Influence Of Thermal And Mechanical Laser Surface Treatments On The Pitting Corrosion Resistance Of AISI 316L Steel.
Price
Free (open access)
Transaction
Volume
33
Pages
10
Published
2001
Size
1,137 kb
Paper DOI
10.2495/SURF010231
Copyright
WIT Press
Author(s)
P. Peyre, C. Carboni, G. Beranger & C. Lemaitre
Abstract
Influence of thermal and mechanical laser surface treatments on the pitting corrosion resistance of AISI 316L steel t P.Peyre, * C.Carboni, ^ G.Beranger & ^ C.Lemaitre Abstract Laser-shock peening (LSP) and laser surface melting (LSM) have been carried out on 316L steel using pulsed YAG and continuous wave (cw) diode lasers, with objective to modify the localised corrosion properties in NaCl 0.05 M saline environment. LSP at 7-20 10^ W/cnf generates a pure plastic deformation microstructure with deformation bands, compressive residual stresses and a work-hardening of the surface, without chemical modifications or phase transformations. After LSM at 2.5.10^ W/cnf, the surface is refined and undergoes 10 % 5 ferrite transformation during cooling, with microsegregation of Cr and Ni between dendrite cores and dendrite arm spacing (DAS). More, after LSM, most of the surface inclusions (Ca, Si, Al, Mn aggregates) are remelted. Both treatments drive to enhanced corrosion pr
Keywords