【摘 要】
：
采用Nd∶YAG固体激光器在连续激光能量输入方式下对Inconel 718镍基超耐热合金进行表面激光处理,研究了激光处理工艺参数对该合金的微观组织、表面残余应力状态及疲劳性能的
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采用Nd∶YAG固体激光器在连续激光能量输入方式下对Inconel 718镍基超耐热合金进行表面激光处理,研究了激光处理工艺参数对该合金的微观组织、表面残余应力状态及疲劳性能的影响.结果表明:合金经激光处理后,原基体内弥散分布的γ″强化相及晶间片状δ相会溶解于基体γ相内,使得合金表面硬度下降,下降幅度约为50%;经低角度XRD检测,x、y方向表面残余应力均为拉应力;经激光处理的带缺口试样疲劳强度低于母材.
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