Mechanism of improvement on fatigue life of metal by laser-excited shock waves

Mechanical properties and residual stresses changing on 00Cr12 alloy by nanoseconds laser shock processing at high temperatures

“…In addition, compressive stresses are not stable in the elevated temperatures and plastic deformations of service conditions. However, the residual compressive stress does not have enough time to release during the high-temperature tensile process, so it will balance the tension in the process of tensile stress [1,2]. Therefore, LSP will be beneficial to enhance the yield strength and the tensile strength of 00Cr12 alloy.…”

“…Laser shock processing (LSP) is a new surface modification technology which generates high strength impact wave and then introduces compressive residual stress of several hundreds MPa by exposing metallic samples to high power density (GW/cm 2 ), short pulse (ns level) laser beam [1][2][3][4][5][6], as shown in Fig. 1.…”

Effects of laser shock processing on mechanical properties of Fe–Ni alloy

“…[4][5][6][7][8]. Zhang et al [9][10][11][12][13] have observed the effects of laser shock-induced high-intensity stress waves on the hardness, fatigue resistance and microstructure in the laser heat affected zone of metals. However, less information related to the distribution of the nano-hardness; elastic modulus has been given.…”

Effects on mechanical properties in electron beam welding of TC4 alloy by laser shock processing

“…Laser shock processing radiates metals by high power density (GW/cm 2 ), short pulse (ns level) laser beam to produce the high strength impact wave and become residual stress of several hundreds MPa, accordingly, it is a new technology for improving the metal material performances. Now it is already extensively applied in the transformation of the material surface [4][5][6][7][8], such as increasing the hardness, wear resistance and corrosion resistance, etc. of the material surface.…”