Effect of Deformation Rate on the Elastic-Plastic Deformation Behavior of GH3625 Alloy

doi:10.11900/0412.1961.2020.00508

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Effect of Deformation Rate on the Elastic-Plastic Deformation Behavior of GH3625 Alloy
	Gao Yubi 1,2,3; Ding Yutian 2,3; Li Haifeng 6; Dong Hongbiao 5; Zhang Ruiyao 4; Li Jun 5; Luo Quanshun 1
刊名	ACTA METALLURGICA SINICA
	2022-05-01
卷号	58 期号:5 页码:695-708
关键词	GH3625 alloy deformation rate in situ neutron diffraction lattice strain elastic and plastic anisotropy
ISSN号	0412-1961
DOI	10.11900/0412.1961.2020.00508
英文摘要	GH3625 alloy is a typical polycrystalline material. The mechanical properties of a crystal within the alloy depend on the single crystal properties, lattice orientation, and orientations of neighboring crystals. However, accurate determination of single crystal properties is critical in developing a quantitative understanding of the micromechanical behavior of GH3625. In this study, the effect of deformation rate on the elastoplastic deformation behavior of GH3625 was investigated using in situ neutron diffraction room-temperature compression experiments, EBSD, and TEM. The results showed that the microscopic stress-strain curve included elastic deformation (applied stress sigma <= 300 MPa), elastoplastic transition (300 MPa < sigma <= 350 MPa), and plastic deformation (sigma > 350 MPa) stages, which agreed with the mesoscopic lattice strain behavior. Meanwhile, the deformation rate was closely related to the crystal elastic and plastic anisotropy. The results of the lattice strain, peak width, and peak intensity reflected by the specific hkl showed that the deformation rate had little effect on the elastic anisotropy of the crystal, but had a significant effect on the plastic anisotropy of the crystal. With the increase in the deformation rate, the high angle grain boundaries gradually changed to the low angle grain boundaries, and the proportion of twin boundaries gradually reduced. Also, the grains transformed from uniform deformation to nonuniform deformation. Moreover, with the increase in deformation rate, the total dislocation density (rho) of the alloy first decreased and then increased, whereas the geometrically necessary dislocation density (rho(GND)) monotonically increased, and the statistically stored dislocation (SSD) density (rho(SSD)) monotonically decreased. Meanwhile, the abnormal work hardening behavior of the sample at a deformation rate of 0.2 mm/min was mainly related to the SSD generated by uniform deformation. Additionally, the contribution of dislocation strengthening and TEM observation confirmed that the dominant deformation of GH3625 was dislocation slip, and its work hardening mechanism was dislocation strengthening.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000787207700010
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158698]
专题	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	1.Sheffield Hallam Univ, Mat & Engn Res Inst, Sheffield S1 1WB, S Yorkshire, England; 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China; 3.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 4.Open Univ, Engn & Innovat, Milton Keynes MK7 6AA, Bucks, England 5.Univ Leicester, Dept Engn, Leicester LE1 7RH, Leics, England; 6.Gen Res Inst Nonferrous Met, State Key Lab Nonferrous Met & Proc, Beijing 100088, Peoples R China;
推荐引用方式 GB/T 7714	Gao Yubi,Ding Yutian,Li Haifeng,et al. Effect of Deformation Rate on the Elastic-Plastic Deformation Behavior of GH3625 Alloy[J]. ACTA METALLURGICA SINICA,2022,58(5):695-708.
APA	Gao Yubi.,Ding Yutian.,Li Haifeng.,Dong Hongbiao.,Zhang Ruiyao.,...&Luo Quanshun.(2022).Effect of Deformation Rate on the Elastic-Plastic Deformation Behavior of GH3625 Alloy.ACTA METALLURGICA SINICA,58(5),695-708.
MLA	Gao Yubi,et al."Effect of Deformation Rate on the Elastic-Plastic Deformation Behavior of GH3625 Alloy".ACTA METALLURGICA SINICA 58.5(2022):695-708.