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| PHASE DIAGRAM AND PROPERTIES OF TERNARY Al-Mg-Ce ALLOYS |
| CUI Zhongqi; WU Rengeng (Harbin Institute of Technology) (Manuscript received 3 November; 1983) |
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Cite this article:
CUI Zhongqi; WU Rengeng (Harbin Institute of Technology) (Manuscript received 3 November; 1983). PHASE DIAGRAM AND PROPERTIES OF TERNARY Al-Mg-Ce ALLOYS. Acta Metall Sin, 1984, 20(6): 429-437.
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Abstract The 300 and 400℃ isothermal sections of the Al-rich corner of Al-Mg-Ce ternary phase diagram with composition of 0—36 wt-% Mg and 0—50 wt-% Ce have been studied by X-ray structural analysis, metallography, microhardness test and electrical resistance measurement. The regions of 4 single-phase, 8 double-phase and 4 triple-phase were detected in the given alloy composition. Two new ternary compounds T_1-and T_2-phase were found in the solid solution regions of 21—22 wt-% Mg-14.5—16 wt-% Ce and 27.5—28.5 wt-% Mg-40.5—41.5 wt-% Ce respectively. The mechanical properties at room temperature and the stress corrosion of Al-Mg alloy containing Ce have been also examined. Experimental data showed that the great improvement over SCC of the Al-Mg alloys is related to the change of their microstructure. The β-phase without Ce distributes as continuous chain structure along the grain boundary. While an addition of Ce to β-phase would destroy the continuity, eliminate the chain structure, purify the grain boundaryand form Ce-containing solution strip precipitates along the grain boundary.
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Received: 18 June 1984
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1 大西忠一;中谷義三,轻金属,29(1979) ,21．
2 #12
3 Trehan, Y. N.; Gupte, P. K., Indian Constr. News, 10 (1961) , №10, 90．
4 #12
5 崔忠圻,哈尔滨工业大学研究生论文,1964． |
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