钇对Al- Cu-Mg-Mn合金组织与性能的影响
来源期刊：有色金属科学与工程2012年第2期
论文作者：张迎晖 钟志强 陈瀚
文章页码：32 - 36
关键词：稀土Y; Al-Cu-Mg-Mn合金；铸态组织；力学性能
Key words：rare earth yttrium; Al-Cu-Mg-Mn aluminum alloy; cast microstructure; tensile properties
摘 要：采用金相显微镜、X射线衍射仪及扫描电镜等研究手段，研究了质量分数为0%~0.4%的Y在Al-Cu-Mg-Mn合金中存在形式及对其组织性能的影响，研究结果表明：Y含量在低于0.3%范围时，随含量增加合金细化效果逐渐增加；当Y含量为0.3%时，铸态组织中晶粒细化与组织均匀化效果明显；当Y含量大于0.3%时，合金的铸态组织中晶粒随着其含量的增加又逐渐粗化；Y加入合金中主要形成Cu4Al8Y，合金组织性能得到改善。
Abstract:
This paper studies the existent form of yttrium in Al-Cu-Mg-Mn alloy and the effects of yttrium 0 %~0.4 %,mass fraction on microstructure and properties of Al-Cu-Mg-Mn alloy using optical microscope, scanning electron microscope and X-ray diffraction. The results showed that the cast microstructure of Al-Cu-Mg-Mn alloy was gradually fined when quantity of yttrium was under 0.3 % (mass fraction). The grain size dropped and homogenization was fined remarkably with addition of 0.3 %yttrium. The cast microstructures of the alloy gradually become coarse when the percentage of the yttrium increased to more than 0.3 %. The Cu4Al8Y resulting from addition of yttrium to the Al-Cu-Mg-Mn alloy was distributed at the grain boundary, which is beneficial to improve the property of aluminum alloy.
