利用透射电子显微镜(TEM)研究了Mg-6％(质量分数,下同)Zn-1％ Mn(ZM61)镁合金中Mn在不同状态下的存在形式和作用.结果表明,铸态组织中大多数Mn固溶于基体中；均匀化处理以后,组织中析出少量细小的α-Mn颗粒；挤压和固溶时大部分Mn以形状规则的α-Mn颗粒的形式析出,主要有3种形态,即规则多边形(以六边形为主)、球状和棒状.通过高分辨透射电子显微分析发现,α-Mn颗粒与α-Mg基体之间存在共格界面关系((1010)α-Mg//(301)α-Mn,[1216]α-Mg//[123]α-Mn).研究还发现α-Mn颗粒可以作为时效过程中MgZn2相的异质形核核心,但依附α-Mn颗粒形核的MgZn2相都较粗大.根据二维晶格错配度“Bramifit模型”计算得出,当α-Mn颗粒与MgZn2之间存在位向关系((200)α-Mn//(1010)MgZn2,[012]α-Mg//[1213]MgZn2)时,二者之间的晶格错配度仅为2.14％,且高分辨显微分析也发现α-Mn颗粒(200)面与MgZn2的(1010)呈共格关系.
参考文献
| [1] | Wan Diqing;Wang Jincheng;Wang Gaifang;Chen Xianyi;Linlin;Feng Zhigang;Yang Gencang .Effect of Mn on damping capacities, mechanical properties, and corrosion behaviour of high damping Mg–3wt.%Ni based alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):139-142. |
| [2] | Von Buch F;Mordike BL;Pisch A;Schmid-Fetzer R;Lietzau J .Development of Mg-Sc-Mn alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(1):1-7. |
| [3] | Tong, L.B.;Zheng, M.Y.;Xu, S.W.;Kamado, S.;Du, Y.Z.;Hu, X.S.;Wu, K.;Gan, W.M.;Brokmeier, H.G.;Wang, G.J.;Lv, X.Y. .Effect of Mn addition on microstructure, texture and mechanical properties of Mg-Zn-Ca alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(10/11):3741-3747. |
| [4] | Gaowu W. Qin;Yuping Ren;Wei Huang;Song Li;Wenli Pei .Grain refining mechanism of Al-containing Mg alloys with the addition of Mn–Al alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(2):410-413. |
| [5] | Taisuke Sasaki;Y. Takigawa;K. Higashi .Effect of Mn on fracture toughness in Mg–6Al–1 wt.%Zn alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):117-124. |
| [6] | Fang X Y;YiDQ;NieJ F et al.Effect of Zr,Mn and Sc additions on the grain size of Mg-Gd alloy[J].Journal of Alloys and Compounds,2009,470(1-2):311. |
| [7] | ZHANG Zhen-yan,PENG Li-ming,ZENG Xiao-qin,DING Wen-jiang.Effects of Cu and Mn on mechanical properties and damping capacity of Mg-Cu-Mn alloy[J].中国有色金属学会会刊(英文版),2008(z1):55-58. |
| [8] | Li Jianping;Lorimer G W;Robson J et al.The microstructures of As-cast Mg-Zr and Mg-Mn alloys[J].Materials Science Forum,2005,488-489:329. |
| [9] | Li Jianping;Lorimer G W;Robson J et al.Investigation on microstructures of heat treated Mg-Zr and Mg-Mn alloys[J].Materials Science Forum,2005,488-489:189. |
| [10] | Sabrina Alam Khan;Yukio Miyashita;Yoshiharu Mutoh;Zainuddin Bin Sajuri .Influence of Mn content on mechanical properties and fatigue behavior of extruded Mg alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):315-321. |
| [11] | 戴庆伟,张丁非,袁炜,石国梁,段红玲.新型Mg-Zn-Mn变形镁合金的挤压特性与组织性能研究[J].材料工程,2008(04):38-42. |
| [12] | Buha J .Reduced temperature (22-100 degrees C) ageing of an Mg-Zn alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):11-19. |
| [13] | Sung S. Park;Yoon S. Oh;Dae H. Kang;Nack J. Kim .Microstructural evolution in twin-roll strip cast Mg-Zn-Mn-Al alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):352-355. |
| [14] | Zhang M X;Kelly P M .Edge-to-edge matching and its applications:Part Ⅱ.Application to Mg-Al,Mg-Y and MgMn alloys[J].Acta Materialia,2005,53(04):1085. |
| [15] | Li Chong;Liu Xiangfa;Zhang Guohua .Heterogeneous nucleating role of TiB2 or AIP/TiB2 coupled compounds on primary Mg2Si in Al-Mg-Si alloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2008,497(1-2):432. |
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