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Acta Metall Sin  1994, Vol. 30 Issue (1): 20-24    DOI:
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ROOM TEMPERATURE MECHANICAL PROPERTIES OF ORDERED TiAl+La ALLOYS
CHEN Shiqi;QU Xuanhui;LEI Changming;HUANG Baiyun(Central South University of Technologv;Changsha)(Manuscript received 26 August;1993;in revised form 30 October;1993)
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CHEN Shiqi;QU Xuanhui;LEI Changming;HUANG Baiyun(Central South University of Technologv;Changsha)(Manuscript received 26 August;1993;in revised form 30 October;1993). ROOM TEMPERATURE MECHANICAL PROPERTIES OF ORDERED TiAl+La ALLOYS. Acta Metall Sin, 1994, 30(1): 20-24.

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Abstract  The strength and ductility of Ti-48Al may be improved by adding certain amount of La and approached to optimal values with increasing to 1.0 and 0.2 at.-% La respectively.It seems to be noticeable that the optimal ductility of TiAl alloy containing La is higher beyond twice than that free from La.Observations showed that the improvement may be caused by the La due to homogenize and refine the TiAl microstructure,to form La2O3 particles and to reduce O2 content in matrix. However,excess La addition would result in forming coarse oxide particles and some pores,thus its mechanical properties deteriorate.Correspondent:CHEN Shiqi,lecturer,(Powder Metallurgy Research Institute,Central South University of Technology,Changsha 410083)
Key words:  La      TiAl      mechanical property     
Received:  18 January 1994     
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1曲选辉,黄伯云,吕海波,黄培立.稀有金属科学与工程,1993,22(1):112KawabataT,TadanoM,IzumiO.ScriptaMetall,1988;22:17253VasudevanVK,CourtSA.KurathP,FraserHL.ScriptaMelall,1989:23:9074熊翔,黄伯云,雷长明,吕海波.稀有金属科学与工程,1992;21:375《稀土》编写组编,稀土(下).北京:冶金工业出版社,1978;353
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