The Library
The impact of Adjustable-Ring-Mode (ARM) laser beam on the microstructure and mechanical performance in remote laser welding of high strength aluminium alloys
Tools
Sun, Tianzhu, Mohan, Anand, Liu, Conghui, Franciosa, Pasquale and Ceglarek, Dariusz (2022) The impact of Adjustable-Ring-Mode (ARM) laser beam on the microstructure and mechanical performance in remote laser welding of high strength aluminium alloys. Journal of Materials Research and Technology, 21 . pp. 2247-2261. doi:10.1016/j.jmrt.2022.10.055 ISSN 2238-7854.
|
PDF
WRAP-impact-Adjustable-Ring-Mode-(ARM)-laser-beam-microstructure-mechanical-performance-remote-laser-welding-high-strength-aluminium-alloys-2022.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (6Mb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.jmrt.2022.10.055
Abstract
This paper introduced the use of an adjustable-ring-mode (ARM) laser beam to optimise the microstructure and mechanical performance of laser welded 6xxx high-strength aluminium alloy joints. A remote laser welding system equipped with transverse beam oscillation was employed and welding parameters, including the beam oscillation width and core/ring power ratio of the ARM laser beam, were investigated sequentially. Results showed that the core/ring power ratio at a constant total power has a limited control on the weld geometry when integrated with beam oscillation. Increasing the beam oscillation width, up to 2.5 mm, resulted in a wider weld interface and a threshold value of 3.1 mm was determined to activate the transition from interface failure to the fusion boundary failure subjected to tensile lap shear loading, leading to a significant improvement in the joint strength from 170 N/mm to 277 N/mm. Furthermore, results revealed that proper selection of core/ring power ratio at a constant total power can restrict the formation of columnar grains near the interface between two plates, resulting in grain refinement within the weld zone. Both extremely high power ratio, for example core alone mode (infinite power ratio) and extremely low power ratio, e.g. ring alone mode (zero power ratio), lead to a low thermal gradient and cooling rate at the solidification front. A compromised solution which balances the wider formation of equiaxed dendrites and better grain refinement was determined at the power ratio of 0.33, translating to the improvement in joint strength up to 400 N/mm.
Item Type: | Journal Article | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Subjects: | Q Science > QC Physics 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 , Remote sensing -- Mathematical models, Heat -- Transmission | |||||||||||||||
Journal or Publication Title: | Journal of Materials Research and Technology | |||||||||||||||
Publisher: | Elsevier | |||||||||||||||
ISSN: | 2238-7854 | |||||||||||||||
Official Date: | November 2022 | |||||||||||||||
Dates: |
|
|||||||||||||||
Volume: | 21 | |||||||||||||||
Page Range: | pp. 2247-2261 | |||||||||||||||
DOI: | 10.1016/j.jmrt.2022.10.055 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||
Date of first compliant deposit: | 21 December 2022 | |||||||||||||||
Date of first compliant Open Access: | 21 December 2022 | |||||||||||||||
RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year