有色金属材料与工程2024，Vol.45Issue(6)：94-101,8.DOI:10.13258/j.cnki.nmme.20230303001
时效处理对竹节晶组织CuAlMn合金丝力学性能影响
Effect of aging treatment on mechanical properties of bamboo-liked crystalline CuAlMn alloy wires
摘要
Abstract
The effect of bamboo-liked crystalline CuAlMn alloy wires with 0.5 mm diameter aged at 300℃ for different times on the Vickers hardness,microstructure and cyclic tensile properties were investigated.As the aging time increases,the β-phase structure decreases,and 6-layer monoclinic structure bainite coherent with austenite was formed at the same time,and forming a network structure.Bainite volume fraction increases from 0 to 90％.The precipitation of strengthening phase significantly increases the Vickers hardness of the alloy wire from 223 to 381.In the process of cyclic loading and unloading,as the aging time increases,the strength of alloy wire increased and the superelastic properties gradually decreased.Under the cyclic stretching with continuous accumulation of 2.0％strain,the sample aged at 300℃for 30 min could fully recover after 4 cycles to 8.0％strain,the residual strain is 0,the superelastic strain reached 7.3％exhibited great superelastic properties,and the phase transition critical stress reached 353 MPa.关键词
Cu-Al-Mn/竹节晶/时效热处理/超弹性Key words
Cu-Al-Mn/bamboo-liked crystal/aging treatment/superelasticity分类
矿业与冶金引用本文复制引用
温环屹,朱茂源,张柯,金明江..时效处理对竹节晶组织CuAlMn合金丝力学性能影响[J].有色金属材料与工程,2024,45(6):94-101,8.基金项目
国家自然科学基金资助项目(51971148) （51971148）
