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Processing Maps for Controlling Microstructure of an Aircraft 2E12 Aluminum Alloy
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Processing Maps for Controlling Microstructure of an Aircraft 2E12 Aluminum Alloy
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Supported by National Natural Science Foundation of China (50871123); the China-Australia Science and Technology Cooperation Fund (51011120052)

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    摘要:

    采用能量消耗加工圖研究2E12鋁合金熱壓縮過程中的變形行為及其微觀組織演變，且建立能量消耗效率與微觀組織演變的關(guān)系。壓縮變形溫度范圍為250~500 °C，應(yīng)變速率范圍為0.01~10 s-1，總真應(yīng)變量為0.5。結(jié)果表明，加工圖中存在2個動態(tài)回復(fù)區(qū)域：(1) 325~400 °C，0.01~0.03 s-1，(2) 350~450 °C，1.78~10 s-1。當溫度高于450 °C時，2E12合金發(fā)生部分動態(tài)再結(jié)晶現(xiàn)象，且動態(tài)再結(jié)晶體積分數(shù)隨變形溫度的升高而增大，但是當溫度為500 °C，應(yīng)變速率為1~10 s-1時，2E12合金發(fā)生了第二相粒子回溶和沿晶開裂的現(xiàn)象。

    Abstract:

    The deformation behavior and microstructure evolution in a hot compressed 2E12 alloy was investigated by constructing power dissipation map in which work efficiency can be related with microstructure evolution. Compression tests were performed in the temperature range of 250-500 °C and the strain rate ranging from 0.01 s-1 to 10 s-1 up to a true strain of 0.5. The processing maps reveal that two domains where dynamic recovery occurs comparatively: (1) 325-400 °C and 0.01-0.03 s-1, (2) 350-450 °C and 1.78-10 s-1, and partial dynamic recrystallization occurs at T≥450 °C. However, there also is evidence of redissolution of the particles and intercrystalline cracks at 500 °C and 1-10 s-1. It is shown that the volume of partial recrystallization increase with increasing of deformation temperature.

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黃裕金,陳志國. Processing Maps for Controlling Microstructure of an Aircraft 2E12 Aluminum Alloy[J].稀有金屬材料與工程,2012,41(5):757~761.[Huang Yujin, Chen Zhiguo. Processing Maps for Controlling Microstructure of an Aircraft 2E12 Aluminum Alloy[J]. Rare Metal Materials and Engineering,2012,41(5):757~761.]
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  • 收稿日期:2011-05-18
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