塑性中孔隙率通孔多孔铝的压缩性能研究  

Compressive properties of open- cell porous aluminum with middle porosity

作　　者：王展光[1,2] 龚昕[1] 蔡萍[1,2] 李书琴[1] 

机构地区：[1]井冈山大学,江西吉安343009 [2]凯里学院,贵州凯里556011

出　　处：《轻金属》2014年第3期54-58,共5页Light Metals

基　　金：江西省科技支撑项目(2010BGA01700);凯里学院博士启动项目

摘　　要：在采用熔模铸造工艺制备孔径d=2．5～3．5mm和d=3．8—4．3mm，孔隙率P=56．8％-86．6％的通孔多孔铝基础上，通过单轴压缩试验，研究通孔多孔铝的压缩性能和吸能能力。通孔多孔铝单轴压缩应力应变曲线，呈现线弹性变形、塑性平台段、压缩紧实阶段3个阶段；通孔泡沫铝的压缩屈服强度、吸能能力随着孔隙率增大而减小，采用Gibson—Ashby的模型拟合通孔多孔铝的压缩屈服强度。Based on open - cell porous aluminum （ d = 2.5 - 3.5ram and d = 3.8 - 4.3mm, p = 56.8% - 86.6% ） prepared by investment casting, mechanical properties and energy absorption capacity were investigated by the uniaxial compression test. The results showed that compressive stress - strain curve of open - cell porous aluminum consisted of three distinct regions ： the linear elasticity region, the plastic collapse region and the densification region, and compressive strength and energy absorption capacity of open - cell porous aluminum decreased with the increase of porosity. Then the compressive yield stress was fitted by Gibson - Ashby model.

关 键 词：通孔多孔铝 孔径 压缩性能 吸能能力 

分 类 号：TB383.4[一般工业技术—材料科学与工程]