Quantification of thermal residual stresses relaxation in AA7xxx aluminium alloy through cold rolling

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Title: Quantification of thermal residual stresses relaxation in AA7xxx aluminium alloy through cold rolling
Author(s): Pan, R
Pirling, T
Zheng, J
Lin, J
Davies, CM
Item 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.
Publication Date: 1-Feb-2019
Date of Acceptance: 28-Sep-2018
URI: http://hdl.handle.net/10044/1/63982
DOI: https://dx.doi.org/10.1016/j.jmatprotec.2018.09.034
ISSN: 0924-0136
Publisher: Elsevier
Start Page: 454
End Page: 468
Journal / Book Title: Journal of Materials Processing Technology
Volume: 264
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Beijing Aeronautical Manufacturing Technology Research Institute
Funder's Grant Number: EP/I004351/1
N/A
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/
Keywords: 0913 Mechanical Engineering
0912 Materials Engineering
0910 Manufacturing Engineering
Materials
Publication Status: Published
Embargo Date: 2020-10-01
Online Publication Date: 2018-10-01
Appears in Collections:Faculty of Engineering
Mechanical Engineering



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