摘要
利用真空感应熔炼-反向热挤压法制备了Mg-16Gd-xZn(x=0,0.5,1.0,2.0,wt.%)4组合金,用X射线衍射,激光扫描共聚焦显微镜、扫描电镜、透射电镜、能谱分析仪及EBSD技术研究了Zn元素添加对挤压态Mg-16Gd-xZn合金微观组织的影响。研究结果表明:Zn元素添加可以有效地细化合金晶粒,平均晶粒尺寸由4.8±2.3μm细化至3.3±1.4μm。二元Mg-16Gd合金由α-Mg与Mg5Gd两相构成;当添加Zn至x=0.5、x=1.0时,两组合金均由α-Mg、Mg5Gd、(Mg,Zn)3Gd三相组成;而Zn添加至x=2.0时,合金由α-Mg与(Mg,Zn)3Gd两相构成。挤压态Mg-16Gd-2.0Zn合金内存在大量的片层状γ’强化相,沿着{0001}基面生长,与基体完全共格。
Mg-16Gd-xZn(x=0,0.5,1.0,2.0,wt.%)alloys were fabricated by vacuum induction melting-indirect hot extrusion,microstructure and texture were investigated by X-ray diffraction,laser scanning confocal microscope,scanning electron microscope,transmission electron microscope,energy dispersive spectrometer and electron back scattering diffraction.Results show that grains of these extruded alloys are considerably refined when the zinc addition,and the grain size decreases from 4.8μm to 3.3μm.Mg-16 Gd binary alloy consist ofα-Mg solid solution and Mg5Gd phase;when adding zinc to x=0.5,x=1.0,the alloys all consist ofα-Mg,Mg5Gd and(Mg,Zn)3Gd phase;and added Zn to x=2.0,the Mg-16 Gd-2.0 Zn alloy consist ofα-Mg and(Mg,Zn)3Gd.There are a large number of lamellarγ’phase within theα-Mg matrix in the extruded Mg-16Gd-2.0Zn alloy,it formed as(0001)αplates and completely coherent with theα-Mg matrix.
作者
谢红波
潘虎成
任玉平
李洪晓
蒋敏
秦高梧
XIE Hongbo;PAN Hucheng;REN Yuping;LI Hongxiao;JIANG Min;QIN Gaowu(Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)
出处
《中国体视学与图像分析》
2019年第2期110-117,共8页
Chinese Journal of Stereology and Image Analysis
基金
国家重点研发项目(No.2016YFB0701202)
国家自然科学基金资助项目(No.51525101,No.51501032,No.U1610253)
