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變形條件對半固態(tài)Al-4Cu-Mg合金微觀組織的影響
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TG111.4 TG146.2

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西北工業(yè)大學創(chuàng)新基金資助項目(2002-10)


Effect of the Process Parameters on Microstructure of the Semisolid Al-4Cu-Mg Alloy in the Isothermal Compression Process
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    摘要:

    研究了用應變誘發(fā)熔化激活法(SIMA)制備的半固態(tài)Al-4Cu-Mg合金在不同變形溫度、變形程度和應變速率下半固態(tài)壓縮變形時的微觀組織演變。研究結果表明：在半固態(tài)條件下，隨變形溫度的升高，晶粒平均尺寸增大，分形維數(shù)減??；變形程度增大，晶粒平均尺寸減?。中尉S數(shù)先減小后增大；應變速率增大，晶粒平均尺寸先減小后略有增大，且在小的應變速率下，晶粒平均尺寸隨應變速率變化的趨勢較大，分形維數(shù)隨著應變速率的增大而增大。

    Abstract:

    Microstructural evolution of the semisolid Al-4Cu-Mg alloy fabricated by strain induced melting activation (SIMA) at different deformation temperatures and strain rates during semisolid deforming were investigated. The experimental results show that the grain size increases with the increase of deformation temperature and decreases with the increase of height reduction. Fractal dimension decreases with the increase of deformation temperature and increases with the increase of height reduction after an early drop. Grain size decreases with the increase from 0.001 s-1 to 0.1 s-1 of strain rate, but increases slightly with the increase from 0.1 s-1 to 1 s-1 of strain rate. The lower the strain rate, the greater effect of strain rate on grain size. Fractal dimension increases with the increase of strain rate.

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黃維超 盧雅琳 江海濤 李淼泉.變形條件對半固態(tài)Al-4Cu-Mg合金微觀組織的影響[J].稀有金屬材料與工程,2005,34(5):833~836.[Huang Weichao, Lu Yalin, Jiang Haitao, Li Miaoquan. Effect of the Process Parameters on Microstructure of the Semisolid Al-4Cu-Mg Alloy in the Isothermal Compression Process[J]. Rare Metal Materials and Engineering,2005,34(5):833~836.]
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  • 最后修改日期:2003-09-23
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