Assessing the critical role of Re and Co addition in flow stress of Ni-based single-crystal superalloy: A molecular dynamics study

doi:10.1016/j.mtcomm.2022.103296

IMECH-IR > 非线性力学国家重点实验室

	Assessing the critical role of Re and Co addition in flow stress of Ni-based single-crystal superalloy: A molecular dynamics study
	Liu, Shu-Lan 1,2; Yang, Hui-Jing 1
通讯作者	Yang, Hui-Jing(yanghj619@126.com)
发表期刊	MATERIALS TODAY COMMUNICATIONS
	2022-06-01
卷号	31 页码:8
摘要	Molecular dynamics simulations are conducted to study the effect of Re and Co addition in the Ni-based single-crystal superalloys on its flow stresses under varying temperature. It is found that Re and Co increase the flow stresses of the superalloys at 100, 300 and 500 K, respectively. The solid solution strengthening mechanism is enhanced with the addition of Re or Co atoms. Moreover, Re or Co promote dislocation nucleation and multiplication and, thus, increase the dislocation density which increases the possibility of forest dislocation interactions. The dislocation proliferation increases additional work hardening capability of the superalloy. At atomic scale, the 1/6<110> stair-rod dislocations were increased by more than 33% (or 11%) for the 2 at.% Re (or Co) systems. Due to the sessile nature of stair-rod dislocation, Re or Co will undeniably affect the mechanic properties of superalloy involving the dislocation mechanisms. For similar concentration of additions, Re is more effective in strengthening the single-crystal superalloys compared with the addition of Co.
关键词	Ni-based superalloy Molecular dynamics Flow stress Strengthening mechanism
DOI	10.1016/j.mtcomm.2022.103296
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000761179700003
关键词[WOS]	ALLOYING ELEMENTS ; CREEP ; MECHANISMS ; RU ; MICROSTRUCTURE ; DEFORMATION ; INTERFACE ; STRENGTH ; CRACKS
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
资助项目	Natural Science Foundation of China[11604237] ; Natural Science Foun-dation of Hebei Province of China[E2019105073] ; Natural Science Foun-dation of Hebei Province of China[E2015105079] ; Scientific Research Foundation of Tangshan Normal University of China[2016A06] ; Education and Teaching Reform Project of Tangshan Normal University of China[2019JG020]
项目资助者	Natural Science Foundation of China ; Natural Science Foun-dation of Hebei Province of China ; Scientific Research Foundation of Tangshan Normal University of China ; Education and Teaching Reform Project of Tangshan Normal University of China
论文分区	二类
力学所作者排名	1
RpAuthor	Yang, Hui-Jing
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/88734
专题	非线性力学国家重点实验室
作者单位	1.Tangshan Normal Univ, Sch Phys Sci & Technol, Tangshan 063000, Hebei, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, Shu-Lan,Yang, Hui-Jing. Assessing the critical role of Re and Co addition in flow stress of Ni-based single-crystal superalloy: A molecular dynamics study[J]. MATERIALS TODAY COMMUNICATIONS,2022,31:8.
APA	Liu, Shu-Lan,&Yang, Hui-Jing.(2022).Assessing the critical role of Re and Co addition in flow stress of Ni-based single-crystal superalloy: A molecular dynamics study.MATERIALS TODAY COMMUNICATIONS,31,8.
MLA	Liu, Shu-Lan,et al."Assessing the critical role of Re and Co addition in flow stress of Ni-based single-crystal superalloy: A molecular dynamics study".MATERIALS TODAY COMMUNICATIONS 31(2022):8.

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