamma and gamma' phases combined with matrix dislocations by-passing the gamma' precipitates; If the gamma' size over 45 nm (aging time more than 50 hours), Orowan by-passing becomes the main deformation mechanism. Moreover, with increasing the aging time, the critical plastic strain for the onset of the PLC effect increases and reaches a maximum after aging for 50 hours, and then gradually decreases. At last, the dependence of critical plastic strain on the deformation mechanisms is well explained by the elementary incremental strain (gamma). The precipitation process of the gamma' phase can directly influence the PLC effect by changing the interactions among solutes atoms, mobile dislocations, and forest dislocations.
部门归属[wang, xinguang ; han, guoming ; cui, chuanyong ; guan, shuai ; jin, tao ; sun, xiaofeng ; hu, zhuangqi] chinese acad sci, inst met res, shenyang 110016, peoples r china
学科领域Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者High Technology Research and Development Program of China [2014AA041701]; National Natural Science Foundation of China (NSFC) [51171179, 11332010, 51271174, 51401210]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/76166
专题中国科学院金属研究所
通讯作者Cui, CY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Wang, XG,Han, GM,Cui, CY,et al. The Dependence of Portevin-Le ChA cent telier Effect on the gamma' Precipitates in a Wrought Ni-Base Superalloy[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2016,47A(12):5994-6003.
APA Wang, XG.,Han, GM.,Cui, CY.,Guan, S.,Jin, T.,...&Cui, CY .(2016).The Dependence of Portevin-Le ChA cent telier Effect on the gamma' Precipitates in a Wrought Ni-Base Superalloy.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,47A(12),5994-6003.
MLA Wang, XG,et al."The Dependence of Portevin-Le ChA cent telier Effect on the gamma' Precipitates in a Wrought Ni-Base Superalloy".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 47A.12(2016):5994-6003.
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