2124合金淬火后的室温停留效应
发布时间：2019-06-09 22:48
【摘要】：为了探明2124合金的淬火后室温停留效应对合金力学性能的影响并找到应对措施,运用拉伸试验、硬度试验、电导率测试、DSC测试、XRD实验、EDS、TEM实验手段对2124合金淬火后室温停留不同时间的力学性能、相变过程及显微组织进行分析。结果表明:合金淬火后室温停留降低2124合金随后185℃人工时效的峰值强度,屈服强度最大降低60 MPa,伸长率略有升高,但低于1.5%;室温停留阶段合金内部析出物为GPB区,并且位错密度降低;室温停留24 h后185℃人工时效阶段主要强化相S相的析出激活能由淬火后直接时效的56.8k J/mol上升至72.7 k J/mol,室温停留阶段位错密度的降低抑制了S相的非均匀析出是导致S相析出激活能升高的原因之一;在淬火后对材料进行3%冷变形即可消除室温停留对2124合金强度、硬度带来的不利影响。
[Abstract]:In order to find out the effect of room temperature residence effect on the mechanical properties of 2124 alloy after quenching and find out the countermeasures, tensile test, hardness test, conductivity test, DSC test, XRD test, EDS, test were used. The mechanical properties, phase transformation process and microstructure of 2124 alloy after quenching at room temperature were analyzed by TEM. The results show that the peak strength of 2124 alloy and then artificial aging at 185 鈩，
本文编号：2495953
[Abstract]:In order to find out the effect of room temperature residence effect on the mechanical properties of 2124 alloy after quenching and find out the countermeasures, tensile test, hardness test, conductivity test, DSC test, XRD test, EDS, test were used. The mechanical properties, phase transformation process and microstructure of 2124 alloy after quenching at room temperature were analyzed by TEM. The results show that the peak strength of 2124 alloy and then artificial aging at 185 鈩，
本文编号：2495953
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2495953.html
