采用光学显微镜,扫描电子显微镜等手段研究了退火处理对热挤压Mg-3.8％ Zn-1％Y合金组织及性能的影响.结果表明,该合金经425℃×15 min退火可通过完全再结晶获得细小的晶粒,合金的拉伸屈服强度为171.9 MPa,伸长率为29.8％.EBSD分析表明合金的优良的塑性来自于合金在拉伸过程中拉伸压缩(｛1012-｝-｛1011-｝)二次孪生的交互发生引起的协调变形.另外,拉伸过程中形成的较弱的“双峰”型｛0002｝纤维织构作为变形有利的取向也有利于改善合金的塑性.
参考文献
| [1] | 丁文江,吴玉娟,彭立明,曾小勤,林栋樑,陈彬.高性能镁合金研究及应用的新进展[J].中国材料进展,2010(08):37-45. |
| [2] | 赵政 .高强度铸造重稀土镁合金的开发与研究[D].上海:上海交通大学,2009. |
| [3] | 吴玉锋,杜文博,左铁镛.Mg-Al-Nd/Sr耐热镁合金的组织结构与蠕变性能[J].中国有色金属学报,2010(09):1680-1685. |
| [4] | E. Mora;G. Garces;E. Onorbe .High-strength Mg-Zn-Y alloys produced by powder metallurgy[J].Scripta materialia,2009(9):776-779. |
| [5] | M. Nishida;Y. Kawamura;T. Yamamuro .Formation process of unique microstructure in rapidly solidified Mg_(97)Zn_1Y_2 alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):1217-1223. |
| [6] | Xu, S.W.;Zheng, M.Y.;Kamado, S.;Wu, K..The microstructural evolution and superplastic behavior at low temperatures of Mg-5.00Zn-0.92Y-0.16Zr (wt.%) alloys after hot extrusion and ECAP process[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:60-68. |
| [7] | Park E S;Yi S;Ok J B.Proceedings of the MRS Fall Meeting[M].Boston,MA,2001 |
| [8] | Hong Jun Chae;Bum-Sung Kim;Young Do Kim;Taek-Soo Kim.Microstructure and mechanical properties of a Mg-Zn_(4.3)Y_(0.7) alloy powder reinforced by quasi-crystalline particles[J].Materials Letters,2012:63-66. |
| [9] | Tong, L.B.;Li, X.H.;Zhang, H.J..Effect of long period stacking ordered phase on the microstructure, texture and mechanical properties of extruded Mg-Y-Zn alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2013:177-183. |
| [10] | Ju Yeon Lee;Do Hyung Kim;Hyun Kyu Lim .Effects of Zn/Y ratio on microstructure and mechanical properties of Mg-Zn-Y alloys[J].Materials Letters,2005(29/30):3801-3805. |
| [11] | Mayama, T.;Noda, M.;Chiba, R.;Kuroda, M. .Crystal plasticity analysis of texture development in magnesium alloy during extrusion[J].International Journal of Plasticity,2011(12):1916-1935. |
| [12] | Xu, S.W.;Zheng, M.Y.;Kamado, S.;Wu, K.;Wang, G.J.;Lv, X.Y. .Dynamic microstructural changes during hot extrusion and mechanical properties of a Mg-5.0 Zn-0.9 Y-0.16 Zr (wt.%) alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(12):4055-4067. |
| [13] | D.K. Xu;W.N. Tang;L. Liu .Effect of Y concentration on the microstructure and mechanical properties of as-cast Mg-Zn-Y-Zr alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):129-134. |
| [14] | D.H. Bae;S.H. Kim;D.H Kim .Deformation behavior of Mg-Zn-Y alloys reinforced by icosahedral quasicrystalline particles[J].Acta materialia,2002(9):2343-2356. |
| [15] | A. Singh;M. Watanabe;A. Kato .Microstructure and strength of quasicrystal containing extruded Mg-Zn-Y alloys for elevated temperature application[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):382-396. |
| [16] | D.K. Xu;W.N. Tang;L. Liu .Effect of Y concentration on the microstructure and mechanical properties of as-cast Mg-Zn-Y-Zr alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):129-134. |
| [17] | M.R. Barnett;C.H.J. Davies;X. Ma .An analytical constitutive law for twinning dominated flow in magnesium[J].Scripta materialia,2005(7):627-632. |
| [18] | M.R. Barnett .Twinning and the ductility of magnesium alloys Part Ⅰ: 'Tension' twins[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):1-7. |
| [19] | Mao, P.;Liu, Z.;Wang, C..Texture effect on high strain rates tension and compression deformation behavior of extruded AM30 alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:13-21. |
| [20] | 孟强,蔡庆伍,江海涛,胡水平.AZ31镁合金单轴拉伸过程中的{0002}双峰织构观察[J].稀有金属,2011(02):159-163. |
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