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�������պ����ѧѧ�� 2003, Vol. 29 Issue (3) :241-243    DOI:
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��������ʱγ-TiAl���������֯�������ܵı仯
�����1, ����1, �ֽ���2, ���2*
1. �������պ����ѧ ���Ͽ�ѧ�빤��ϵ;
2. ��̶��ѧ ����ϵ
Structure and Hardness Changes of Laser Melted TiAl Alloy��Surface During Continuous Heating
Wu Guoqing1, Huang Zheng1, Lin Jianguo2, Yang Jinhai2*
1. Dept. of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics;
2. Department of Physics, Xiangtan University

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Abstract�� Structural transformation and hardness variation in the laser melted TiAl intermetallic alloy surface during continuous heating were studied systemically. The results indicated that, during continuous heating from 50 to 1000�� with a heating rate of 10��/min, α2→γ phase transformation in the laser melted TiAl intermetallic alloy surface takes place at about 750��, and the dendritic structure is transformed into fine-grained structure at about 860��, correspondingly, variations in the hardness of the laser melted TiAl intermetallic alloy surface were also measured. The fine grain structure was considered to be a good basis of superplastic/diffusion bonding.
Keywords�� micro structure   hardness   heat treatment   laser surface treatment   Titanium aluminide     
Received 2001-10-10;
Fund:

������Ȼ��ѧ����������Ŀ(59971004); ���ջ�����ѧ����������Ŀ(01H51004)

About author: �����(1974-),��,ɽ��������,��ʿ��,100083,����.
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�����, ����, �ֽ���, ���.��������ʱγ-TiAl���������֯�������ܵı仯[J]  �������պ����ѧѧ��, 2003,V29(3): 241-243
Wu Guoqing, Huang Zheng, Lin Jianguo, Yang Jinhai.Structure and Hardness Changes of Laser Melted TiAl Alloy��Surface During Continuous Heating[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(3): 241-243
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2003/V29/I3/241
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