摘要
通过相图计算(Pandat)、光学显微镜(OM)、扫描电镜(SEM)和导电率测试等手段,研究了Gd含量对3003铝合金铸态及均匀化态微观组织的影响。结果表明,随着Gd含量由0上升到0.3wt%,均匀化组织中的平均晶粒尺寸407.88μm减小到201.06μm。添加Gd元素后铸态3003铝合金的第二相为长条状的Al_(6)FeMn和亮白色颗粒状的Al_(3)Gd;经560℃×24 h均匀化处理后,第二相主要为颗粒状与针状Al_(6)Mn以及短棒状的GdMn_(2)Al_(10)。当Gd含量为0.2wt%时,合金中可获得细小晶粒以及均匀分布的第二相,导电率最高,为29.97%IACS。
Effect of Gd content on microstructure of as-cast and homogenized 3003 aluminum alloy was studied by means of phase diagram software(Pandat),optical microscope(OM),scanning electron microscope(SEM) and conductivity measurement.The results show that with the increase of Gd content from 0 to 0.3wt%,the average grain size in the homogenized structure decreases from 407.88 μm to 201.06 μm.The second phase of the as-cast 3003 aluminum alloy after adding Gd element is Al_(6FeMn) in long strip shape and Al_(3Gd) in bright white granular shape.After homogenization at 560 ℃ for 24 h,the second phase is mainly granular and acicular Al_(6Mn) and short rod GdMn_2Al_(10).When the Gd content is 0.2wt%,fine grains and a uniformly distributed second phase can be obtained in the alloy,with the highest conductivity of 29.97%IACS.
作者
黄元春
马尚坤
刘宇
严积珺
吴镇力
Huang Yuanchun;Ma Shangkun;Liu Yu;Yan Jijun;Wu Zhenli(Institute of Light Alloy Research,Central South University,Changsha Hunan 410083,China;School of Mechanical and Electrical Engineering,Central South University,Changsha Hunan 410083,China;State Key Laboratory of High Performance Complex Manufacturing,Changsha Hunan 410083,China;Collaborative Innovation Center for Advanced Nonferrous Structural Materials and Manufacturing,Changsha Hunan 410083,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第9期129-135,共7页
Heat Treatment of Metals
基金
湖南省自然科学基金青年科学基金(2022JJ40608)。
