【摘要】：為了探明2124合金的淬火后室溫停留效應對合金力學性能的影響并找到應對措施,運用拉伸試驗、硬度試驗、電導率測試、DSC測試、XRD實驗、EDS、TEM實驗手段對2124合金淬火后室溫停留不同時間的力學性能、相變過程及顯微組織進行分析。結(jié)果表明:合金淬火后室溫停留降低2124合金隨后185℃人工時效的峰值強度,屈服強度最大降低60 MPa,伸長率略有升高,但低于1.5%;室溫停留階段合金內(nèi)部析出物為GPB區(qū),并且位錯密度降低;室溫停留24 h后185℃人工時效階段主要強化相S相的析出激活能由淬火后直接時效的56.8k J/mol上升至72.7 k J/mol,室溫停留階段位錯密度的降低抑制了S相的非均勻析出是導致S相析出激活能升高的原因之一;在淬火后對材料進行3%冷變形即可消除室溫停留對2124合金強度、硬度帶來的不利影響。
[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，

本文編號：2495953