利用光学显微镜、扫描电镜及力学性能测试等分析手段研究了不同热处理条件对Mg-5Gd-0.5Sc-Mn合金的微观组织和力学性能的影响.结果表明,Mg-5Gd-0.5Sc-Mn合金具有良好的室温性能及高温稳定性.比较T5和T6两种热处理工艺发现:挤压态合金在200 ℃经过不同时间的时效,T5态较T6态的峰值时效硬度高,且T5态到达峰值时效的时间比T6态的短;合金T5态的室温抗拉强度可以达到216MPa,200 ℃达到191 MPa,均高于T6态的191和186MPa;T5态室温及高温条件下的断裂模式表现为准解理及微孔聚集的塑性断裂,而T6态室温及高温条件下分别为解理和准解理的脆性断裂.
参考文献
| [1] | Smola B.;Stulikova I.;von Buch F.;Mordike BL. .Structural aspects of high performance Mg alloys design[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1-2 Special Issue SI):113-117. |
| [2] | Hiroyuki Sato;Kouichi Maruyama;Hiroshi Oikawa .Effects of the third element on creep behavior of Al-Mg and αFe-Be solid solution alloys[J].Materials Science and Engineering A,1997,234-236:1067-1070. |
| [3] | Ya Zhang;Xiaoqin Zeng;Liufa Liu;Chen Lu;Hantao Zhou;Qiang Li;Yanping Zhu .Effects of yttrium on microstructure and mechanical properties of hot-extruded Mg-Zn-Y-Zr alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):320-327. |
| [4] | 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. |
| [5] | KOUICHI MARUYAMA;MAYUMI SUZUKI;HIROYUKI SATO .Creep Strength of Magnesium-Based Alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2002(3a):875-882. |
| [6] | Ifeanyi Anthony Anyanwu;Shigeharu Kamado;Yo Kojima .Aging characteristic and high temperature tensile properties of Mg-Gd-Y-Zr alloys[J].Materials Transactions,2002,42(07):1206-1211. |
| [7] | Sukhanov V D;Dobromyslov A V;Rokhlin L L et al.Decompositon of supersaturated solid solutions Mg-Ho and Mg-Gd[J].The Physics Metals and Metallogmphy,2002,94(03):282-289:72-79. |
| [8] | Gangyin Yuan;Kenji Amiya;Akihisa lnoue .Excellent creep properties of Mg-Zn-Cu-Gd-based alloy strengthened by quasicrystals and Laves phases[J].Mater J Res,2005,20(05):1278-1286. |
| [9] | Kentaro Yamada;Yoshiyuki Okubo;Masashi Shiono .Alloy Development of High Toughness Mg-Gd-Y-Zn-Zr Alloys[J].Materials transactions,2006(4):1066-1070. |
| [10] | Mola B S;Mordike B L;Pelcova J et al.Microstructure and phase changes due to heat treatment of aqueeze cast Mg-Sc-(CE)-Mn alloys[J].Phys Stat Scl(a),2002,191:301-316. |
| [11] | A.rudajevova;F.von Buch .Thermal diffusivity and thermal conductivity of MgSc alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(1/2):27-30. |
| [12] | P. J. Apps;H. Karimzadeh;J. F. King;G. W. Lorimer .Phase compositions in magnesium-rare earth alloys containing yttrium, gadolinium or dysprosium[J].Scripta materialia,2003(5):475-481. |
| [13] | 冯端.金属物理学(第三卷 金属力学性质)[M].北京:科学出版社,1998 |
| [14] | Cahn R W.非铁合金的结构和性能[M].北京:科学出版社,1999 |
| [15] | 陈振华.镁合金[M].北京:化学工业出版社,2004 |
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