| 挤压对AZ91铸造镁合金力学性能的影响 |
| |
| 引用本文： | 李淑波,吴昆,郑明毅,熊守美.挤压对AZ91铸造镁合金力学性能的影响[J].材料工程,2006(12):54-57. |
| |
| 作者姓名： | 李淑波 吴昆 郑明毅 熊守美 |
| |
| 作者单位： | 1. 清华大学,机械工程系先进成形制造重点实验室,北京,100084
2. 哈尔滨工业大学,材料科学与工程学院,哈尔滨,150001 |
| |
| 摘 要： | 对挤压变形前后的AZ91镁合金进行了微观组织和力学性能研究.结果表明:挤压成形后合金的抗拉强度和塑性均得到提高;孪晶的产生,导致挤压合金室温压缩的应力-应变曲线上有屈服平台出现;晶粒尺寸强烈影响合金的强度.室温时,挤压合金的流变强度较铸态的高,而高温压缩的强度则较铸态的低.
|
| 关 键 词： | AZ91合金 挤压变形 孪晶 力学性能 挤压成形 铸造镁合金 力学性能 影响 Magnesium Alloy Cast Mechanical Properties Extrusion 高温压缩 铸态 流变强度 室温 晶粒尺寸 屈服平台 应变曲线 应力 孪晶 塑性 抗拉强度 结果 |
| 文章编号： | 1001-4381(2006)12-0054-04 |
| 收稿时间： | 2006-07-17 |
| 修稿时间： | 2006-09-12 |
Effect of Extrusion on Mechanical Properties of AZ91 Cast Magnesium Alloy |
| |
| LI Shu-bo,WU Kun,ZHENG Ming-yi,XIONG Shou-mei.Effect of Extrusion on Mechanical Properties of AZ91 Cast Magnesium Alloy[J].Journal of Materials Engineering,2006(12):54-57. |
| |
| Authors: | LI Shu-bo WU Kun ZHENG Ming-yi XIONG Shou-mei |
| |
| Affiliation: | 1 Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; 2 School. of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
| |
| Abstract: | The microstructure and mechanical properties of AZ91 magnesium alloy before and after extrusion were investigated. The results showed that tensile strength and ductility of extruded AZ91 alloy were greatly enhanced compared with the sample of as-cast AZ91 duo to grain refinement. Obvious yield phenomenon can he observed at true stress-strain curve of compression of extruded alloy as the result of twinning. The flow stress was strongly influence by the grain size. Flow stress of asextruded AZ91 alloy were higher than that of the as-cast alloy at room temperature, but the flow stress as extruded alloy was obviously decreased with the increase of deformation temperature. |
| |
| Keywords: | AZ91 alloy extrusion deformation twin mechanical property |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
