采用XRD、OM和SEM等手段研究了稀土钐(0～2.0wt%)对AZ61合金显微组织和力学性能的影响.结果表明,稀土Sm可以显著提高时效态合金从室温至175℃区间的抗拉强度和屈服强度.在AZ61合金中加入0.5wt%～2.0wt%的Sm后,合金的显微组织得到细化,Sm优先与Al形成高熔点Al_2Sm弥散相.在研究范围内,加入1.5wt%Sm的合金从组织到各项力学性能最优.
Microstructure and mechanical properties of AZ61 magnesium alloy with Sm (0 ～ 2. 0wt%) addition were investigated by meansof OM ,SEM and XRD. The results show that the addition of Sm can dramatically enhance yield strength and tensile strength of the aged alloy at 20 ℃ ～ 175 ℃. Added 0. 5wt% ～ 2.0wt% Sin, the microstructure of the aged AZ61 alloy is remarkably refined, and the dispersed high-melting point phase Al_2Sm is found in the alloy. The microstructure and mechanical properties of the AZ61 alloy with 1.5wt% Sm are optimal.
参考文献
| [1] | Dobrza'nski L A;Tanski T;Cizck L .Structure and properties of magnesium cast alloys[J].Journal of Materials Processing Technology,2007,192 -193:567-5574. |
| [2] | 陈振华.镁合金[M].北京:化学工业出版社,2004 |
| [3] | 杨明波,潘复生,李忠盛,张静.Mg-Al系耐热镁合金中的合金元素及其作用[J].材料导报,2005(04):46-49. |
| [4] | LI Ji-qiang;DONG Xuan-pu;FAN Zi-tian et al.Effects of Ce and Sb on the microstrueture and properties of AZ91D magnesium alloy prepared by the EPC process[J].Bare Metals,2008,22(01):41-445. |
| [5] | Zhang Guoying,Zhang Hui,Gao Ming,Wei Dan.Mechanism of Effects of Rare Earths on Microstructure and Properties at Elevated Temperatures of AZ91 Magnesium Alloy[J].稀土学报（英文版）,2007(03):348-351. |
| [6] | 黄明志.金属力学性能[M].西安:西安交通大学出版社,1986 |
| [7] | Bramfitt B L .The effect of carbide and nitride additions on the heterogeneous nucleation behavior of liquid iron[J].Metallurgical and Materials Transactions,1970,7(01):1987-11995. |
| [8] | Drnschits A P;Showalter E R;Joseph et al.Evolution of structural and high-temperature magnesium alloys[J].SAE Technological Paper,2002,32(01):10-18. |
| [9] | Armstrong R;Cold I;Doutwaite R M et al.The relation of yield and flow stresses with grain size in polyerystalline iron[J].Philosophical Magazine,1962,77(07):45-451. |
| [10] | Hiromasa Y;Toshiro K .Thermal stability and hydrogen absorption/desurption properties of Mg_(17)Al_(12) produced by bulk mechanical alloying[J].Journal of Alloys and Compounds,2007,433(1 -2):241-2245. |
| [11] | 胡赓祥;蔡珣.材料科学基础[M].上海:上海交通大学出版社,2000 |
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