| Al-4Cu-1.3Mg-0.9Si合金的析出强化行为 |
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| 引用本文： | 曾延琦,王锋,熊柏青,张永安,李锡武,李志辉,刘红伟.Al-4Cu-1.3Mg-0.9Si合金的析出强化行为[J].航空材料学报,2012,32(3):1-4. |
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| 作者姓名： | 曾延琦 王锋 熊柏青 张永安 李锡武 李志辉 刘红伟 |
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| 作者单位： | 北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京,100088 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 通过硬度测试、差示扫描量热法(DSC)分析、拉伸性能测试和透射电镜(TEM)微观组织观察,研究了Al-4Cu-1.3Mg-0.9Si合金的析出强化行为。结果表明:合金具有较强的析出强化能力;合金在160～220℃下时效,随时效温度的升高,合金的时效响应速率加快,时效峰值硬度有所下降;合金在190℃时效态时,其主要析出相为S相,在190℃/24h时效态合金中还发现少量的方块状相;合金经190℃/24h时效后其常温和高温抗拉强度较同等条件下制备、同等热处理状态下的Al-4Cu-1.3Mg合金有明显的提高。
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| 关 键 词： | Al-Cu-Mg-Si合金 析出强化 微观组织 力学性能 |
Precipitation Hardening Behavior of Al-4Cu-1.3Mg-0.9Si Alloy |
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| ZENG Yan-qi
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WANG Feng
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XIONG Bai-qing
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ZHANG Yong-an
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LI Xi-wu
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LI Zhi-hui
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LIU Hong-wei.Precipitation Hardening Behavior of Al-4Cu-1.3Mg-0.9Si Alloy[J].Journal of Aeronautical Materials,2012,32(3):1-4. |
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| Authors: | ZENG Yan-qi WANG Feng XIONG Bai-qing ZHANG Yong-an LI Xi-wu LI Zhi-hui LIU Hong-wei |
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| Institution: | (State Key Laboratory for Fabrication and Processes of Nonferrous Metals,General Research Institute for Nonferrous Metals,Beijing 100088,China) |
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| Abstract: | The Precipitation hardening behavior of Al-4Cu-1.3Mg-0.9Si during the aging was investigated by hardness measurement,differential scanning calorimetry(DSC) analyses,tensile test and microstructure analyses.The results show that the alloy exhibited a superior precipitation hardening ability.The aging response rate was greatly accelerated with elevating the aging temperature from 160℃ to 220℃,and the peak hardness was remarkably decreased.The major strengthening precipitates of the alloy aging at 190 ℃ was the S phase.After ageing at 190℃ for 24h,the precipitates of the alloy were S phase with a small amount of cubic phase.Comparing with Al-4Cu-1.3Mg alloy prepared under the same conditions,the Al-4Cu-1.3Mg-0.9Si alloy exhibited superior tensile strengths at room and elevated temperature. |
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| Keywords: | Al-Cu-Mg-Si alloy precipitation hardening microstructure mechanical properties |
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