The mechanisms of thermal engineered laser shock peening for enhanced fatigue performance

Warm laser shock peening without coating induced phase transformations and pinning effect on fatigue life of low-alloy steel

“…The optimum working temperature for dual phase spring steel was evaluated for shot peening process [16][17]. The thermal engineering based warm laser shock peening (WLSP) has advantages such as dynamic strain aging (DSA), and dynamic precipitation (DP) hardening of low-alloy steel which contributes an extensive improvement in fatigue life cycle [14,[18][19][20]51,52]. LSPwC method of producing high compressive RS works efficiently with low energy lasers.…”

Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere

“…For friction welding, the low efficiency and welding defects are concerning. Alternatively, highpower-density laser has attracted enormous research interest and found its wide application in a broad branch of manufacturing areas including selective laser sintering and three-dimensional printing [1][2][3][4][5][6], surface nanostructuring [7][8][9][10][11][12], multimaterial joining and integration [13][14][15][16][17], material removal [18,19], and mechanical/optical property enhancements [20][21][22][23]. Characteristics, such as contact-free processing, good flexibility and tunablity, high efficiency, and throughput, make laser a feasible route for welding of 42CrMo [24,25].…”

Deformation feature and properties of Zr based bulk metallic glass treated by laser shock peening

“…6,7 Similar to but having more advantages over shot peening, laser shock peening (LSP) has been widely used to improve wear resistance and fatigue performance in metallic materials. [8][9][10] In the LSP process, a shock wave is generated and propagates into the target through the interaction of a pulsed high intensity laser beam and absorption layer on the metallic target surface. Laser shock peening appears to achieve a much greater depth of residual stress (typical on the order of 1-2 mm) than conventional shot peening (less than 0?25 mm).…”