Effect of laser shock peening on commercially pure titanium-1 weldment fabricated by gas tungsten arc welding technique

Sandeep Varin, Mayank Agarwal, Aditya Chugh, M. Manikandan*, S. Prabhakaran, S. Kalainathan, Pratik Shukla, Jonathan Lawrence, N. Arivazhagan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

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 - 1 Jun 2019
Externally publishedYes

Keywords

  • commercial pure titanium
  • gas tungsten arc welding
  • laser shock peening
  • residual stress

Fingerprint

Dive into the research topics of 'Effect of laser shock peening on commercially pure titanium-1 weldment fabricated by gas tungsten arc welding technique'. Together they form a unique fingerprint.

Cite this