文献类型：期刊文献

英文题名：A novel model to predict microvoid evolution in tensile necking using macroscopic deformation behavior

作者：Long, Shao-Lei Yi, Yan-Liang Gui, Qin Long, Xiao Su, Ming-Hui Liang, Yi-Long

通信作者：Liang, YL[1];Yi, YL[2]

机构：[1]Guizhou Inst Technol, Sch Mat & Energy, Guiyang 550003, Guizhou, Peoples R China;[2]Guizhou Univ, Coll Mat & Met, Guiyang 550028, Guizhou, Peoples R China;[3]Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Guiyang 550028, Guizhou, Peoples R China;corresponding author), Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China.

年份：2023

卷号：25

起止页码：2040-2048

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20232714345717);Scopus(收录号：2-s2.0-85163799405);WOS:【SCI-EXPANDED(收录号:WOS:001091654100001)】；

基金：The research documented in this work was financially supported by the Natural Science Foundation of Guizhou Province, China (Grant Nos. [2020] 1Y199 and [2018] 247) . The authors do not have any possible conflicts of interest.

语种：英文

外文关键词：Time-dependent observations; Necking; Plastic deformation; Gaussian distribution; Critical hole expansion ratio model; Bridgeman equation

摘要：Using the final state analysis method (fracture morphology analysis), it is difficult to establish the dynamic changes that would have occurred during the process of necking under tensile load. In this paper, the time-dependent observations, the critical hole expansion ratio model and the Bridgeman equation is applied to establish the relationship between the dynamics of necking and the microscopic parameters that describe fracture in samples made from the low-carbon steel. The results show that the axial (x) and radial (y) displacements observed in the necking process are described by the Gaussian function. And the curve of the neck contraction (yc) and time (t) indicates that the macroscopic deformation process behind necking can be divided into three stages, which correspond to microcrack propagation in the fiber area, the radiation area, and the shear lip area. Following, by considering the fitted model of x-y, the critical hole expansion ratio model and the Bridgeman equation, a novel model between the macroscopic deformation (parameters of yc and epsilon t) observed in necking and the formation of micropores (parameter of Rc) is established, which can disclose the effect of macroscopic deformation on the formation of the micro-voids, and plays a role in the study of plastic deformation mechanisms in a wide range of materials.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).