摘要
以6061铝合金粉为原料,以Ti H2粉为发泡剂,研究了低应变速率下小孔径泡沫铝的压缩性能。结果表明：粉末冶金法制备的泡沫铝孔径小,孔结构均匀。随着压缩压力的增加,泡沫铝经历弹性变形、坍塌变形和致密化3个阶段。泡沫铝静态压缩应力-应变曲线呈弧线形,随着应变量的增加,不同孔隙率的泡沫铝的应力呈相同的变化趋势。泡沫铝的吸能能力与应变量成正比,与孔隙率成反比;而吸能效率和孔隙率成正比,随应变量增大先升高后降低。
The compressive properties of aluminum foam with small pore size at low strain rate were studied by using 6061 aluminum alloy powder as raw material and Ti H2 powder as foaming agent. The results show that the pore size of aluminum foam prepared by powder metallurgy method is small and the pore structure is uniform. With the increase of compression pressure,aluminum foam undergoes three stages：elastic deformation,collapse deformation and densification. The static compressive stress-strain curve of aluminum foam is arc-shaped. With the increase of strain,the stress of aluminum foam with different porosity shows the same trend. The energy absorption capacity of aluminum foam is directly proportional to the strain and inversely proportional to the porosity. However,the energy absorption efficiency is proportional to the porosity,and increases at first and then decreases with the increase of the strain.
作者
王军德
陈贵清
WANG Jun-de;CHEN Gui-qing(Changji Vocational and Technical College,Changji 831100,China;Fujian Chuanzheng Communications College,Fuzhou 350007,China)
出处
《粉末冶金工业》
CAS
北大核心
2018年第4期26-30,共5页
Powder Metallurgy Industry
基金
新疆维吾尔自治区高校科研计划科学研究重点项目(XJEDU2016I068)
福建省教育厅A类科技项目(JA15659)
福建省自然科学基金项目(2017J71020)
关键词
泡沫铝
压缩性能
应力
应变
aluminum foam
compressive property
stress
strain
