J Mater Sci Technol ›› 2003, Vol. 19 ›› Issue (05): 402-404.

• Research Articles • Previous Articles     Next Articles

Laser Shock Processing of an Austenitic Stainless Steel and a Nickel-base Superalloy

Huaming WANG, Xijun SUN, Xiaoxuan LI   

  1. Laboratory of Laser Materials Processing and Surface Engineering, School of Materials Science and Engineering, Beihang University (formerly Beijing University of Aeronautics and Astronautics), Beijing 100083, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-09-28 Published:2009-10-10
  • Contact: Huaming WANG

Abstract: An austenitic stainless steel 1Cr18Ni9Ti and a solid solution-strengthened Ni-base superalloy GH30 were shock processed using a Q-switched pulsed Nd-glass laser. Microstructure, hardness and residual stress of the laser shock processed surface were investigated as functions of laser processing parameters. Results show that high density of dislocations and fine deformation twins are produced in the laser shock processed surface layers in both the austenitic stainless steel and the nickel-base superalloy. Extensive strain-induced martensite was also observed in the laser shock processed zone of the austenitic steel. The hardness of the laser shock processed surface was significantly enhanced and compressive stress as high as 400 MPa was produced in the laser shock processed surface.

Key words: Laser shock processing, Austenitic stainless steel, Nickel-base superalloy, ...