摘要
采用高能球磨、氮气烧结以及热挤压的工艺制备高性能弥散强化2024铝合金(Al-Mg-Cu系),对烧结和挤压弥散强化2024铝合金的组织和性能进行了研究。结果表明,氮气烧结过程中产生的液相有助于材料的致密化,烧结后的铝合金致密度较高,相对密度达到97.1%。所制备的弥散强化2024铝合金通过热挤压和T6热处理后具有优异的力学性能,其抗拉强度达到612 MPa,屈服强度465 MPa,性能要远远优于普通的2024变形铝合金。
High performance Al-Cu-Mg alloy was fabricated by high energy ball milling, nitrogen sintering and hot extrusion. The microstructure and mechanical properties of the material were investigated. Results show that the formation of liquid phase during sintering promotes the aluminum alloy densification. Relative density of 97.1% can be achieved after sintering. The 2024 aluminum alloy shows excellent mechanical properties after extru- sion and T6 heat treatment. The ultimate tensile strength and yield strength are 612 MPa and 465 MPa, respective- ly, which is superior to those of conventional 2024 aluminum alloy.
出处
《粉末冶金工业》
CAS
北大核心
2015年第6期30-35,共6页
Powder Metallurgy Industry
基金
国家863计划资助项目(2013AA031104)
关键词
铝合金
球磨
烧结
热挤压
力学性能
aluminum alloy
ball milling
sintering
hot extrusion
mechanical property
