【摘要】 对奥氏体不锈钢１ Ｃｒ１８ Ｎｉ９ Ｔｉ 进行激光冲击强化，观察了激光冲击强化层显微组织与结构的变化并测定了激光冲击强化层内的显微硬度和残余应力。结果表明：１ Ｃｒ１８ Ｎｉ９ Ｔｉ 激光冲击强化层中有高密度的位错和大量的孪晶，显微硬度显著提高并产生较高的残余压应力，１ Ｃｒ１８ Ｎｉ９ Ｔｉ 激光冲击强化区还发生了形变诱发马氏体相变。更多还原

【Abstract】 Austenitic stainless steel 1Cr18Ni9Ti was shock processed by high intensity pulse laser irradiation.Microstructure of the laser shock processed surface was characterized and micro hardness and residual stress were measured.Test results show that there are high densities of dislocations and twins in the laser shock processed zone, resulting in formation of compressive residual stress and enhancement of hardness in this area. Strain induced martensite was also observed in the laser shock processed 1Cr18Ni9Ti surface.更多还原