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《Journal of Aeronautical Materials》 2009-04
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Effect of Rare Earth La and Ce on Microstructure and Properties of TiAl Alloy Prepared by Mechanical Alloying

HONG Yu1,WU Yu-cheng1,LI Yun1,WANG Feng-tao1,WANG Qing-ping1,2,LI Dong-hui1(1.School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;2.School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui China)  
Ti-44.7Al-xLa-yCe(at%) alloys were prepared by mechanical alloying with subsequent traditional powder metallurgy technique.The effect of the different La and Ce contents on microstructures was investigated by using scanning electron microscopy and metallographic microscope.The mechanical property of alloys was measured.The results show that the minim adding of rare earth as La and Ce into TiAl based alloy system have obvious effect on thinning the alloy by machine alloying.The bending strength of Ti-Al alloy is reinforced by the La addition,the bending strength reaches the peak as 0.5at% La addition,and later decreases with the increase in La content.But the bending strength of the alloy decreases rapidly with the increase in Ce content.Meanwhile the bending strength of the alloy with rare earth La is much higher than the addition of Ce.
【Fund】: 安徽省自然科学基金资助项目(070414180);; 合肥工业大学创新群体基金资助项目(103-037016)
【CateGory Index】: V252
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