AZ31镁合金激光冲击温成形实验研究
发布时间：2019-02-18 09:30
【摘要】：为了研究超高应变速率激光冲击对AZ31镁合金温成形性能的影响,采用钕玻璃脉冲激光器(脉冲宽度为20 ns,激光功率密度为1.53 GW/cm2)进行AZ31镁合金薄板室温激光冲击成形(LSF)和200℃时激光冲击温成形(WLSF)实验研究及模拟分析。结果表明:AZ31交叉轧制薄板具有良好的超高应变速率WLSF能力,可实现温成形和改性双重效应,表层形成高幅残余压应力和高密度位错,WLSF表面比LSF具有更稳定的残余压应力,超高应变速率激光冲击和动态再结晶可能是纳米晶形成的主要原因,并分析LSF和WLSF试样表面形貌和粗糙度以及表面残余应力分布。
[Abstract]:In order to study the effect of ultra-high strain rate laser shock on the temperature-forming performance of AZ31 magnesium alloy, a pulse laser with a pulse width of 20 ns was used. Laser shock forming (LSF) and laser shock temperature forming (WSF) in AZ31 magnesium alloy sheet at room temperature (LSF) and 200 鈩，
本文编号：2425720
[Abstract]:In order to study the effect of ultra-high strain rate laser shock on the temperature-forming performance of AZ31 magnesium alloy, a pulse laser with a pulse width of 20 ns was used. Laser shock forming (LSF) and laser shock temperature forming (WSF) in AZ31 magnesium alloy sheet at room temperature (LSF) and 200 鈩，
本文编号：2425720
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