【摘要】：通過拉伸測(cè)試和透射電鏡分析,研究了不同時(shí)效溫度下2198鋁鋰合金組織和性能的變化。結(jié)果發(fā)現(xiàn):在峰時(shí)效之前的小溫度區(qū)間內(nèi),2198鋁鋰合金對(duì)時(shí)效溫度非常敏感,經(jīng)淬火變形后在150~170℃下時(shí)效14 h,隨溫度的升高,強(qiáng)化效果顯著增加,延伸率降低;觀察到的2198合金的析出相相主要是δ′、θ′、β′/δ′、T1、σ相。不同時(shí)效溫度下得到的析出相的種類和形貌不同,160℃以下時(shí)效,析出相以δ′、θ′、β′/δ′為主,160℃以上,以T1、σ相的為主,多種相復(fù)合強(qiáng)化。時(shí)效過程中析出相的種類和含量的變化是該合金力學(xué)性能對(duì)時(shí)效溫度敏感的本質(zhì)原因。
[Abstract]:The microstructure and properties of 2198 Al-Li alloy at different aging temperatures were studied by tensile test and TEM analysis. The results show that 2198 Al-Li alloy is very sensitive to aging temperature in the small temperature range before peak aging. After quenching and deforming at 150 鈩，

本文編號(hào)：2294429