The effects of yttrium and strontium on the microstructure and mechanical properties of Mg-11Li-3Al magnesium alloy (LA113) are compared and analyzed. Microstructures and phases of the alloys were studied with optical microscope (OM), scanning electron microscope (SEM), X-ray diffractometer (XRD) and energy dispersive spectrometer (EDS). Mechanical properties of alloys were measured with tensile tester. The results show that yttrium and/or strontium additions produce a strong grain refi ning effect in LA113 alloy. Al2Y and Al4Sr,etc. phases with different morphologies are verifi ed and exist inside the grain or at the grain boundaries, which directly impact on the mechanical properties of LA113 alloy. The results of tensile tests show that, the as-extruded LA113-1Y-1Sr alloy obtains the optimal tensile property of which the tensile strength and elongation are 253.56 MPa and 18.12%, the tensile strength is increased by almost 25% compared with the as-extruded LA113 alloy.
参考文献
| [1] | Wu, L.;Cui, C.;Wu, R.;Li, J.;Zhan, H.;Zhang, M. .Effects of Ce-rich RE additions and heat treatment on the microstructure and tensile properties of Mg-Li-Al-Zn-based alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(4/5):2174-2179. |
| [2] | LI Ming,HAO Hai,ZHANG Aimin,SONG Yingde,ZHANG Xingguo.Effects of Nd on microstructure and mechanical properties of as-cast Mg-8Li-3Al alloy[J].稀土学报（英文版）,2012(05):492-496. |
| [3] | Hiroaki Matsumoto;Sadao Watanabe;Shuji Hanada .Fabrication of pure Al/Mg-Li alloy clad plate and Its mechanical properties[J].Journal of Materials Processing Technology,2005(1):9-15. |
| [4] | Shou-Ren Wang;Pei-Quan Guo;Li-Ying Yang;Yanjun Wang .Microstructure and Mechanical Properties of AZ91 Alloys by Addition of Yttrium[J].Journal of Materials Engineering and Performance,2009(2):137-144. |
| [5] | Wang Tao,Zhang Milin,Niu Zhongyi,Liu Bin.Influence of Rare Earth Elements on Microstructure and Mechanical Properties of Mg-Li Alloys[J].稀土学报（英文版）,2006(06):797-800. |
| [6] | Wu An-ru;Xia Chang-qing .Study of the microstructure and mechanical properties of Mg-rare earth alloys[J].Materials & Design,2007(6):1963-1967. |
| [7] | Yang MB;Pan FS;Cheng RJ;Tang AT .Comparation about efficiency of Al-10Sr and Mg-10Sr master alloys to grain refinement of AZ31 magnesium alloy[J].Journal of Materials Science,2007(24):10074-10079. |
| [8] | T. Liu;S.D. Wu;S.X. Li;P.J. Li .Microstructure evolution of Mg–14% Li–1% Al alloy during the process of equal channel angular pressing[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(0):499-503. |
| [9] | M.-X. Zhang;P. M. Kelly;M. A. Easton .Crystallographic study of grain refinement in aluminum alloys using the edge-to-edge matching model[J].Acta materialia,2005(5):1427-1438. |
| [10] | Zhang MX;Kelly PM;Qian M;Taylor JA .Crystallography of grain refinement in Mg-Al based alloys[J].Acta materialia,2005(11):3261-3270. |
| [11] | 李瑞红,潘复生,蒋斌,殷恒梅,刘婷婷.Y和Sr的添加对Mg-14Li-1Al合金铸态组tn,的影响[J].中国有色金属学报（英文版）,2011(04):778-783. |
| [12] | B. Jiang;D. Qiu;M.-X. Zhang .A new approach to grain refinement of an Mg-Li-Al cast alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(1/2):95-98. |
| [13] | Wang, T.;Wu, R.;Zhang, M.;Li, L.;Zhang, J.;Li, J. .Effects of calcium on the microstructures and tensile properties of Mg-5Li-3Al alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(18):5678-5684. |
| [14] | Xiangrui Meng;Ruizhi Wu;Milin Zhang .Microstructures and properties of superlight Mg-Li-Al-Zn wrought alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):722-725. |
| [15] | YAN YANG;XIAODONG PENG;WEIDONG XIE .Influence of Extrusion on the Microstructure and Mechanical Behavior of Mg-9Li-3Al-xSr Alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2013(2):1101-1113. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%