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실시간 투과전자현미경을 이용한 Al 나노선의 인장시험 및 동적 변형거동
김성훈 ( Sung Hoon Kim ),김홍규 ( Hong Kyu Kim ),서종현 ( Jong Hyun Seo ),이종운 ( Jong Woon Lee ),황동목 ( Dong Mok Hwang ),안재평 ( Jae Pyoung Ahn ),이재철 ( Jae Chul Lee ) 대한금속재료학회(구 대한금속학회) 2016 대한금속·재료학회지 Vol.54 No.5
Both the deformation behaviors and the associated structural evolution of an Al nanowire were observed by conducting tensile testing in TEM. The Al nanowire exhibited a strength close to the theoretical value and a substantial elastic limit of ~5%. Different from bulk-forms of Al, the Al nanowire did not exhibit any quantifiable plastic strain and failed in a brittle manner. This behavior was related to the formation of deformation twins that interlock. Comparative studies were also performed using an Au nanowire to elucidate the effect that the magnitude of the stacking fault energy (SFE) has on the formation of the deformation twins and plasticity. (Received April 28, 2015)