文献类型：期刊文献

英文题名：Interactions between Indentation-Induced Dislocation and Coherent Twin Boundary Σ3 in Fcc Metal

作者：Xia, Wenzhen[1,4]; Zhang, Yulong[1]; Lv, Beibei[1]; Chen, Qinglong[1]; Cheng, Huijie[2]; Huo, Mingshuai[1]; Sun, Binhan[2]; Jiang, Zhengyi[3]; Duan, Huiling[4]

机构：[1] Institute of Microstructure and Micro/Nanomechanics, School of Metallurgical Engineering, Anhui University of Technology, Anhui, Maanshan, 243032, China; [2] Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [3] School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia; [4] College of Engineering, Peking University, Beijing, 100871, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240142592)

语种：英文

外文关键词：Austenitic stainless steel - Chromium alloys - Dislocations (crystals) - Shear stress

摘要：Crystal defects in metallic materials exert a profound influence on the plastic deformation process. The interaction mechanism between dislocations and twin boundaries within polycrystalline face-centered cubic (FCC) metals has been the subject of extensive scholarly investigation, owing to its frequent manifestation as a facial defect with a mirror-symmetric dislocation relationship. However, a comprehensive understanding of this phenomenon is not yet to be achieved. This study delves into the influence of coherent twin boundaries (CTB) Σ3 on dislocations induced by indentation in austenitic stainless-steel Fe-25Cr-20Ni, employing the nanoindentation technique. The examination elucidates the impact of twin boundaries on the deformation behavior during indentation by scrutinizing slip-steps and load-displacement curves. The determination of Burgers vectors of dislocations induced by nanoindentation, as they cross twin boundaries, was facilitated through the analysis of Thompson tetrahedral data pertaining to the grains. Ultimately, this study found that the critical resolved shear stresses essential for dislocations with varying Burgers vectors to cross the twin boundary are estimated utilizing the macroplastic finite element method. ? 2024, The Authors. All rights reserved.