The effect of calcium addition on the microstructures of AZ91 magnesium alloy was investigated. It was found that a small amount of calcium in AZ91 alloy produced a large decrease in the a-Mg grain size and the dispersed fine β-Mg17 Al12 phases. In addition, some Al4 Ca particles were found to exist in the AZ91 alloy containing 0.5 wt% Ca. EDS analysis and water-quenched technique revealed that the grain-refining mechanism of calcium for the AZ91 alloys was mainly attributed to the role of restricting growth of calcium in the primary a-Mg crystals.
参考文献
| [1] | Polmear I J.Magnesium Alloys and Applications[J].MATERIALS SCIENCE AND TECHNOLOGY,1994(01):1-16. |
| [2] | Mordike B L;Ebert T .Magnesium-properties-application-potential[J].Materials Science and Engineering,2001,A302:37-45. |
| [3] | Edward J.Vinarcik .Light Metal Advances in the Automotive Industry[J].Light Metal Age,2001(3/4):74-77. |
| [4] | Dwain M Magers.A Global Review of Magnesium Parts in Automobiles[J].Light Metals Age,1996(05):60-62. |
| [5] | Bamberger M. .Structural refinement of cast magnesium alloys [Review][J].Materials Science and Technology: MST: A publication of the Institute of Metals,2001(1):15-24. |
| [6] | Tamura Y .Grain Refining Mechanism and Casting Structure of Mg-Zr Alloy[J].Japan Institute of Light Metals,1998,48(08):185-189. |
| [7] | Tamura Y;Kono N;Motigi T et al.Grain Refinement of Cast Mg-Al Alloys[J].Japan Institute of Light Metals,1998,48(04):395-399. |
| [8] | Sakamoto M;Akiyama S.Suppression of Ignition and Burning of Molten Mg Alloys by Ca Bearing Stable Oxide Film[J].Journal of Materials Science and Letters,1997(16):1048-1052. |
| [9] | Bong-Sun You;Won-Wook Park;In-Sang Chung .The Effect of Calcium Addition to Magnesium on the Microstructure and Compositional Changes of Oxide Film Formed at High Temperature[J].Materials transactions,2001(6):1139-1141. |
| [10] | Mihriban O. Pekguleryuz;Eric Baril .Creep Resistant Magnesium Diecasting Alloys Based on Alkaline Earth Elements[J].Materials transactions,2001(7):1258-1267. |
| [11] | R. NINOMIYA;T. OJIRO;K. KUBOTA .IMPROVED HEAT RESISTANCE OF Mg-Al ALLOYS BY THE Ca ADDITON[J].Acta Metallurgica et Materialia,1995(2):669-674. |
| [12] | Pettersen K;Lohne O;Ryum N .Dendritic Solidificaion of Magnesium Alloy AZ91[J].METALLURGICAL TRANSACTIONS,1999,21A:221-230. |
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%