High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins

doi:10.1016/j.jmst.2021.06.082

CORC > 金属研究所 > 中国科学院金属研究所

	High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins
	Wang, Miao 2,3; Huang, Xingwei 1,4; Xue, Peng 1; Wu, Shangquan 2; Cui, Chuanyong 3; Zhang, Qingchuan 2
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2022-04-20
卷号	106 页码:162-172
关键词	Superalloy Friction stir processing Grain refinement Nanotwins
ISSN号	1005-0302
DOI	10.1016/j.jmst.2021.06.082
通讯作者	Cui, Chuanyong(chycui@imr.ac.cn) ; Zhang, Qingchuan(zhangqc@ustc.edu.cn)
英文摘要	The trade-off between strength and ductility has been an enormous difficulty in the field of materials for an extended time due to their inverse correlation. In this work, friction stir processing (FSP) was for the first time performed to high-strength and high-melting-point Ni-Co based superalloy (GH4068), and enhanced strength and ductility were achieved in FSP samples. At room temperature, the FSP sample demonstrated significantly higher yield strength and ultimate tensile strength (1290 and 1670 MPa) than that of the base material (BM, 758 and 904 MPa) and advanced wrought GH4068 alloy (982 and 1291 MPa), concurrent with high tensile ductility (similar to 24%). Compared with the BM, 70% higher yield strength of the FSP sample results from the remarkable contribution of grain-boundary and nanotwin strengthening, which has been confirmed by the multimechanistic model studied in this work. More importantly, with increasing temperature, an excellent strength-ductility synergy was obtained at 400 degrees C, i.e., the yield strength of the FSP sample was increased by more than 50% compared with the BM (from 789 to 1219 MPa); more interestingly, the elongation was also significantly increased from 17.9% in the BM to 28.5% in the FSP sample. Meanwhile, the Portevin-Le Chatelier effect was observed in the engineering stress-strain curve. The occurrence of this effect may be attributed to the interaction between solutes and defects like twins and mobile dislocations. Moreover, the grain refinement mechanism of FSP samples was proved to be discontinuous dynamic recrystallization. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	National Key R&D Pro-gram of China[2017YFA0700703] ; National Key R&D Pro-gram of China[2019YFA0705300] ; National Natural Science Foundation of China[11872354] ; National Natural Science Foundation of China[11627803] ; National Science and Technology Major Project[J2019-V-0 0 06-010 0] ; Strategic Priority Re-search Program of the Chinese Academy of Sciences[XDB22040502]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000787725900007
资助机构	National Key R&D Pro-gram of China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; Strategic Priority Re-search Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172602]
专题	金属研究所_中国科学院金属研究所
通讯作者	Cui, Chuanyong; Zhang, Qingchuan
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Superalloy Div, Shenyang 110016, Peoples R China 4.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230027, Peoples R China
推荐引用方式 GB/T 7714	Wang, Miao,Huang, Xingwei,Xue, Peng,et al. High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,106:162-172.
APA	Wang, Miao,Huang, Xingwei,Xue, Peng,Wu, Shangquan,Cui, Chuanyong,&Zhang, Qingchuan.(2022).High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,106,162-172.
MLA	Wang, Miao,et al."High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 106(2022):162-172.