TiB2颗粒增强6061铝合金的组织及力学性能
Microstructure and Mechanical Properties of TiB2 Particles Reinforced 6061 Aluminum Alloy
郝志飞 1刘志伟 1解佩佩 1余申卫 2何源 2董其娟 3魏作山 3李政霖 4尚金翅4
作者信息
- 1. 西安交通大学 材料科学与工程学院 金属材料强度全国重点实验室, 陕西 西安 710049
- 2. 中国船舶集团有限公司第十二研究所, 陕西 兴平 713102
- 3. 山东省先进铝基材料与技术重点实验室 滨州魏桥国科高等技术研究院, 山东滨州 256606
- 4. 山东金马汽车装备科技有限公司, 山东 临沂 276000
- 折叠
摘要
TiB2 颗粒对铝合金有良好的强化作用.通过超声辅助重熔稀释法制备TiB2/6061 复合材料,研究了TiB2 颗粒对铸态及挤压T6 热处理态6061 铝合金的微观组织及力学性能的影响.研究结果表明:添加2wt%TiB2 颗粒后,铸态平均晶粒尺寸从未添加TiB2 的355.7 μm细化至117.5 μm;TiB2 颗粒可以促进再结晶过程中的形核,并抑制晶粒长大;挤压热处理态TiB2/6061 复合材料的屈服强度为 330 MPa﹑抗拉强度为 385 MPa,相比未添加TiB2 的合金分别提高了11.8%和7.0%,其主要强化方式为热错配强化和Orowan强化.
Abstract
TiB2 particles have a good strengthening effect on aluminum alloys.TiB2/6061 composites were prepared by ultrasound-assisted remelting and dilution method,and the effects of TiB2 particles on the microstructure and mechanical properties of 6061 aluminum alloy in as-cast and extruded+T6 heat-treated states were investigated.The results show that after adding 2wt%TiB2 particles,the average grain size of the as-cast aluminum alloy is refined from 355.7 μm without adding TiB2 to 117.5 μm.TiB2 particles can promote nucleation and inhibit grain growth in recrystallization process.The yield strength of the extruded+T6 heat-treated TiB2/6061 composites is 330 MPa,and the ultimate tensile strength is 385 MPa,which increases by 11.8%and 7%compared with that of the alloy without TiB2 addition,respectively.The main types of reinforcement are thermal mismatch reinforcement and Orowan reinforcement.
关键词
TiB2颗粒增强铝基复合材料/6061铝合金/热挤压/热处理Key words
TiB2 particles reinforced aluminum matrix composite/6061 aluminum alloy/hot extrusion/heat treatment引用本文复制引用
基金项目
国家自然科学基金(51974224)
国家自然科学基金(51604211)
教育部产学研合作协同育人项目(220406429275922)
临沂市"揭榜制""组阁制"项目(2021JB003)
出版年
2024
NETL
NSTL
万方数据