eprintid: 18627
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/86/27
datestamp: 2024-06-04 14:10:58
lastmod: 2024-06-04 14:10:58
status_changed: 2024-06-04 14:03:44
type: article
metadata_visibility: show
creators_name: Janga, V.S.R.
creators_name: Awang, M.
creators_name: Pedapati, S.R.
title: A Numerical Study on the Effect of Tool Speeds on Temperatures and Material Flow Behaviour in Refill Friction Stir Spot Welding of Thin AA7075-T6 Sheets
ispublished: pub
keywords: Flow velocity; Friction; Friction stir welding; Shear flow; Spot welding; Thermal cycling; Welds, Friction stir spot welding; Joining process; Material Flow; Refill friction stir spot welding; Rotational speed; Simulation of joining process; Thermal; Thermal cycle; Thermo-mechanical characteristics, Numerical models
note: cited By 2
abstract: A three-dimensional (3D) numerical model was created to simulate and analyze the effect of tool rotational speeds (RS) and plunge rate (PR) on refill friction stir spot welding (refill FSSW) of AA7075-T6 sheets. The numerical model was validated by comparing the temperatures recorded at a subset of locations with those recorded at the exact locations in prior experimental studies from the literature. The peak temperature at the weld center obtained from the numerical model differed by an error of 2.2. The results showed that with the rise in RS, there was an increase in weld temperatures, effective strains, and time-averaged material flow velocities. With the rise in PR, the temperatures and effective strains were reduced. Material movement in the stir zone (SZ) was improved with the increment of RS. With the rise in PR, the top sheet�s material flow was improved, and the bottom sheet�s material flow was reduced. A deep understanding of the effect of tool RS and PR on refill FSSW joint strength were achieved by correlating the thermal cycles and material flow velocity results obtained from the numerical models to the lap shear strength (LSS) from the literature. © 2023 by the authors.
date: 2023
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85156160058&doi=10.3390%2fma16083108&partnerID=40&md5=3885e927184589276210086422424707
id_number: 10.3390/ma16083108
full_text_status: none
publication: Materials
volume: 16
number: 8
refereed: TRUE
citation:   Janga, V.S.R. and Awang, M. and Pedapati, S.R.  (2023) A Numerical Study on the Effect of Tool Speeds on Temperatures and Material Flow Behaviour in Refill Friction Stir Spot Welding of Thin AA7075-T6 Sheets.  Materials, 16 (8).