利用光学显微镜、X射线衍射仪、扫描电子显微镜、万能力学试验机等手段,系统研究了稀土Nd的含量对Mg-6Zn-Mn镁合金的显微结构和力学性能的影响.结果表明,稀土Nd对铸态Mg-6Zn-Mn镁合金具有明显的细化枝晶作用.经过360℃挤压后,合金显微组织发生明显变化.当Nd含量较低时(低于0.4％,质量分数),合金的动态再结晶率较低,合金的室温综合力学性能最好,与初始合金相比,其屈服强度提高了17％,达到250MPa,抗拉强度超过300MPa.然而,随着Nd含量的进一步增加,合金的动态再结晶率升高,发生完全动态再结晶,在其晶界上析出粗大的T相,而导致合金综合力学性能下降.
参考文献
| [1] | 张丁非,丁培道,潘复生,彭建.重庆镁合金研究与产业的发展现状与建议[J].材料导报,2004(08):89-92. |
| [2] | 丁文江,彭立明,付彭怀,何上明,陈彬,郭兴伍,曾小勤.高性能镁合金及其成形加工技术与应用研究进展[J].新材料产业,2008(02):58-63. |
| [3] | 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. |
| [4] | 余琨,黎文献,李松瑞.变形镁合金材料的研究进展[J].轻合金加工技术,2001(07):6-8,11. |
| [5] | 彭建,吕滨江,潘复生,张丁非.高塑性Mg-Zn系稀土镁合金的研究进展[J].热加工工艺,2010(18):15-19. |
| [6] | 戴庆伟,张丁非,袁炜,石国梁,段红玲.新型Mg-Zn-Mn变形镁合金的挤压特性与组织性能研究[J].材料工程,2008(04):38-42. |
| [7] | LE Q C;ZHANG Z Q;SHAO Z W et al.Microstructures and mechanical properties of Mg-2％ Zn-0.4％ RE alloys[J].Transactions of Nonferrous Metals Society of China,2010,20(02):352-356. |
| [8] | Zou HH;Zeng XQ;Zhai CQ;Ding WJ .Effects of Nd on the microstructure of ZA52 alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):229-234. |
| [9] | Fu, PH;Peng, LM;Jiang, HY;Chang, JW;Zhai, CQ .Effects of heat treatments on the microstructures and mechanical properties of Mg-3Nd-0.2Zn-0.4Zr (wt.%) alloy[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2008(1/2):183-192. |
| [10] | Ding WJ;Li DQ;Wang QD;Li Q .Microstructure and mechanical properties of hot-rolled Mg-Zn-Nd-Zr alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(0):228-230. |
| [11] | 张丁非,石国梁,赵霞兵,齐福刚.Mg-x%Zn-1%Mn（x=4, 5, 6, 7, 8, 9）变形镁合金的组织演变和力学性能[J].中国有色金属学报（英文版）,2011(01):15-25. |
| [12] | Yang, J;Wang, JL;Wang, LD;Wu, YM;Wang, LM;Zhang, HJ .Microstructure and mechanical properties of Mg-4.5Zn-xNd (x=0, 1 and 2, wt%) alloys[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2008(1/2):339-344. |
| [13] | Qiang Li;Qudong Wang;Yingxin Wang .Effect of Nd and Y addition on microstructure and mechanical properties of as-cast Mg-Zn-Zr alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):115-123. |
| [14] | X. Gao;J.F. Nie .Structure and thermal stability of primary intermetallic particles in an Mg-Zn casting alloy[J].Scripta materialia,2007(7):655-658. |
| [15] | F. Wagner;N. Bozzolo;O. Van Landuyt .Evolution of recrystallisation texture and microstructure in low alloyed titanium sheets[J].Acta materialia,2002(5):1245-1259. |
| [16] | Bozzolo N;Dewobroto N;Grosdidier T;Wagner E .Texture evolution during grain growth in recrystallized commercially pure titanium[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):346-355. |
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%