2196铝锂合金重固溶-时效组织与性能研究

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英文篇名：Study on Microstructure and Mechanical Properties of 2196 Al-Li Alloy during Re-aging and Re-solution 作者：高恩志 ; 段文科 ; 陈文超 ; 宋峰 ; 刘春忠 英文作者：GAO Enzhi;DUAN Wenke;CHEN Wenchao;SONG Feng;LIU Chunzhong;School of material science and engineering, Shenyang Aerospace University;Academy of Aerospace Propulsion Technology, China Aerospace Science and Technology Corporation; 关键词：2196铝锂合金 ; 重固溶 ; 再时效 ; 组织 ; 性能 英文关键词：2196 Al-Li alloy;;re-solution;;re-aging;;microstructure;;mechanical property 中文刊名：SJGY 英文刊名：Hot Working Technology 机构：沈阳航空航天大学材料科学与工程学院;中国航天科技集团公司航天推进技术研究院; 出版日期：2018-01-30 15:56 出版单位：热加工工艺 年：2018 期：v.47;No.480 基金：国家自然科学基金资助项目(51405310);; 辽宁省自然科学基金资助项目(201602554) 语种：中文; 页：SJGY201802063 页数：4 CN：02 ISSN：61-1133/TG 分类号：236-238+244

摘要

基于2196-T8511铝锂合金,对其进行重固溶-再时效处理,研究时效时间对其力学性能与组织演化的影响。结果表明:重固溶处理后的晶界清晰。再采用适当的温度和时间进行时效处理,合金可以回复到原始态的力学性能。2196铝锂合金的重新固溶-再时效析出相包括T1相(Al_2Cu Li)、δ'相(Al_3Li)和θ'相(Al_2Cu);较短时效时间可形成较多δ'相和θ'相。随着时效时间的延长,T1相逐渐增多,δ'相和θ'相减少;重新固溶-时效后,断口韧窝增加,仍以分层断裂为主。
        Based on 2196-T8511 Al-Li alloy, the effects of aging time on the mechanical properties and microstructure evolution during re-aging and re-solution were investigated. The results show that, the grain boundary after re-solution is clear.The mechanical properties can recover to the original state by using appropriate re-aging temperature and time. The intragranular precipitates include T1(Al_2 Cu Li), δ'(Al_3 Li) and θ'(Al_2 Cu). Re-aging for shorter time, more δ' and θ' precipitates are formed. With the aging time increaing, T1 precipitates increase, but θ' and δ' precipitates decrease. After re-solution and aging, the dimples of fracture increase and delamination fracture is dominant.

引文

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