温度和应变率历史对拉伸载荷下铁基记忆合金本构关系影响的研究  

Research for temperature and strain-rate history effects on constitutive relation of Fe-base shape memory alloy under tension

作　　者：佟景伟[1] 高丛峰[1] 李鸿琦[1] C.Albertini V.Pizzinato 

机构地区：[1]天津大学力学系,天津300072 [2]CommissionoftheEuropeanCommunities

出　　处：《兵器材料科学与工程》2002年第1期17-20,共4页Ordnance Material Science and Engineering

基　　金：国家自然科学基金项目 (193 72 0 11)

摘　　要：在 2 0～ 5 0 0℃和 0 .0 0 2 0 8～ 193s-1的范围内研究了温度和应变率历史对拉伸载荷下铁基记忆合金本构关系的影响。实验结果表明 ,应变率历史对该材料具有强化作用 ,而且随着预应变率的提高 ,其强度提高 ,延伸率降低。The effects of temperature and strain-rate history on the constitutive relations of Fe-base shape memory alloy under tension have been studied at temperature range from 20℃ to 500℃ and strain-rate range from 0.002?08s -1 to 193s -1 . The experimental results show that the strain-rate history strengthens this material, and the strength increases and the elongation decreases with the rising prestrain rate.The sensitivity of the material to the strain-rate history decreases with the rising temperature.

关 键 词：应变率历史 铁基记忆合金 本构关系 高温实验 拉伸载荷 

分 类 号：TG139.6[一般工业技术—材料科学与工程]