泡沫Al-0.16Sc合金等温时效后的压缩及能量吸收性能  

Compression and Energy Absorption Properties of Cellular Al-0.16 Sc Alloy Foam after Isothermal Aging

作　　者：黄粒[1] 杨东辉[2,3] 王辉[1] 吕昭平[1] 叶丰[1] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083 [2]河海大学力学与材料学院,南京210098 [3]常州市河海科技研究院有限公司,常州213164

出　　处：《机械工程材料》2013年第8期36-40,49,共6页Materials For Mechanical Engineering

基　　金：中央高校基本科研项目(FRF-TP-09-026B);常州市科技支撑计划项目(CE20120024);高等学校博士学科点基金课题(20100006110013);北京科技大学新金属材料国家重点实验室研究基金资助项目(2011Z-13)

摘　　要：采用熔体发泡法（以钙为增黏剂，TiHz为发泡剂）成功制备出孔隙率为（78±0．5）％、孔结构均匀的泡沫A1-0．16Sc合金，对其进行300℃等温时效处理，采用室温准静态压缩试验，研究了时效前后该合金的压缩和能量吸收性能。结果表明：300℃等温时效能明显提高泡沫铝合金的屈服强度，且其能在时效720h内基本保持不变；经较佳时效工艺处理（5～720h）后泡沫铝合金的屈服强度明显高于T6态A1—0．24Sc合金的和泡沫铝的，且接近于高强泡沫AlCu5Mn合金的；同时，300℃等温时效亦能明显提升该泡沫合金的能量吸收性能，时效10h后其能量吸收能力与高强泡沫AICu5Mn合金的相当，且能量吸收效率稳定。Using Ca as thickening agent and Till2 as blowing agent, cellular A1 0. 16Sc alloy foams with a porosity of （78±0. 5）% and a homogeneous pore structure, were successfully fabricated by melt-foaming method. In quasi-static compression test at room temperature, the compression and energy absorption properties of the foams before and after isothermal aging at 300 ℃ were investigated. The results show that the isothermal aging at 300 can significantly improve the yield strength which remained unchanged up to 720 h. The yield strength of A1-0. 16Sc alloy foam treated in the good aging process within 5 -- 720 h was obviously higher than T6 treated cellular A1 0. 24Sc alloy and A1 foams, and was comparable with high strength A1Cu5Mn alloy foam. Moreover, the isothermal aging at 300 ℃ was also beneficial to the enhancement of the energy absorption properties for the AI 0. 16Sc alloy foam. The energy absorption capacity of the A1 0. 16Sc alloy foam aged for 10 h was comparable with that of A1CuSMn alloy foams and the energy absorption efficiency was stable.

关 键 词：泡沫铝钪合金 压缩性能 能量吸收 等温时效处理 

分 类 号：TG146.21[一般工业技术—材料科学与工程]