Porosity formation in laser welded ti-6al-4v alloy: modelling and validation

Chinnapat Panwisawas, Bama Perumal, Yogesh Sovani, Richard P Turner, R. Mark Ward, Jeffery W. Brooks, Hector C Basoalto

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

Abstract

The presence of porosity inherited from a fusion welding operation degrades the mechanical properties of components during performance such as fatigue life. In this study, a physicsbased model including heat transfer, fluid flow, interfacial processes and microstructure prediction via cellular automata has been developed and used to simulate porosity formation during laser welding of Ti-6Al-4V titanium alloy. The model results are compared with: measurements of porosity from welded samples using X-ray tomography; optical images; texture measurement via EBSD and neutron diffraction. These are used to provide a better understanding of the relationship between process parameters, component microstructure and weld integrity.
Original languageEnglish
Title of host publicationProceedings of the 13th World Conference on Titanium
Editors Vasisht Venkatesh, Adam L. Pilchak, John E. Allison, Sreeramamurthy Ankem, Rodney Boyer, Julie Christodoulou, Hamish L. Fraser, M. Ashraf Imam, Yoji Kosaka, Henry J. Rack, Amit Chatterjee, Andy Woodfield
PublisherWiley
Chapter317
Pages1897-1900
Number of pages4
ISBN (Electronic)9781119296126
ISBN (Print)9781119293668
DOIs
Publication statusPublished - 2 May 2016
Externally publishedYes
Event13th World Conference on Titanium - San Diego, United States
Duration: 16 Aug 201520 Aug 2015
Conference number: 13th
https://www.tms.org/meetings/2015/Ti2015/home.aspx#.XZWi4vlKiUk

Conference

Conference13th World Conference on Titanium
CountryUnited States
CitySan Diego
Period16/08/1520/08/15
Internet address

Keywords

  • Processing-induced porosity
  • Laser welding
  • Titanium alloys
  • Keyhole modelling

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    Panwisawas, C., Perumal, B., Sovani, Y., Turner, R. P., Ward, R. M., Brooks, J. W., & Basoalto, H. C. (2016). Porosity formation in laser welded ti-6al-4v alloy: modelling and validation. In V. Venkatesh, A. L. Pilchak, J. E. Allison, S. Ankem, R. Boyer, J. Christodoulou, H. L. Fraser, M. A. Imam, Y. Kosaka, H. J. Rack, A. Chatterjee, ... A. Woodfield (Eds.), Proceedings of the 13th World Conference on Titanium (pp. 1897-1900). Wiley. https://doi.org/10.1002/9781119296126.ch317