Quantification of thermal residual stresses relaxation in AA7xxx aluminium alloy through cold rolling
File(s)manuscript (final version).docx (4.24 MB)
Accepted version
Author(s)
Pan, R
Pirling, T
Zheng, J
Lin, J
Davies, CM
Type
Journal Article
Abstract
Residual stresses (RS) are often induced through quenching of aluminum alloys and present a potential risk of developing crack or distortion in subsequent manufacturing processes. Study of methods to minimise the RS in quenched components is of practical importance. In this paper, cold rolling (CR) has been carried out to remove the RS in quenched AA7050 blocks. The CR effect on relaxing RS in quenched AA7050 blocks has been evaluated via the neutron diffraction (ND), X-ray diffraction (XRD) and contour techniques. The results reveal that although CR transforms near-surface residual stresses from large compression to large tension along the rolling direction, it results in remarkable RS relief in the core part of the material. An integrated finite element model for RS evolution through the CR process was put forward and has been validated by the experimental results.
Date Issued
2019-02-01
Date Acceptance
2018-09-28
Citation
Journal of Materials Processing Technology, 2019, 264, pp.454-468
ISSN
0924-0136
Publisher
Elsevier
Start Page
454
End Page
468
Journal / Book Title
Journal of Materials Processing Technology
Volume
264
Copyright Statement
© 2018 Elsevier B.V. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Beijing Aeronautical Manufacturing Technology Research Institute
Grant Number
EP/I004351/1
N/A
Subjects
0913 Mechanical Engineering
0912 Materials Engineering
0910 Manufacturing Engineering
Materials
Publication Status
Published
Date Publish Online
2018-10-01