논문 해외 국제전문학술지(SCI급) Tensile behavior of bulk nanocrystalline aluminum synthesized by hot extrusion of ball-milled powders
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2008-11
- 저자명 H.J. Choi,a S.W. Lee,a J.S. Parkb and D.H. Baea,*
- 학술지명 Scripta Materialia
- 발행처명 ELSEVIER
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
홈페이지
논문 초록 (Abstract)
The deformation behavior of bulk nanocrystalline aluminum down to 48 nm in grain size, produced by hot extrusion of ball-milled powders, has been evaluated by compression and tension tests. Isotropic yield stress increases following the Hall–Petch relationship with decreasing grain size down to 70 nm. However, a positive deviation in the relationship is found for grain sizes below 70 nm, and aluminum with a grain size of 48 nm exhibits a superior yield stress of 500 MPa with ductile failure.