在Mg-9Al-1Zn合金的基础上添加不同质量分数的Yb, 制备了4种合金. 通过X射线衍射、金相显微镜、扫描电镜及能谱分析仪等手段分析了Yb的添加对AZ91D显微组织和力学性能的影响. 结果表明: Yb的加入, 显著改变了AZ91D合金的铸态组织, 细化了β-Mg17Al12相, 且β-Mg17Al12脆性相由连续网状分布逐渐变为离散状, 同时晶界上出现了块状的Al11Yb3和点状Al6Mn4Yb化合物. 当Yb含量为1.0%时, 该合金具有最佳的综合力学性能, 抗拉强度达到194 MPa, 比AZ91D提高22%, 伸长率和硬度也随着Yb含量的增加而提高. 研究表明, 重稀土元素Yb在镁合金中显示出与轻稀土更相近的作用效果.
参考文献
| [1] | Mordike B L;Ebert T .Magnesium properties-applications-potential[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2001,302:37. |
| [2] | Shepeleva L;Bamberger M .Microstructure of high pressure die cast AZ91D modified with Ca and Ce[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2006,425:312. |
| [3] | F. KHOMAMIZADEH;B. NAML;S. KHOSHKHOOEI .Effect of Rare-Earth Element Additions on High-Temperature Mechanical Properties of AZ91 Magnesium Alloy[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2005(12):3489-3494. |
| [4] | 刘生发,黄尚宇,徐萍.Ce对AZ91镁合金铸态组织细化的影响[J].金属学报,2006(04):443-448. |
| [5] | 王荣滨.稀土在镁合金中的作用与应用研究[J].有色金属加工,2007(01):27-29. |
| [6] | 马刚,郭胜利.稀土在镁合金中的应用[J].宁夏工程技术,2005(03):268-272. |
| [7] | 王明星,周宏,王林,李伟,赵宇,李文平.钇和铈对AM50镁合金显微组织和力学性能的影响[J].中国稀土学报,2007(01):69-73. |
| [8] | Wu Guohua;Fan Yu;Gao Hongtao;Zhai Chunquan Zhu Yanping .The effect of Ca and rare earth elements on the microstructure,mechanical properties and corrosion behavior of AZ91D[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2005,408:255. |
| [9] | Wang Jianli;Yang Jie;Wu Yaoming;Zhang Hongjie,Wang Limin .Microstructures and mechanical properties of as-cast Mg-5Al-0.4Mn-xNd(x=0,1,2 and 4) alloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2008,472:332. |
| [10] | 黎业生,董定乾,吴子平.稀土镁合金的研究现状及应用前景[J].轻合金加工技术,2006(04):1-6. |
| [11] | 黄正华,郭学锋,张忠明,徐春杰.铈对铸造镁合金AZ91D显微组织与力学性能的影响[J].稀有金属,2004(04):683-686. |
| [12] | Ma Qian;D. H. StJohn;M. T. Frost .Characteristic zirconium-rich coring structures in Mg-Zr alloys[J].Scripta materialia,2002(9):649-654. |
| [13] | Li Peijie;Tang Bin;Kandalova E G .Microstructure and properties of AZ91D alloy with Ca additions[J].Materials Letters,2005,59:671. |
| [14] | Lü Yizhen;Wang Qudong;Zeng Xiaoqin;Ding Wenjiang Zhai Chunquan Zhu Yanping .Effects of rare earths on the microstructure,properties and fracture behavior of Mg-Al alloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2000,278:66. |
| [15] | 宋雨来;刘耀辉;朱先勇;王素环 于思荣 .钕对AZ91镁合金组织及机械性能的影响[J].吉林大学自然科学学报,2006,36(03):289. |
| [16] | 贾振江,许春香,任红涛,吕正玲.稀土元素Nd对AM50镁合金金相组织和力学性能的影响[J].铸造设备研究,2007(06):18-19,23. |
| [17] | 杨友,刘勇兵,方懿.AZ91D+xNd压铸镁合金拉伸和疲劳断裂模式[J].铸造,2007(01):41-45. |
| [18] | Zhang Jinghuai;Wang Jun;Qiu Xin;Zhang Deping Tian Zheng Niu Xiaodong Tang Dingxiang Meng Jian .Effect of Nd on the microstructure,mechanical properties and corrosion behavior of die-cast Mg-4Al-based alloy[J].Journal of Alloys and Compounds,2008,464:556. |
| [19] | 黄晓锋,王渠东,曾小勤,袁广银,朱燕萍,丁文江.稀土对AM50力学性能及高温蠕变的影响[J].中国稀土学报,2004(04):493-496. |
| [20] | 裴利霞,张金山,高义斌,许春香,韩富银,王红霞,赵兴国,梁伟.稀土元素镧对AZ91镁合金显微组织及硬度的影响[J].铸造设备研究,2005(01):20-22. |
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%