Tuning the performance of bulk metallic glasses by milling artificial holes

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:668

Article

Gong, Feng¹  Chen, Shun Hua²  Ran, Jia Qi¹  Yang, Zhi¹  Ma, Jiang¹ 

[1] Shenzhen Univ, Coll Mechatron & Control Engn, Key Lab Adv Mfg Technol Mold & Die, Shenzhen 518060, Peoples R China

[2] Hong Kong Polytech Univ, Dept Ind & Syst Engn, Adv Mfg Technol Res Ctr, Hong Kong, Hong Kong, Peoples R China

关键词: Bulk metallic glasses;    Artificial holes;    Shear bands;   

DOI  :  10.1016/j.msea.2016.05.048

来源: Elsevier

【 摘 要 】

The mechanical performance of materials is greatly affected and could be tuned by artificial defects, especially for amorphous alloys. In present work, specially designed holes are created for bulk metallic glass and apparent mechanical performance improvement is obtained when compared with the intact ones. The fracture characterization discovers that the inner wall of the artificial hole has a blocking effect to shear bands (SBs), leading to an apparent enhancement of mechanical property. Our results demonstrate that the blocking effect of SBs induced by the designing artificial hole may provide some new sights on the plastic deformation mechanism of metallic glasses rather than the improved plasticity itself. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free