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Refining Micron-Sized Grains to Nanoscale in Ni-Co Based Superalloy by Quasistatical Compressive Deformation at High Temperature

文献类型：期刊论文

作者Xu, Hui2,3; Guo, Yanjun2; Wang, Jiangwei3; Li, Ze2; Wang, Lu2; Li, Xiaohui2; Zhang, Zhefeng1
刊名COATINGS
出版日期2023-08-01
卷号13期号:8页码:8
关键词superalloy nanograin microtwin dislocation compression
DOI10.3390/coatings13081325
通讯作者Xu, Hui(hui-xu@chder.com) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn)
英文摘要Compressive deformation was carried out in an Ni-Co-based superalloy with relatively low stacking fault energy (SFE) at 725 & DEG;C and a strain rate of 10-2 s-1; the underlying micromechanisms were investigated under true compression strains varying from 0.1 to 1.0. It was found that dislocation slipping accompanied by stacking fault (SF) shearing dominated the compressive deformation under the strain of 0.1 and 0.2. As the strain increased to 0.3 and 0.4, microtwinning was activated and then interacted with dislocations, leading to the formation of dislocation tangles or blocky distorted region. When true strain was further increased to 0.6, abundant subgains (SGs) with polygonous shape appeared and then transformed into nanograins as true strain increased to 1.0. It is demonstrated that high strain and microtwinning are the prerequisites for the evolution of nanograins in the deformed Ni-Co-based superalloy. High strain can produce plentiful dislocations and distorted micro-sized SGs; then the microtwins sheared these distorted regions and refined the micro-sized SGs into nanoscale, which subsequently transformed into nanograins with further deformation.
资助项目The authors are also grateful to the Material Service Behavior Division of Institute of Metal Research. ; Material Service Behavior Division of Institute of Metal Research
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:001056712800001
出版者MDPI
资助机构The authors are also grateful to the Material Service Behavior Division of Institute of Metal Research. ; Material Service Behavior Division of Institute of Metal Research
源URL[http://ir.imr.ac.cn/handle/321006/178990]  
专题金属研究所_中国科学院金属研究所
通讯作者Xu, Hui; Zhang, Zhefeng
作者单位1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
2.Huadian Elect Power Res Inst Co Ltd, Mat Res Ctr, Hangzhou 310030, Peoples R China
3.Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Hui,Guo, Yanjun,Wang, Jiangwei,et al. Refining Micron-Sized Grains to Nanoscale in Ni-Co Based Superalloy by Quasistatical Compressive Deformation at High Temperature[J]. COATINGS,2023,13(8):8.
APA Xu, Hui.,Guo, Yanjun.,Wang, Jiangwei.,Li, Ze.,Wang, Lu.,...&Zhang, Zhefeng.(2023).Refining Micron-Sized Grains to Nanoscale in Ni-Co Based Superalloy by Quasistatical Compressive Deformation at High Temperature.COATINGS,13(8),8.
MLA Xu, Hui,et al."Refining Micron-Sized Grains to Nanoscale in Ni-Co Based Superalloy by Quasistatical Compressive Deformation at High Temperature".COATINGS 13.8(2023):8.

入库方式： OAI收割

来源：金属研究所

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