【摘要】：分別對完全退火態(tài)和固溶淬火態(tài)2219鋁合金板材進(jìn)行準(zhǔn)靜態(tài)成形條件和電磁成形條件下的單向拉伸實(shí)驗(yàn)、平面應(yīng)變實(shí)驗(yàn)和雙向拉伸實(shí)驗(yàn),建立了2219鋁合金的成形極限圖并研究了不同熱處理狀態(tài)下成形速率對2219鋁合金成形極限的影響規(guī)律。結(jié)果表明,固溶淬火會(huì)顯著提高2219鋁合金的強(qiáng)度,降低2219鋁合金的斷后伸長率;準(zhǔn)靜態(tài)成形條件下,完全退火態(tài)2219鋁合金在以上三種典型應(yīng)變狀態(tài)下的極限應(yīng)變比固溶淬火態(tài)2219鋁合金分別高14.76%、37.98%、39.54%;電磁成形條件下,完全退火態(tài)2219鋁合金在以上三種典型應(yīng)變狀態(tài)下的極限應(yīng)變比固溶淬火態(tài)2219鋁合金分別高14.51%、38.03%、33.33%;完全退火態(tài)2219鋁合金在電磁成形條件下以上三種典型應(yīng)變狀態(tài)下的極限應(yīng)變比準(zhǔn)靜態(tài)成形條件下分別高16.08%、24.38%、18.76%;固溶淬火態(tài)2219鋁合金在電磁成形條件下以上三種典型應(yīng)變狀態(tài)下的的極限應(yīng)變比準(zhǔn)靜態(tài)成形條件下分別高16.34%、24.20%、30.94%,電磁成形可有效提高2219鋁合金的成形極限,改善2219鋁合金的成形性能。
[Abstract]:The uniaxial tensile test, plane strain test and biaxial tensile test of fully annealed and quenched 2219 aluminum alloy sheets under quasi-static forming conditions and electromagnetic forming conditions were carried out, respectively. The forming limit diagram of 2219 aluminum alloy was established and the influence of forming rate on the forming limit of 2219 aluminum alloy under different heat treatment conditions was studied. The results showed that the strength of 2219 aluminum alloy was significantly increased and the elongation at break of 2219 aluminum alloy was decreased by solution quenching. Under quasi-static forming conditions, the ultimate strain of fully annealed 2219 aluminum alloy is 14.76%, 37.98%, 39.54% higher than that of solid solution quenched 2219 aluminum alloy under the above three typical strain states, respectively. Under electromagnetic forming condition, the ultimate strain of fully annealed 2219 aluminum alloy is 14.51%, 38.03%, 33.33% higher than that of solid solution quenched 2219 aluminum alloy under the above three typical strain states, respectively. The ultimate strain of fully annealed 2219 aluminum alloy under electromagnetic forming is 16.08%, 24.38% and 18.76% higher than that of quasi-static forming respectively. The ultimate strain of 2219 aluminum alloy in solid solution quenched state under electromagnetic forming is 16.34%, 24.20% and 30.94% higher than that in quasi-static forming condition, respectively. Electromagnetic forming can effectively improve the forming limit of 2219 aluminum alloy and improve the forming properties of 2219 aluminum alloy.
【作者單位】： 華中科技大學(xué)材料科學(xué)與工程學(xué)院材料成形與模具技術(shù)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51575206) 國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃資助項(xiàng)目(2011CB012802) 中國航天科技集團(tuán)公司航天科技創(chuàng)新基金資助項(xiàng)目(CASC150704) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(2016YXZD055)
【分類號】：TG166.3;TG146.21

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