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High rate and temperature-dependent tensile characterisation with modelling for gap-bridged remote laser welded (RLW) joint using automotive AA5182 alloy

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Das, Abhishek, Beaumont, Richard Adrian, Butterworth, Ian, Masters, Iain and Williams, D. K. (2020) High rate and temperature-dependent tensile characterisation with modelling for gap-bridged remote laser welded (RLW) joint using automotive AA5182 alloy. International Journal of Impact Engineering, 144 . 103672. doi:10.1016/j.ijimpeng.2020.103672 ISSN 0734-743X.

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Official URL: https://doi.org/10.1016/j.ijimpeng.2020.103672

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Abstract

This paper investigates the high rate tensile behaviour of fillet edge joints produced by ‘gap-bridged’ remote laser welding (RLW) using aluminium alloy AA5182. The RLW ‘gap-bridged’ test specimens were produced considering three levels of the part-to-part gap; 0.0, 0.2, and 0.4 mm. Lap shear tests were performed to evaluate the high rate sensitivity in the test speed range from moderate (0.1 m/s) to high-speed rate (10 m/s) at room temperature (~23 °C). This equates to a strain rate range from moderate (~ 10 s−1) to near 1000 s−1. Strain rate dependency was found to be low, however, an increase in tensile extension to failure was observed with increasing strain rate. Additionally, the effects of depressed (−50 °C) to elevated temperatures (up to 300 °C) on the joint tensile performance were evaluated. Fracture strain was computed at room temperature using the digital image correlation (DIC) method and the fracture strain across the weld area was in the range from 0.140 to 0.194 for all the gap and speed conditions. This paper compares the RLW experimental test results with finite element modelling for industrial use. To evaluate joint performance, the lap shear strength of RLW samples was also compared with self-piercing riveting and resistance spot welding.

Item Type: Journal Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TN Mining engineering. Metallurgy
T Technology > TS Manufactures
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Laser welding, Fracture mechanics , Metals -- Fracture, Aluminum , Finite element method
Journal or Publication Title: International Journal of Impact Engineering
Publisher: Elsevier
ISSN: 0734-743X
Official Date: October 2020
Dates:
DateEvent
October 2020Published
21 July 2020Available
15 July 2020Accepted
Volume: 144
Article Number: 103672
DOI: 10.1016/j.ijimpeng.2020.103672
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 25 August 2020
Date of first compliant Open Access: 21 July 2021

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