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Portevin-Le Chatelier Effect in Nimonic 263 Superalloy
Han, Guo-Ming; Tian, Cheng-Gang; Cui, Chuan-Yong; Hu, Zhuang-Qi; Sun, Xiao-Feng; chycui@imr.ac.cn
2015
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume28Issue:5Pages:542-549
AbstractThe Portevin-Le Chatelier (PLC) effect in the Nimonic 263 superalloy was investigated by tensile test at a wide temperature ranges from 293 to 1033 K and strain rates between 0.1 and 6.25 x 10(-6) s(-1). Simple binary alloys Ni-0.4C, Ni-24Cr and Ni-5(8)Mo were also tested in order to identify which elements were responsible for the PLC effect in the Nimonic 263 alloy. The results demonstrated that for Nimonic 263 alloy, PLC effect occurred at certain temperatures and low strain rates. Normal PLC effect exhibiting type-A and -(A + B) serrations was attributed to the enhanced solute diffusion with increasing temperature, while inverse PLC effect with type-C serration was caused by unlocking process. The activation energy for the normal PLC effect was calculated to be 68 kJ/mol, and diffusion of substitutional solutes such as Cr and Mo was identified to be responsible for the PLC effect. In comparison with the PLC effect in simple binary alloys, solute atmospheres formed by different kinds of atoms in Nimonic 263 alloy work more effectively, increasing locking strength and corresponding mean stress drop magnitude.
description.department[han, guo-ming ; tian, cheng-gang ; cui, chuan-yong ; hu, zhuang-qi ; sun, xiao-feng] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordPlc Effect Dynamic Strain Aging Nickel-base Alloys Solute Atom
Funding OrganizationHundreds of Talents Project; National Basic Research Program of China [2010CB631206, 51171179, 51128101, 51271174]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75062
Collection中国科学院金属研究所
Corresponding Authorchycui@imr.ac.cn
Recommended Citation
GB/T 7714
Han, Guo-Ming,Tian, Cheng-Gang,Cui, Chuan-Yong,et al. Portevin-Le Chatelier Effect in Nimonic 263 Superalloy[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2015,28(5):542-549.
APA Han, Guo-Ming,Tian, Cheng-Gang,Cui, Chuan-Yong,Hu, Zhuang-Qi,Sun, Xiao-Feng,&chycui@imr.ac.cn.(2015).Portevin-Le Chatelier Effect in Nimonic 263 Superalloy.ACTA METALLURGICA SINICA-ENGLISH LETTERS,28(5),542-549.
MLA Han, Guo-Ming,et al."Portevin-Le Chatelier Effect in Nimonic 263 Superalloy".ACTA METALLURGICA SINICA-ENGLISH LETTERS 28.5(2015):542-549.
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