Mechanical properties and microstructure of friction stir and laser beam welded 3mm Ti6A14V alloy

Peter M. Mashinini, Danie G. Hattingh, Hannalie Lombard

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

In this paper the authors report the study done on welded Ti-6A1-4V alloy sheets by friction stir and laser beam welding. Fusion and solid-state techniques were compared to determine the most performance favourable welding process. Welds were accomplished by varying the process traverse speed. High traverse speeds indicated increased hardness in the weld nugget and wider nugget area for laser beam as compared to FSW. Tensile strength for both processes showed similar performance to that of the parent plate. Welds from laser beam welding exhibited superior fatigue strength under tension-tension loading than friction stir welds at intermediate speeds. Microstructure was discussed to explain the effect of the process parameters on joint integrity in relation to the parent plate. Additionally, residual stresses measured in the weld nugget are explained.

Original languageEnglish
Title of host publicationWCE 2016 - World Congress on Engineering 2016
EditorsS. I. Ao, S. I. Ao, Len Gelman, S. I. Ao, Len Gelman, David W.L. Hukins, Andrew Hunter, Alexander M. Korsunsky
PublisherNewswood Limited
Pages1140-1145
Number of pages6
ISBN (Electronic)9789881404800
Publication statusPublished - 2016
EventWorld Congress on Engineering 2016, WCE 2016 - London, United Kingdom
Duration: 29 Jun 20161 Jul 2016

Publication series

NameLecture Notes in Engineering and Computer Science
Volume2224
ISSN (Print)2078-0958

Conference

ConferenceWorld Congress on Engineering 2016, WCE 2016
Country/TerritoryUnited Kingdom
CityLondon
Period29/06/161/07/16

Keywords

  • Fatigue
  • Friction stir
  • Laser beam
  • Tensile strength
  • Ti6A14V
  • Traverse speed

ASJC Scopus subject areas

  • Computer Science (miscellaneous)

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