2A12鋁合金的熱壓縮行為及熱加工圖
發(fā)布時間:2018-10-05 18:46
【摘要】:采用Gleeble-1500熱模擬試驗機對2A12鋁合金進行了單向熱壓縮變形試驗,研究了其在變形溫度為320~480℃,應(yīng)變速率為0.0003~1 s~(-1)條件下的熱變形行為,建立了基于動態(tài)材料模型的功率耗散效率因子η圖,并對熱加工圖進行了組織驗證。結(jié)果表明:合金的流變應(yīng)力隨著變形溫度的升高和應(yīng)變速率的降低而降低,在高溫區(qū)變形機制為動態(tài)回復(fù),在低溫區(qū)變形機制為動態(tài)再結(jié)晶,主要與合金變形過程中的析出相有關(guān);隨著應(yīng)變量的增大,峰區(qū)的η值逐漸升高;當(dāng)真應(yīng)變?yōu)?.2時,在變形溫度為440℃,應(yīng)變速率為0.1 s~(-1)時,η達到峰值且為48%,合金發(fā)生了動態(tài)再結(jié)晶,晶粒細(xì)化且無內(nèi)裂紋。該結(jié)果為2A12鋁合金實際熱加工工藝的優(yōu)化提供了理論依據(jù)。
[Abstract]:The unidirectional hot compression deformation test of 2A12 aluminum alloy was carried out by using Gleeble-1500 thermal simulator. The thermal deformation behavior of 2A12 aluminum alloy was studied under the condition of 320 ~ 480 鈩,
本文編號:2254472
[Abstract]:The unidirectional hot compression deformation test of 2A12 aluminum alloy was carried out by using Gleeble-1500 thermal simulator. The thermal deformation behavior of 2A12 aluminum alloy was studied under the condition of 320 ~ 480 鈩,
本文編號:2254472
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