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�������պ����ѧѧ�� 2005, Vol. 31 Issue (02) :121-124    DOI:
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����1, �Ժ���1, ������1, ��ݱ�1, ������2, ��ΰ2*
1. �������պ����ѧ ���Ͽ�ѧ�빤��ѧԺ, ���� 100083;
2. �������ղ����о�Ժ, ���� 100095
Stability on the damping capacity and microstructure of the high strength damping aluminum alloy
Ma Yue1, Zhao Haitao1, Han Haijun1, Xu Huibin1, Li Peiyong2, Li Wei2*
1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Beijing Institute of Aeronautical Materials, Beijing 100095,China

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ժҪ ����ʱЧ����ʵ��,�о��˿�������/��ĩұ�����Ʊ���X7093/5(Zn-30Al)��ǿ���������Ͻ���������ܺ���֯�ȶ���.���������Ͻ�ֱ���50��,100��,120�汣��10?h,50?h,100?h�����,���ö�̬��ѧ�ȷ�����(DMTA)��͸��羵(TEM)�ֱ�������������ܺ͹۲�΢����֯�ı仯���.�о��������: �������Ͻ���ʱЧ������,��֯�ṹ�����ϸ�����ҵľ�̬�ṹת��Ϊ���й��򾧽�Ĵ����ṹ,����ԺϽ��������ܵĹ�����ǿ.��������250����¶ȷ�Χ��,�Ͻ�����ֵ��4×10-3����3.0×10-2.�������Ͻ���120�����¡�100?h���ڵ�ʱЧ������,ʱЧ�¶Ⱥ�ʱЧʱ��IJ�ͬ�ԺϽ��������ܵ�Ӱ�첻����,���ϵ����������ȶ�������.
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Abstract�� The stability on the damping capacity and microstructure of the X7093/5(Zn-30Al) high strength aluminum alloy prepared by rapid solidification and powder metallurgy process was investigated with aging treatment. The alloy was aged at 50��,100��,120�� for 10?h,50?h,100?h separately and then air cooled. The damping capacity and microstructure variation was tested with dynamic mechanical thermal analysis(DMTA) and transmission electron microscope(TEM). The result shows that the microstructure of the alloy changed from fine crystals to large crystals with regular and sharp grain boundaries, the effect of grain boundaries on the damping capacity increased. From room temperature to 250��, the damping capacity increased from 4×10-3 to 3.0×10-2. Aging time and temperature do not have significant effect on the damping capacity below 120�� and 100?h and the alloy kept excellent stability.
Keywords�� high strength damping aluminum alloys   damping capacity   grain boundary internal friction   rapid set   powder metallurgy     
Received 2004-06-20;
About author: �� ��(1961-),Ů,�ӱ��Ϲ���,������,mayue@buaa.edu.cn.
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����, �Ժ���, ������, ��ݱ�, ������, ��ΰ.��ǿ�������Ͻ���������ܺ���֯�ȶ���[J]  �������պ����ѧѧ��, 2005,V31(02): 121-124
Ma Yue, Zhao Haitao, Han Haijun, Xu Huibin, Li Peiyong, Li Wei.Stability on the damping capacity and microstructure of the high strength damping aluminum alloy[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2005,V31(02): 121-124
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