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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Optimising FSW process parameters to minimise defects and maximise fatigue life in 5083-H321 aluminium alloy
Engineering Fracture Mechanics, Volume 75, No. 3-4, Year 2008
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Description
This paper presents a systematic approach to optimising FSW process parameters (tool rotational speed and feed rate) through consideration of frictional power input. Frictional power governs the tensile strength and the fatigue life in this 5083-H321 alloy through its effect on plastic flow processes in the thermo-mechanically affected zone (TMAZ) of the weld. Although, a close relationship therefore exists between tensile strength and fatigue performance, this arises from their joint dependence on the occurrence of certain defect types that are apparently specific to certain strain hardened aluminium alloys that are FS welded. These defects are related to plastic flow processes and have a strong influence on crack paths in FS welded 5083-H321 alloy. Weld residual stresses have been extensively measured using synchrotron X-ray diffraction strain scanning and are governed by heat input into the weld. There is no clear relationship between peak values of residual stresses and fatigue performance. The work indicates that rotational speed is the key parameter governing tool torque, temperature, frictional power and hence tensile strength and fatigue performance. © 2007 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Lombard, Hannalie
United Kingdom, Plymouth
University of Plymouth
South Africa, Gqeberha
Nelson Mandela University
Hattingh, Daniel Gerhardus
South Africa, Gqeberha
Nelson Mandela University
Steuwer, Axel
United Kingdom, Plymouth
University of Plymouth
France, Grenoble
European Synchrotron Radiation Facility
James, M. N.
United Kingdom, Plymouth
University of Plymouth
Statistics
Citations: 152
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1016/j.engfracmech.2007.01.026
ISSN:
00137944