title: Imprinting bulk amorphous alloy at room temperature.
abstract: We present investigations on the plastic deformation behavior of a brittle bulk amorphous alloy by simple uniaxial compressive loading at room temperature. A patterning is possible by cold-plastic forming of the typically brittle Hf-based bulk amorphous alloy through controlling homogenous flow without the need for thermal energy or shaping at elevated temperatures. The experimental evidence suggests that there is an inconsistency between macroscopic plasticity and deformability of an amorphous alloy. Moreover, imprinting of specific geometrical features on Cu foil and Zr-based metallic glass is represented by using the patterned bulk amorphous alloy as a die. These results demonstrate the ability of amorphous alloys or metallic glasses to precisely replicate patterning features onto both conventional metals and the other amorphous alloys. Our work presents an avenue for avoiding the embrittlement of amorphous alloys associated with thermoplastic forming and yields new insight the forming application of bulk amorphous alloys at room temperature without using heat treatment.
authors.affiliation: Rare Metals R&D Group, Korea Institute of Industrial Technology, Incheon 406-840, Korea.
authors.forename: Song-Yi
authors.initials: SY
authors.lastname: Kim
authors.affiliation: Global Technology Center, Samsung Electronics Co., Ltd., Suwon, 443-742, Korea.
authors.forename: Eun-Soo
authors.initials: ES
authors.lastname: Park
authors.affiliation: Division of Materials Sciences and Engineering, Ames Laboratory (USDOE), Ames, Iowa 50011, USA.
authors.forename: Ryan T
authors.initials: RT
authors.lastname: Ott
authors.affiliation: Division of Materials Sciences and Engineering, Ames Laboratory (USDOE), Ames, Iowa 50011, USA.
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Lograsso
authors.affiliation: Department of Materials Science and Engineering, Korea University, Seoul, 136-701, Korea.
authors.forename: Moo-Young
authors.initials: MY
authors.lastname: Huh
authors.affiliation: Department of Metallurgical Engineering, Yonsei University, Seoul, 120-749, Korea.
authors.forename: Do-Hyang
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria.|Department Materials Physics, Montanuniversität Leoben, Jahnstraße 12, A-8700 Leoben, Austria.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Eckert
authors.affiliation: Rare Metals R&D Group, Korea Institute of Industrial Technology, Incheon 406-840, Korea.
authors.forename: Min-Ha
authors.initials: MH
authors.lastname: Lee