Stability on the damping capacity and microstructure of the high strength damping aluminum alloy
-
摘要: 采用时效处理实验,研究了快速凝固/粉末冶金工艺制备的X7093/5(Zn-30Al)高强度阻尼铝合金的阻尼性能和组织稳定性.将阻尼铝合金分别在50℃,100℃,120℃保温10 h,50 h,100 h后空冷,采用动态力学热分析仪(DMTA)和透射电镜(TEM)分别测试其阻尼性能和观察微观组织的变化情况.研究结果表明: 阻尼铝合金在时效过程中,组织结构由最初细碎杂乱的晶态结构转变为具有规则晶界的大晶粒结构,晶界对合金阻尼性能的贡献增强.在室温至250℃的温度范围内,合金阻尼值由4×10-3增至3.0×10-2.阻尼铝合金在120℃以下、100 h以内的时效处理中,时效温度和时效时间的不同对合金阻尼性能的影响不显著,材料的阻尼性能稳定性良好.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.
-
[1] 李沛勇,戴圣龙.高阻尼铝基复合材料的研究动向[J].航空材料学报, 2000,20(3):164~171 Li Peiyong, Dai Shenglong. Trends in high damping aluminum matrix composites .Journal of Aeronautical Materials, 2000, 20(3):164~171(in Chinese) [2] 张小农,吴人杰.高阻尼金属基复合材料的发展途径[J].材料开发和应用, 1997,12(3):4548~4552 Zhang Xiaonong, Wu Renjie. Path of development on the high damping metal matrix composite materials [J]. Material Development & Application, 1997,12(3):4548~4552(in Chinese) [3] Sastry S, Krishna M, Uchil J. A study on damping behavior of acuminate particulate reinforced ZA-27 alloy metal matrix composites [J]. Journal of Alloys and Compounds, 2001,(314):268~274 [4] 李沛勇,戴圣龙,刘大博,等.低密度高阻尼金属/金属复合材料[J].材料科学与工艺, 1999,7(增刊):91~95 Li Peiyong, Dai Shenglong, Liu Dabo, et al. Low density high damping metal/metal composites [J]. Material Science & Technology, 1999,7(supplement):91~95(in Chinese) [5] 李沛勇.新型高阻尼金属材料的研究进展[J].材料工程, 2000,1:38~41 Li Peiyong. Recent developments in new high damping metallic materials [J]. Material Engineering, 2000,1:38~41(in Chinese) [6] 李沛勇,戴圣龙.低密阻尼金属/金属复合体材料的组织与性能研究[J].材料工程, 1999,5:12~15 Li Peiyong, Dai Shenglong. An investigation on microstructure and prosperities of low density damping metal/metal composite materials [J]. Material Engineering, 1999,5:12~15(in Chinese) [7] 葛庭燧.固体内耗理论基础[M].北京:科学出版社,2000.45~116 Ge Tingsui. Fundamental theories on internal friction of solid [M].Beijing:Science Press, 2000.45~116(in Chinese) -
点击查看大图
计量
- 文章访问数: 4516
- HTML全文浏览量: 218
- PDF下载量: 1164
- 被引次数: 0
下载:
