采用OM,SEM,EDS,XRD和硬度测试技术研究了EW83镁合金挤压板材的组织与性能不均匀性.结果表明,EW83合金挤压板材在成形过程中组织非均匀演变受再结晶与析出第二相的共同影响.在板材的边部,由于实际Z参数增大、析出相阻碍再结晶晶粒长大和粒子激发形核(PSN)再结晶等三类细化晶粒效应的耦合作用,实际晶粒尺寸小于平均Z-参数预测值约1倍;在板材的中部,由于温度升高引起的实际Z参数减小和静态再结晶晶粒长大效应的作用,实际晶粒尺寸大于平均Z-参数预测值约1倍.挤压态板材边部硬度值较中部高约5%;但时效处理后,其硬度值反而高出边部约10%.
参考文献
| [1] | M. Eddahbi;J.A. del Valle;M.T. Perez-Prado .Comparison of the microstructure and thermal stability of an AZ31 alloy processed by ECAP and large strain hot rolling[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(0):308-311. |
| [2] | Tang, WN;Chen, RS;Zhou, J;Han, EH .Effects of ECAE temperature and billet orientation on the microstructure, texture evolution and mechanical properties of a Mg-Zn-Y-Zr alloy[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2009(1/2):404-410. |
| [3] | S.X. Ding;W.T. Lee;C.P. Chang .Improvement of strength of magnesium alloy processed by equal channel angular extrusion[J].Scripta materialia,2008(9):1006-1009. |
| [4] | Shih-Wei Lee;Yu-Liang Chen;Hsiao-Yun Wang;Chih-Fu Yang;Jien-Wei Yeh .On mechanical properties and superplasticity of Mg-15Al-1Zn alloys processed by reciprocating extrusion[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):76-84. |
| [5] | J.A. del Valle;M.T. Perez-Prado;O.A. Ruano .Accumulative roll bonding of a Mg-based AZ61 alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(0):353-357. |
| [6] | M.T. Perez-Prado;J.A. del Valle;O.A. Ruano .Grain refinement of Mg-Al-Zn alloys via accumulative roll bonding[J].Scripta materialia,2004(11):1093-1097. |
| [7] | C. Xu;M. Furukawa;Z. Horita .Severe plastic deformation as a processing tool for developing superplastic metals[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):27-34. |
| [8] | 肖阳,张新明,陈健美,蒋浩,邓桢桢.高强耐热Mg-9Gd-4Y-0.6Zr合金的性能[J].中南大学学报（自然科学版）,2006(05):850-855. |
| [9] | 张新明,肖阳,陈健美,蒋浩.挤压温度对Mg-9Gd-4Y-0.6Zr合金组织与力学性能的影响[J].中国有色金属学报,2006(03):518-523. |
| [10] | EMLEY E F.Principles of magnesium technology[M].New York:pergaman Press,1966:483-490. |
| [11] | Z.-K. Peng;X.-M. Zhang;J.-M. Chen .Grain refining mechanism in Mg-9Gd-4Y alloys by zirconium[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2005(6):722-726. |
| [12] | 张新明,周楠,李理,唐昌平,邓运来.Mg-8Gd-3Y-0.6Zr合金热压缩过程的动态再结晶[J].中国有色金属学报,2009(12):2067-2073. |
| [13] | 马志新,张家振,李德富,张奎.Mg-Gd-Y-Zr镁合金热压缩流变应力的研究[J].热加工工艺,2007(22):26-29,33. |
| [14] | 张新明,陈健美,邓运来,肖阳,蒋浩.Mg-Gd-Y-Zr耐热镁合金的压缩变形行为[J].中国有色金属学报,2005(12):1925-1932. |
| [15] | 谢建新;刘建安.金属挤压理论与技术[M].北京:冶金工业出版社,2001:109-110. |
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%