为改善铸态Mg-12Li-3Gd-3Y-0.6Zr合金的力学特性，对铸锭进行均匀退火处理。采用金相显微镜、SEM、XRD、显微硬度测试和拉伸力学特性测试，观察和研究了试验合金的微观组织和力学特性。结果表明：最佳的均匀化退火工艺为500℃×8 h，均匀化退火后合金的抗拉强度由铸态的114 MPa提高到133 MPa。第二相形态及分布的改变是Mg-12Li-3Gd-3Y-0.6Zr合金力学特性改变的主要原因。
In order to improve the mechanical properties of as-cast Mg-12Li-3Gd-3Y-0.6Zr magnesium alloy,homogenizing annealing treatment was carried out. The microstructure and mechanical properties of the alloy were studied using optical microscopy,SEM,XRD,microhardness tester and tensile tester. The results show that the optimal homogenization process is 500℃× 8 h. The tensile strength of the annealed alloy increases to 133 MPa from 114 MPa of the as-cast. The fine morphology and precipitation of the second phase can explain the mechanical properties improvement of Mg-12Li-3Gd-3Y-0.6Zr alloy.
参考文献
| [1] | 王涛,张密林,牛中毅,巫瑞智.Mg-Li-Al-Zn-RE合金铸态和退火态的组织与性能[J].金属热处理,2008(02):5-8. |
| [2] | Mordike BL. .Creep-resistant magnesium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1-2 Special Issue SI):103-112. |
| [3] | Z. Yang;J.P. Li;Y.C. Guo .Precipitation process and effect on mechanical properties of Mg-9Gd-3Y-0.6Zn-0.5Zr alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(0):274-280. |
| [4] | 黄光胜,汪凌云,黄光杰,潘复生.均匀化退火对AZ31B镁合金组织与性能的影响[J].重庆大学学报（自然科学版）,2004(11):18-21. |
| [5] | 余琨,黎文献.Mg-Al-Zn系变形镁合金轧制及热处理后的组织和性能[J].金属热处理,2002(05):8-11. |
| [6] | 王涛,张密林,牛中毅.Y对Mg-8Li-3Al合金组织和性能的影响[J].轻合金加工技术,2007(10):35-37,50. |
| [7] | 杨君刚,ZHAO Mei-juan,蒋百灵.均匀化退火对AZ91D镁合金组织与性能的影响[J].材料热处理学报,2008(04):69-73. |
| [8] | 李慧中,郭菲菲,刘楚明,刘洪挺,王海军,梁霄鹏,赵家彦.Mg-10Gd-4.8Y-0.6Zr合金在520℃下的固溶处理行为[J].粉末冶金材料科学与工程,2011(03):323-328. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%