[6] [6] ZHANG Y K, LU J Z, REN X D, et al．Effect of laser shock processing on the mechanical properties and fatigue lives of the turbojet engine blades manufactured by LY2 aluminum alloy[J]．Materials and Design, 2009, 30(5): 1697-1703．

[7] [7] GANESH P, SUNDAR R, KUMAR H, et al．Studies on laser peening of spring steel for automotive applications[J]．Optics and Lasers in Engineering, 2012(50): 678-686．

[11] [11] TODINOV M T．Maximum principal tensile stress and fatigue crack origin for compression springs[J]．International Journal of Mechanical Sciences, 1999(41): 357-370．

[12] [12] MATEJICEK J, BRAND P C, DREWS A R, et al．Residual stresses in cold-coiled helical compression springs for automotive suspensions measured by neutron diffraction[J]．Materials Science and Engineering A, 2004(367): 306-311．

[15] [15] JIN YUZHE．The bonding of ceramic and metal[J]．Transaction of Japan Welding Institute, 1993, 11(3): 66-71．