摘要
通过显微组织观察和室温拉伸实验,研究了固溶处理制度和时效前预变形对含Sc的Al-Cu-Li-Zr合金力学性能与显微组织的影响。结果表明:适当提高固溶温度或延长固溶时间可以促进合金中过剩相的溶解,提高合金的强度和塑性;时效前适量的预变形促进T1相的大量弥散、细小析出,显著提高合金强度。过大的预变形量使T1相变得粗大且分布不均匀,合金强度降低。合金适宜的固溶制度为530℃,保温60 min,适宜的预变形量为3.5%。
Effect of solution treatment and deformation-aging on the microstructures and mechanical properties of Ak-Cu-Li-Sc-Zr alloy was investigated by observation of microstructures and tensile test at room temperature. The results show that increasing solution temperature or solution time properly will improves the strength, plasticity of the alloy. The pre-deformation makes T1 precipitation distribute more dispersively and homegenously and greatly improve tensile properties of the alloy. But too much stretch induce T1 particle to coarsen and result in decrease of mechanical properties of alloy. A better solution treatment is 530℃ 1 h. The favorable predefonnation is about 3.5 % under the experiment condition.
出处
《轻合金加工技术》
CAS
北大核心
2005年第12期41-44,52,共5页
Light Alloy Fabrication Technology
基金
国家"863"计划项目(2002AA305104)
关键词
含钪Al-Cu-Li-Zr合金
固溶
预变形
力学性能
显微组织
Al- Cu- Li-Zr alloy containing Sc
solution treatment
pre-deformation
mechanical properties
microstructure
