Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.matchar.2020.110205
Title: Geometrically necessary dislocations distribution in face-centred cubic alloy with varied grain size
Authors: Zhang, J 
Wang, B 
Wang, H 
Issue Date: 1-Apr-2020
Publisher: Elsevier BV
Citation: Zhang, J, Wang, B, Wang, H (2020-04-01). Geometrically necessary dislocations distribution in face-centred cubic alloy with varied grain size. Materials Characterization 162 : 110205-110205. ScholarBank@NUS Repository. https://doi.org/10.1016/j.matchar.2020.110205
Abstract: © 2020 Elsevier Inc. The evolution of geometrically necessary dislocation (GND) distribution in the deformed 6061 alloy is studied with electron back scatter diffraction (EBSD) and transmission electron microscope (TEM). In dynamic recrystallized state, the average GND density is 8.70 × 1014 m−2 with grain size ~30 μm. In annealed state, the average GND density decreases by an order of magnitude, from 6.81 × 1015 to 7.32 × 1013 m−2 (annealing temperature from 200 to 500 °C) accompanied by increasing grain size. Moreover, the sample has greatest ductility with lowest GND density. According to the tendency of dislocations in TEM, GND gradually migrate from near (200) plane to near (220) plane with increasing annealing temperature. Additionally, GND mainly concentrate on the grain boundaries in the deformed state, and the GND distribution is more homogenous after annealing. It is shown that the GND density is related to the grain boundary type and misorientation angle between adjacent grains. The relationship between average GND density and grain size is approximately parabolic.
Source Title: Materials Characterization
URI: https://scholarbank.nus.edu.sg/handle/10635/168900
ISSN: 10445803
DOI: 10.1016/j.matchar.2020.110205
Appears in Collections:Staff Publications
Elements

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
pagination_MTL_110205.pdfAccepted version2.38 MBAdobe PDF

OPEN

Post-printView/Download

SCOPUSTM   
Citations

16
checked on Aug 7, 2022

WEB OF SCIENCETM
Citations

4
checked on Oct 7, 2021

Page view(s)

177
checked on Aug 4, 2022

Download(s)

1
checked on Aug 4, 2022

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.