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分别对完全退火态和固溶淬火态2219铝合金板材进行准静态成形条件和电磁成形条件下的单向拉伸实验、平面应变实验和双向拉伸实验,建立了2219铝合金的成形极限图并研究了不同热处理状态下成形速率对2219铝合金成形极限的影响规律。结果表明,固溶淬火会显著提高2219铝合金的强度,降低2219铝合金的断后伸长率;准静态成形条件下,完全退火态2219铝合金在以上三种典型应变状态下的极限应变比固溶淬火态2219铝合金分别高14.76%、37.98%、39.54%;电磁成形条件下,完全退火态2219铝合金在以上三种典型应变状态下的极限应变比固溶淬火态2219铝合金分别高14.51%、38.03%、33.33%;完全退火态2219铝合金在电磁成形条件下以上三种典型应变状态下的极限应变比准静态成形条件下分别高16.08%、24.38%、18.76%;固溶淬火态2219铝合金在电磁成形条件下以上三种典型应变状态下的的极限应变比准静态成形条件下分别高16.34%、24.20%、30.94%,电磁成形可有效提高2219铝合金的成形极限,改善2219铝合金的成形性能。
The forming limit of 2219 aluminum alloy was established for the fully annealed and solution-quenched 2219 aluminum alloy sheets under the conditions of quasi-static forming and electromagnetic forming under uniaxial tensile test, plane strain test and biaxial tensile test The influence of forming rate on the forming limit of 2219 aluminum alloy under different heat treatment conditions was studied. The results show that solution-quenching can significantly increase the strength of 2219 aluminum alloy and reduce the elongation at break of 2219 aluminum alloy. Under quasi-static forming conditions, the ultimate strain ratio of fully annealed 2219 aluminum alloy under the above three typical strain states 2219 aluminum alloy in solution quenched state are respectively 14.76%, 37.98% and 39.54% higher than those in the untreated 2219 aluminum alloy. Under electromagnetic forming condition, the ultimate strain of fully annealed 2219 aluminum alloy in the above three typical strain states is 14.51% %, 38.03% and 33.33% respectively. The ultimate strain of fully annealed 2219 aluminum alloy is 16.08%, 24.38% and 18.76% higher than that under quasi-static forming under the above three typical strain states respectively. Under the condition of electromagnetic forming, the ultimate strain of 2219 aluminum alloy is 16.34%, 24.20% and 30.94% higher than that under quasi-static forming condition respectively. Electromagnetic forming can effectively increase the forming limit of 2219 aluminum alloy and improve 2219 Formability of aluminum alloy.