用OM、SEM、EDS、XRD和拉伸试验机等分析了添加稀土钕对AM60镁合金显微组织、断口形貌、析出相及力学性能的影响.结果表明:加入稀土钕能有效细化AM60镁合金的显微组织,使Mg17Al12相变少、变细;适量的稀土钕元素优先与合金中的铝元素反应生成颗粒状(小针状)的Al11Nd3相,能有效提高合金的抗拉强度、屈服强度和伸长率;过量的稀土钕则会消耗合金中更多的铝元素并导致针状Al11Nd3相粗化,使合金的力学性能下降;试验条件下,添加质量分数为0.9%钕的合金力学性能最佳,其抗拉强度为230 MPa,屈服强度为127 MPa,伸长率为14%,分别比AM60合金提高了28%,48%和1.8倍.
参考文献
| [1] | H. Friedrich;S. Schumann .Research for a "new age of magnesium" in the automotive industry[J].Journal of Materials Processing Technology,2001(3):276-281. |
| [2] | 曾荣昌,柯伟,徐永波,韩恩厚,朱自勇.Mg合金的最新发展及应用前景[J].金属学报,2001(07):673-685. |
| [3] | 田政,宋波,刘勇兵.AM系镁合金在汽车工业中的应用与发展[J].汽车工艺与材料,2004(07):21-23. |
| [4] | Y. Peng;D. Li;Y. Wang .Numerical Study on the Low Pressure Die Casting of AZ91D Wheel Hub[J].Materials Science Forum,2005(0):393-396. |
| [5] | Y.C. LEE;A.K. DAHLE .The Role of Solute in Grain Refinement of Magnesium[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2000(11):2895-2906. |
| [6] | Yosuke Tamura;Tadashi Haitani;Eiji Yano .Grain Refinement of High-Purity Mg-Al Alloy Ingots and Influences of Minor Amounts of Iron and Manganese on Cast Grain Size[J].Materials transactions,2002(11):2784-2788. |
| [7] | F. ROSALBINO;E. ANGELINI;S. DE NEGRI .Effect of erbium addition on the corrosion behaviour of Mg-Al alloys[J].Intermetallics,2005(1):55-60. |
| [8] | Wang Mingxing,Zhou Hong,Wang Lin.Effect of Yttrium and Cerium Addition on Microstructure and Mechanical Properties of AM50 Magnesium Alloy[J].稀土学报（英文版）,2007(02):233-237. |
| [9] | 刘英,陈维平,张卫文,张大童,李元元.Effects of RE on Microstructures and Mechanical Properties of Hot-Extruded AZ31 Magnesium Alloy[J].稀土学报(英文版),2004(04):527-532. |
| [10] | Wang YX;Guan SK;Zeng XQ;Dine WJ .Effects of RE on the microstructure and mechanical properties of Mg-8Zn-4Al magnesium alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1-2):109-118. |
| [11] | 周海涛,曾小勤,刘文法,丁文江,朱燕萍.稀土铈对AZ61变形镁合金组织和力学性能的影响[J].中国有色金属学报,2004(01):99-104. |
| [12] | WANG Ying-xin,GUAN Shao-kang,ZENG Xiao-qin,DING Wen-jiang.Effects of RE on the Microstructure of Mg-8Zn-4Al Magnesium Alloys[J].上海交通大学学报（英文版）,2005(03):298-302. |
| [13] | 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. |
| [14] | Zhao P;Wang QD;Zhai CQ;Zhu YP .Effects of strontium and titanium on the microstructure, tensile properties and creep behavior of AM50 alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):318-326. |
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