Effect of Laser Shock Peening on Commercially Pure Titanium-1 Weldment Fabricated by Gas Tungsten Arc Welding Technique

S Varin , M Agarwal,, A. Chugh, M Manikandan, S Prabhakaran, S Kalainathan, Pratik Shukla, Jonathan Lawrence, N Arivazhagan

Research output: Contribution to journalArticle

Abstract

This research work investigates the effect of laser shock peening (LSP) on commercially pure titanium grade 1 (CP Ti-1) weldment. The welding was done using gas tungsten arc welding (GTAW) with ERTi-2 filler wire. LSP was carried out on the cap surface of the weldment. The optical microstructure showed the Widmanstatten-type martensitic structure in the fusion zone (as-welded). The LSP fusion zone showed a refined microstructure compared to that of as-welded condition. Scanning electron microscope (SEM) of LSP weldment showed the indentation on the surface of the weld. This was a result of the surface ablation that occurred during LSP. X-ray diffraction analysis showed the absence of transformation of phases in the weldment. A reduction of 14.8% of crystalline size was observed in LSP weldment. A higher compressive residual stress was observed in LSP weldment than the as-welded condition. Tensile test showed the occurrence of failure in the base metal region in the case of LSP weldment, as against the failure in the case of as-welded condition in the fusion zone.
Original languageEnglish
Pages (from-to)1569–1573
Number of pages5
JournalTransactions of the Indian Institute of Metals
Volume72
Issue number6
Early online date14 May 2019
DOIs
Publication statusPublished - Jun 2019

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Keywords

  • Commercial pure titanium
  • Gas tungsten arc welding
  • Laser shock peening
  • Residual stress

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Varin , S., Agarwal, M., Chugh, A., Manikandan, M., Prabhakaran, S., Kalainathan, S., ... Arivazhagan, N. (2019). Effect of Laser Shock Peening on Commercially Pure Titanium-1 Weldment Fabricated by Gas Tungsten Arc Welding Technique. Transactions of the Indian Institute of Metals, 72(6), 1569–1573. https://doi.org/10.1007/s12666-019-01704-1