Investigation of Quench Sensitivity of an Al-7.5Zn-1.7Mg-1.4Cu-0.12Zr Alloy
Investigation of Quench Sensitivity of an Al-7.5Zn-1.7Mg-1.4Cu-0.12Zr Alloy
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DOI：
10.4028/www.scientific.net/msf.706-709.431
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发表时间：
2012-01
期刊：
影响因子：
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通讯作者：
B. Xiong;Xi Wu Li;Y. Zhang;Zhi Li;B. Zhu;Feng Wang;H. Liu
中科院分区：
文献类型：
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作者：
B. Xiong;Xi Wu Li;Y. Zhang;Zhi Li;B. Zhu;Feng Wang;H. Liu
本文通过温度-时间-性能（TTP）曲线和透射电镜分析，研究了Al-7.5Zn-1.7Mg-1.4Cu-0.12Zr合金的淬火敏感性，并与传统的AA 7 B 04和AA 7150合金进行了比较。结果表明，AA 7150和AA 7 B 04的TTP曲线的鼻端温度和相应的孕育期分别为290°C/4.5s、320°C/2.6s和335°C/0.1s，在三种合金中，AA 7150的鼻端温度最低，达到鼻端温度的临界时间最长。这表明该合金具有较低的淬火敏感性。进一步的TEM分析表明，随着在刀尖温度下保温时间的延长，淬火诱导析出现象变得明显。
In the present work, quench sensitivity of an Al-7.5Zn-1.7Mg-1.4Cu-0.12Zr alloy is investigated by temperature-time-property (TTP) curve and TEM analysis, comparing with traditional AA 7B04 and AA 7150. The results indicate that the nose temperature of TTP curve and the corresponding incubation period of the alloy, AA 7150 and AA 7B04 are about 290°C/4.5s, 320°C/2.6s and 335°C/0.1s, respectively, The nose temperature of the alloy is the lowest among three alloys and the critical time at the nose temperature is the longest for the alloy, which is obvious that the alloy has lower quench sensitivity. Further TEM analysis shows that, with the prolongation of keeping time at the nose temperature, quench-induced precipitation phenomenon becomes obvious.