【摘要】：為了研究超高應(yīng)變速率激光沖擊對(duì)AZ31鎂合金溫成形性能的影響,采用釹玻璃脈沖激光器(脈沖寬度為20 ns,激光功率密度為1.53 GW/cm2)進(jìn)行AZ31鎂合金薄板室溫激光沖擊成形(LSF)和200℃時(shí)激光沖擊溫成形(WLSF)實(shí)驗(yàn)研究及模擬分析。結(jié)果表明:AZ31交叉軋制薄板具有良好的超高應(yīng)變速率WLSF能力,可實(shí)現(xiàn)溫成形和改性雙重效應(yīng),表層形成高幅殘余壓應(yīng)力和高密度位錯(cuò),WLSF表面比LSF具有更穩(wěn)定的殘余壓應(yīng)力,超高應(yīng)變速率激光沖擊和動(dòng)態(tài)再結(jié)晶可能是納米晶形成的主要原因,并分析LSF和WLSF試樣表面形貌和粗糙度以及表面殘余應(yīng)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，

本文編號(hào)：2425720