研究了Ca对AZ91D镁合金显微组织、力学性能和腐蚀性能的影响.当AZ91D中加人的Ca含量大于1.0%时,β相(Mg17Al12)减少,并且在晶界上形成了网状分布的Al2Ca相.拉伸测试表明,当加入Ca含量小于1%时,可以提高合金的常温抗拉强度和延伸率,继续增大Ca含量时合金的力学性能明显下降.当AZ91D中加入的Ca含量达到1.0%时,常温抗拉强度和延伸率较AZ91D分别提高了8.2%和29.3%,并且腐蚀速率下降为AZ91D的17.2%.其原因主要是由于形成了网状分布的Al2Ca相,使镁合金的自腐蚀电位升高,腐蚀电流密度降低,从而阻碍了镁合金的腐蚀.
参考文献
| [1] | 吴国华,谢敏,翟春泉,曾小勤,朱燕萍,丁文江.Purification technology of AZ91 magnesium alloy wastes[J].中国有色金属学会会刊(英文版),2003(06):1260-1264. |
| [2] | 王业双,王渠东,马春江,丁文江,朱燕萍.Zn和RE对Mg-9Al合金热裂倾向性的影响[J].中国有色金属学报,2003(01):40-45. |
| [3] | Mathieu S;Rapin C;Steinmetz J et al.A corrosion study of the main constituent phases of AZ91 magnesium alloys[J].Corrosion Science,2003,45:2741-2755. |
| [4] | Ambat R;Aung N;Zhou W .Evaluation of microstructural effects on corrosion behaviour of AZ91D magnesium alloy[J].Corrosion Science,2000,42:1433-1455. |
| [5] | 刘生发,范晓明,王仲范.钙在铸造镁合金中的作用[J].铸造,2003(04):246-248. |
| [6] | NINOMIYA R;Ojtro T;Kubpta K .Improved heat resistance of Mg-Al alloys by the Ca addition[J].Acta Metallurgica Et Materialia,1995,43(02):669-683. |
| [7] | Mihriban O. Pekguleryuz;Eric Baril .Creep Resistant Magnesium Diecasting Alloys Based on Alkaline Earth Elements[J].Materials transactions,2001(7):1258-1267. |
| [8] | 曾小勤,王渠东,吕宜振,丁文江,朱燕萍,翟春泉,卢晨.Mg-9Al-0.5Zn-0.1Be-XCa合金的组织和力学性能研究[J].机械工程材料,2001(05):15-18. |
| [9] | Mathieu S;Rapin C;Hazan J et al.Corrosion behavior of high pressure die-cast and semi-solid cast AZ91D alloys[J].Corrosion Science,2002,44:2737-2756. |
| [10] | Mathieu S;Rapin C;Steinmetz J .A corrosion study of the main constituent phases of AZ91 magnesium alloys[J].Corrosion Science,2003,45:2741-2755. |
| [11] | G. Song;A.L. Bowles;D.H. StJohn .Corrosion resistance of aged die cast magnesium alloy AZ91D[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1):74-86. |
| [12] | 闵学刚,孙扬善,杜温文,薛烽.Ca,Si和RE对AZ91合金的组织和性能的影响[J].东南大学学报(自然科学版),2002(03):409-414. |
| [13] | Murray J L .The Al-Mg system[J].Bulletin of Alloy Phase Diagrams,1982,3(01):60-64. |
| [14] | Itkin V P;Alcock C B;Van P J et al.The Al-Ca system[J].Bulletin of Alloy Phase Diagrams,1988,9(06):652-657. |
| [15] | Nayeb Hashemi A A;Clark J B .The Mg-Ca system[J].Bulletin of Alloy Phase Diagrams,1987,8(01):58-65. |
| [16] | Song G;Atrens A;Dargusch M .Influence of microstructure on the corrosion of diecast AZ91D[J].Corrosion Science,1999,41:249-273. |
| [17] | Young-Jin Ko;Chang Dong Yim;Jong Dae Lim .Effect of Mg_(17)Al_(12) Precipitate on Corrosion Behavior of AZ91D Magnesium Alloy[J].Materials Science Forum,2003(Pt.2):851-856. |
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%