| 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. |
| 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 |
| |
| DOI：10.13258/j.cnki.nmme.20230303001 |
| 中文关键词: Cu-Al-Mn 竹节晶 时效热处理 超弹性 |
| 英文关键词:Cu-Al-Mn bamboo-liked crystal aging treatment superelasticity |
| 基金项目:国家自然科学基金资助项目（51971148） |
|
| 摘要点击次数: 2 |
| 全文下载次数: 35 |
| 中文摘要: |
| 研究了竹节晶组织CuAlMn合金丝在300 ℃时效不同时间对直径0.5 mm的竹节晶组织Cu-17Al-11Mn合金丝维氏硬度、显微组织和循环拉伸性能的影响。研究发现，随时效时间延长，β相组织减少，同时形成与奥氏体共格的6层单斜结构贝氏体和网状结构，贝氏体体积分数由0增加到90%。强化相的析出使合金丝的维氏硬度显著升高，由223升高到381。在循环加载卸载过程中，随时效时间的延长，合金丝强度升高，超弹性逐渐降低。在不断累加2.0%应变的循环拉伸下，300 ℃时效30 min的样品经过4次循环达到8.0%应变后仍能完全回复，残余应变为0，超弹性应变达到7.3%，表现出良好的超弹性，相变临界应力提升到353 MPa。 |
| 英文摘要: |
| 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. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
