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开孔泡沫Al-10%Mg合金的动态压缩行为的研究
引用本文:程和法,黄笑梅.开孔泡沫Al-10%Mg合金的动态压缩行为的研究[J].热加工工艺,2003(6):1-2.
作者姓名:程和法  黄笑梅
作者单位:1. 合肥工业大学,安徽,合肥,230009;中国科学院固体物理研究所,安徽,合肥,230031
2. 合肥工业大学,安徽,合肥,230009
基金项目:安徽省自然科学基金资助项目 (0 30 4 4 60 2 )
摘    要:用Hopkinson压杆实验装置对开孔结构的泡沫Al—10%Mg合金进行了动态压缩实验,在应变率为准静态、800s^-1和2000s^-1条件下测量了动态和准静态压缩应力—应变曲线,研究了这种铝合金泡沫的动态压缩行为,并分析了其应变率效应。结果表明:在动态和准静态压缩下,泡沫Al—10%Mg合金的压缩σ—ε曲线均表现出弹性变形段、平缓段和紧实段三阶段特征;泡沫Al—10%Mg合金具有明显的应变率敏感性,随应变速率的提高,相同应变量下的流动应力上升。

关 键 词:泡沫Al-10%Mg合金  动态压缩  应变率效应
文章编号:1001-3814(2003)06-0001-02
修稿时间:2003年2月25日

Investigation on Dynamic Compressive Behavior of Open-cell Al-10%Mg Alloy Foam
CHENG He-fa.Investigation on Dynamic Compressive Behavior of Open-cell Al-10%Mg Alloy Foam[J].Hot Working Technology,2003(6):1-2.
Authors:CHENG He-fa
Affiliation:CHENG He-fa~
Abstract:The dynamic compressive experiments on the open-cell Al-10%Mg alloy foam were conducted using split hopkinson pressure bar.The compressive stress-strain curves were measured at the strain rate of static 800 s~(-1) and 2000 s~(-1).The dynamic compressive behavior and the strain rate sensitivity of this aluminum alloy foam was investigated.The results show that the compressive stress-strain curves of the open-cell Al-10%Mg alloy foam under both dynamic and static compression are characterized by three regions,i.e elastic region, plateau region and densification region; furthermore,a distinct strain rate sensitivity is observed in the dynamic compression of this alloy foam,for a given strain,the yield strength and flow stress increase with increasing strain rate.
Keywords:Al-10%Mg alloy foam  dynamic compression property  strain rate sensitivity
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