| 热挤压高强度Mg-6Zn-4Y合金 |
| |
| 引用本文： | 杨文朋,郭学锋.热挤压高强度Mg-6Zn-4Y合金[J].中国有色金属学会会刊,2011,21(11):2358-2364. |
| |
| 作者姓名： | 杨文朋 郭学锋 |
| |
| 作者单位： | 西安理工大学材料科学与工程学院;河南理工大学材料科学与工程学院 |
| |
| 基金项目： | Project (50271054) supported by the National Natural Science Foundation of China;Project (20070700003) supported by the Doctorate Programs Foundation of Ministry of Education of China;Project (102102210031) supported by the Science and Technologies Foundation of Henan Province, China;Project (2010A430008) supported by the Natural Science Foundation of Henan Educational Committee of China |
| |
| 摘 要： | 通过铸造和300℃热加压制备细晶Mg-6Zn-4Y合金,利用XRD、OM、SEM和TEM研究合金组织,并测试其室温拉伸性能。结果表明,合金主要由α-Mg和W相两相组成,挤压态合金具有双峰晶粒尺寸分布;细小晶粒为动态再结晶晶粒,平均尺寸为1.2μm;粗大晶粒（占面积分数的23%）为未再结晶区域,并沿挤压方向被拉长。合金的极限抗拉强度、屈服强度和伸长率分别为（371±10）MPa,（350±5）MPa和（7±2）%,其工程应力—应变曲线有明显的屈服点。合金高强度归因于晶粒细化和W相、纳米沉淀颗粒及强基面织构的增强作用。
|
| 关 键 词： | Mg-6Zn-4Y合金 挤压 W相 高强度 屈服现象 |
| 收稿时间： | 20 December 2010 |
High strength magnesium alloy with α-Mg and W-phase processed by hot extrusion |
| |
| Wen-peng YANG,Xue-feng GUO.High strength magnesium alloy with α-Mg and W-phase processed by hot extrusion[J].Transactions of Nonferrous Metals Society of China,2011,21(11):2358-2364. |
| |
| Authors: | Wen-peng YANG Xue-feng GUO |
| |
| Affiliation: | aSchool of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China;bSchool of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China |
| |
| Abstract: | Fine-grained Mg-6Zn-4Y alloy was prepared by an ingot metallurgy process with hot extrusion at 300 °C. The microstructure was studied by XRD, OM, SEM and TEM, and the tensile properties were tested at room temperature. The results show that the alloy is composed of α-Mg and W-phase. The microstructure of the as-extruded alloy has a bimodal grain size distribution. The fine grains with the mean size of 1.2 μm are formed by dynamic recrystallization. The coarse grains (about 23% in area fraction) are unrecrystallized regions which are elongated along extrusion direction. The engineering stress—strain curve shows a pronounced yield point. The ultimate tensile strength, yield strength, and elongation are (371±10) MPa, (350±5) MPa and (7±2)%, respectively. The high strengths are attributed to the fine-grained matrix structure enhanced by W-phase particles, nano-scaled precipitates, and strong basal plane texture. |
| |
| Keywords: | Mg-6Zn-4Y alloy extrusion W-phase high strength yield phenomenon |
| 本文献已被 CNKI 维普 ScienceDirect 等数据库收录！ |
|
