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應(yīng)力/電場耦合作用對2524鋁合金時效動力學(xué)影響
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國家自然科學(xué)基金資助 (51071177)；國家重點(diǎn)基礎(chǔ)研究發(fā)展計劃（“973”計劃）(2012CB619506)；有色金屬先進(jìn)結(jié)構(gòu)材料與制造協(xié)同創(chuàng)新中心


Effect of Stress Coupled with Electric Field on Aging Dynamics of
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    摘要:

    采用差熱分析儀（DSC）、透射電子顯微鏡（TEM）等分析手段，研究應(yīng)力/電場耦合時效后2524合金的DSC的曲線特征和微觀組織。結(jié)果表明：與無外場時效（190 ℃/5 h）樣品相比，施加25~130 MPa應(yīng)力時效后，2524鋁合金中S相析出體積分?jǐn)?shù)升高，析出速率提高30%，S相的形成激活能降低55 kJ/mol；施加130 MPa+16 kV/cm耦合外場時效后，S相激活能僅降低了38 kJ/mol

    Abstract:

    The DSC curve characteristic and microstructure of 2524 aluminum alloy after stress coupled with electric field aging were investigated using Differential Scanning Calorimetry (DSC) and transmission electron microscopy (TEM), respectively. The results show that comparing to the alloy after aging at 190 oC/5 h without either external stress or electric field, the volume fraction of precipitated S phase increases in the sample after 25~130 MPa aging, the precipitation rate is increased by 30%, and the activation energy of S phase formation is decreased by 55 kJ/mol, while that of the alloy after aging under 130 MPa coupled with 16 kV/cm is decreased by only 38 kJ/mol

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王 琪,傅 上,王 斌,易丹青.應(yīng)力/電場耦合作用對2524鋁合金時效動力學(xué)影響[J].稀有金屬材料與工程,2015,44(4):966~971.[Wang Qi, Fu Shang, Wang Bin, Yi Danqing. Effect of Stress Coupled with Electric Field on Aging Dynamics of[J]. Rare Metal Materials and Engineering,2015,44(4):966~971.]
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  • 收稿日期:2014-04-21
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  • 在線發(fā)布日期: 2015-06-08
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