放大自发辐射对激光冲击处理7050铝合金的影响

 利用高功率钕玻璃激光器对7050铝合金表面进行了冲击处理，保持泵浦功率不变，用压电传感器和示波器测试了激光冲击产生的压力波形，用X射线应力测量仪测量了激光冲击后铝合金表面的残余应力，并用非接触式光学轮廓仪分析了激光冲击后铝合金的表面形貌，研究了放大自发辐射强度对激光冲击处理7050铝合金冲击压力、残余应力和粗糙度影响的微观机理。研究结果表明:在泵浦功率不变前提下，放大自发辐射强度的增大降低了激光冲击波压力，铝合金表面残余压应力也随之降低，同时铝合金表面粗糙度增大。

Effects of amplified spontaneous emission on laser shock processing 7050 aluminium alloy

The 7050 aluminum alloy was processed by laser shock processing(LSP) with high energy repetition rate Nd:glass laser.With unchanged pump power,pressure waveform was measured by polyvinylidene fluoride(PVDF) and the oscilloscope,the surface residual stress of 7050 aluminum alloy was measured by X-ray diffraction,surface roughness was analysed by non-contact optical profiler,the micro-mechanism of the shock pressure,the residual stress and roughness was studied after LSP.Results show that under the condition ...