采用光学显微镜、扫描电镜、电子背散射衍射仪、透射电镜及拉伸试验机等手段,研究了新型铝锌镁铜锆钪合金经挤压变形及双级时效处理后型材的组织和性能.结果表明:该合金型材双级时效后的抗拉强度为540 MPa,屈服强度为507 MPa,伸长率为11.1％,电导率为41.7％IACS;添加微量元素钪后,合金型材在伸长率和电导率相当的情况下,抗拉强度和屈服强度分别提高了4.5％和4.7％;钪主要以Al3 (Sc,Zr)相形式存在,Al3 (Sc,Zr)相可以显著细化合金的晶粒和阻碍合金的回复再结晶行为,并且有效抑制晶界无析出带的出现和晶界沉淀相的粗化;另外,在合金中发现了由铝、铜和钪三种元素形成的W相.
参考文献
| [1] | 冯朝辉,王少华,胡兴华,龚澎,杨守杰,陆政,汝继刚,张兴国,戴圣龙.第二级时效工艺对7050铝合金厚板组织及性能的影响[J].机械工程材料,2011(05):35-38,42. |
| [2] | 王胜强,王少华,马志峰,王强,王建国,陆政.一种新型Al-Zn-Mg-Cu-Zr合金的变形行为研究[J].材料工程,2012(06):11-15,70. |
| [3] | O.N. Senkov;M.R. Shagiev;S.V. Senkova .Precipitation of Al_3(Sc,Zr) particles in an Al-Zn-Mg-Cu-Sc-Zr alloy during conventional solution heat treatment and its effect on tensile properties[J].Acta materialia,2008(15):3723-3738. |
| [4] | O. N. Senkov;R. B. Bhat;S. V. Senkova .Microstructure and Properties of Cast Ingots of Al-Zn-Mg-Cu Alloys Modified with Sc and Zr[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2005(8):2115-2126. |
| [5] | 戴晓元,夏长清,刘昌斌.钪对Al-Zn-Mg-Cu-Zr合金组织性能的影响[J].稀有金属材料与工程,2006(06):913-916. |
| [6] | M.M. Sharma;M.F. Amateau;T.J. Eden .Hardening mechanisms of spray formed Al-Zn-Mg-Cu alloys with scandium and other elemental additions[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(1/2):135-142. |
| [7] | 戴晓元,罗要菊,寇莉莉,石志豪.Al-9.0Zn-2.5Mg-2.5Cu-0.15Zr-0.2Sc合金中Al3（Sc,Zr）粒子的析出行为[J].材料热处理学报,2012(z1):61-66. |
| [8] | 蒙毅,赵志浩,崔建忠.微量Zr和Sc对Al-Mg-Si-Cu-Cr-V合金显微组织和力学性能的影响[J].中国有色金属学报（英文版）,2013(07):1882-1889. |
| [9] | YUNTAO LI;ZHIYI LIU;QINGKUN XIA .Grain Refinement of the Al-Cu-Mg-Ag Alloy with Er and Sc Additions[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2007(11):2853-2858. |
| [10] | L. L. Rokhlin;T. V. Dobatkina;N. R. Bochvar .Investigation of phase equilibria in alloys of the Al-Zn-Mg-Cu-Zr-Sc system[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):10-16. |
| [11] | 戴晓元,夏长清,刘昌斌.微量钪对Al-Zn-Mg-Cu-Zr铝合金组织与性能的影响[J].矿冶工程,2004(03):59-61,63. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%