Effect of Co Content and Temperature on Shear Mechanical Properties of Nano-Polycrystalline Ni–Co Alloy

doi:10.1002/pssb.202200064

	Effect of Co Content and Temperature on Shear Mechanical Properties of Nano-Polycrystalline Ni–Co Alloy
	Chen, Xiaotong; Lu, Xuefeng; Ren, Junqiang; Xue, Hongtao; Tang, Fuling; Ding, Yutian
刊名	Physica Status Solidi (B) Basic Research
	2022
卷号	259 期号:7
关键词	Atoms Cobalt alloys Grain boundaries Nanocrystals Nickel Shear flow Shear stress Co content Effect of CO Grain-boundaries Lattice distortions Ni-Co alloy Nickel cobalt alloys Partial dislocations Polycrystalline Polycrystalline nickels Temperature factor
ISSN号	0370-1972
DOI	10.1002/pssb.202200064
英文摘要	Herein, the effects of different Co content and temperature factors on the shear mechanical properties of nano-polycrystalline nickel–cobalt alloy are analyzed by molecular dynamics (MD) simulations. It is found in the work that the highest shear modulus of 63.03 GPa is obtained when the Co content is 10%, attributed to the lattice distortion caused by the difference in the lattice parameters between two elements. During the shearing process, the multilevel twins are present with intensification of the deformation process, resulting in excellent dynamic shear performance. Shockley dislocations will drive the stacking faults and other partial dislocations to constitute a tetrahedral edge, and finally forms a tetrahedral structure. In addition, as the temperature of the shear environment increases, the highest strain and stress decrease. The grain boundary atoms increase significantly, and the atoms inside the grains decrease accordingly. As the degree of atomic disorder increases, the grain boundaries will melt gradually. The decrease of partial dislocation density can weaken the entanglement effect caused by dislocations. The previous conclusions promote the product development and application of nano-polycrystalline alloys in the future, and provide important guidance significant for the engineering application of nickel–cobalt alloys. © 2022 Wiley-VCH GmbH.
语种	英语
出版者	John Wiley and Sons Inc
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159093]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Chen, Xiaotong,Lu, Xuefeng,Ren, Junqiang,et al. Effect of Co Content and Temperature on Shear Mechanical Properties of Nano-Polycrystalline Ni–Co Alloy[J]. Physica Status Solidi (B) Basic Research,2022,259(7).
APA	Chen, Xiaotong,Lu, Xuefeng,Ren, Junqiang,Xue, Hongtao,Tang, Fuling,&Ding, Yutian.(2022).Effect of Co Content and Temperature on Shear Mechanical Properties of Nano-Polycrystalline Ni–Co Alloy.Physica Status Solidi (B) Basic Research,259(7).
MLA	Chen, Xiaotong,et al."Effect of Co Content and Temperature on Shear Mechanical Properties of Nano-Polycrystalline Ni–Co Alloy".Physica Status Solidi (B) Basic Research 259.7(2022).