Influence of near-surface dislocation cellular structure on Bauschinger effect

Sun, Qingqing; Zhang, Haizheng; Li, Huabing; Wang, Shuai

2021-08-01

10.1016/j.jmrt.2021.06.010

Journal of Materials Research and Technology-JMR&T   影响因子和分区

2238-7854

2214-0697

Long range internal stress (LRIS) based mechanism and non-LRIS explanation regarding Bauschinger effect are in debate. LRIS is originated from dislocation pile-up and/or cell generated by the pre-loading, therefore dislocation structure characterization of pre strained sample is critical to clarify this academic dispute. Dislocation structures in surface and bulk regions of pure Ni deformed to a low strain level are characterized and compared in this work. Discrete dislocations are presented as expected in the bulk region of Ni, however, the main feature in its surface region is dislocation cell with average size of 1.2 mm. The result suggests that the promoted development of dislocation cellular pattern in near-surface region plays a critical role in the Bauschinger effect. It helps to clarify the mechanisms of Bauschinger effect and reconfirm the LRIS based mechanism. (c) 2021 The Authors. 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/).

Deformation and fracture Electron microscopy Metals and alloys

SCI ; EI

英语

第一 ; 通讯

China Postdoctoral Science Foundation[223278] ; Department of Education of Guangdong Province[2018KQNCX227] ; National Natural Science Foundation of China[51901098]

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000677655000002

ELSEVIER

20212810626822

Electron microscopy ; Piles ; Strength of materials

Structural Members and Shapes:408.2 ; Metallurgy:531.1 ; Materials Science:951

Web of Science

Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Guangdong, Peoples R China

Sun, Qingqing,Zhang, Haizheng,Li, Huabing,et al. Influence of near-surface dislocation cellular structure on Bauschinger effect[J]. Journal of Materials Research and Technology-JMR&T,2021,13:2012-2015.

Sun, Qingqing,Zhang, Haizheng,Li, Huabing,&Wang, Shuai.(2021).Influence of near-surface dislocation cellular structure on Bauschinger effect.Journal of Materials Research and Technology-JMR&T,13,2012-2015.

Sun, Qingqing,et al."Influence of near-surface dislocation cellular structure on Bauschinger effect".Journal of Materials Research and Technology-JMR&T 13(2021):2012-2015.