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Effects of laser shock processing on 316L stainless steel welds

I. B.ROMAN1,* , M. H. TIEREAN1,* , J. L. OCAÑA2

Affiliation

  1. Transilvania University of Brasov, Romania,
  2. Universidad Politecnica de Madrid, Spain

Abstract

This paper presents an experimental study on the effect of laser shock processing (LSP) on mechanical properties of 316 L stainless steel welds. A Q-switched Nd: YAG laser with a 1064 nm wavelength and maximum power of 3.3 kW was used for welding. The LSP energy 2.8 J/ pulse was produced by the same laser, having a spot diameter of 1.5 mm and 10 Hz frequency. We present the results for LSP surface treatments applied with two different pulse densities, 900 pulse/cm2 and 1600 pulse/cm2 . The purpose of the work is to compare the effects on mechanical properties of untreated weld and LSP treated with both densities. The effect on microstructure was also investigated by optical microscopy. The results are discussed and plotted. The results show the advantages of LSP surface treatment..

Keywords

Laser shock processing, Laser welding, Stainless steel.

Submitted at: Feb. 7, 2013
Accepted at: Feb. 20, 2013

Citation

I. B.ROMAN, M. H. TIEREAN, J. L. OCAÑA, Effects of laser shock processing on 316L stainless steel welds, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 1-2, pp. 121-124 (2013)