Al基非晶合金原位TEM拉伸塑性形变研究  

In-situ TEM observation of tensile plastic deformation of Al-based metallic glass

作　　者：尹嘉明 高鹏[1] 姚草根[1] 张绪虎[1] 程兴旺[2] 才鸿年[2] YIN Jiaming;GAO Peng;YAO Caogen;ZHANG Xuhu;CHENG Xingwang;CAI Hongnian(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076,China;Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]航天材料及工艺研究所,北京100076 [2]北京理工大学,北京100081

出　　处：《兵器材料科学与工程》2021年第5期1-5,共5页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(51271036)。

摘　　要：为探究Al基非晶合金小尺度变形行为,首次用热双金属片拉伸装置实现Al_(86)Ni_(7)Er_(5)Co_(1)La_(1)非晶合金纳米线原位TEM拉伸观察。结果表明:Al_(86)Ni_(7)Er_(5)Co_(1)La_(1)非晶合金纳米线室温下表现出明显尺寸效应,拉伸断裂应变高达14.6%;选区电子衍射分析表明,该成分非晶合金纳米线在变形过程中始终保持非晶状态,未发生形变诱发纳米晶现象。In order to investigate the plastic deformation behavior of Al-based metallic glass at the atomic scale,the in-situ tensile experiments of Al_(86)Ni_(7)Er_(5)Co_(1)La_(1) metallic glass nanowires in a transmission electron microscope were carried out for the first time by using a homemade bi-metallic tensile device. The results show that Al_(86)Ni_(7)Er_(5)Co_(1)La_(1) metallic glass nanowires exhibit significant size effect at room temperature,and the tensile fracture strain reaches 14.6%. The SAED results indicate that the Albased metallic glasses keep an amorphous state during the plastic deformation process, and deformation induced nanocrystallization does not occur.

关 键 词：Al基非晶 尺寸效应 原位TEM拉伸 

分 类 号：TG146.21[一般工业技术—材料科学与工程]