Does the fracture toughness of bulk metallic glasses scatter?

SCRIPTA MATERIALIA

卷:107

Article

Chen, Wen¹  Ketkaew, Jittisa¹  Liu, Ze^1,2  Mota, Rodrigo Miguel Ojeda¹  O'Brien, Kevin¹  da Silva, Caio Sene¹  Schroers, Jan^1,2 

[1] Yale Univ, Dept Mech Engn & Mat Sci, New Haven, CT 06511 USA

[2] Yale Univ, Ctr Res Interface Struct & Phenomena, New Haven, CT 06511 USA

关键词: Fracture toughness;    Bulk metallic glass;    Thermoplastic forming;    Plastic zone;    Shear band;   

DOI  :  10.1016/j.scriptamat.2015.05.003

来源: Elsevier

【 摘 要 】

A method is introduced to determine notch toughness of bulk metallic glasses (BMGs). Through thermoplastic replication of Si molds, unprecedented control in fabricating BMG toughness samples can be achieved and influences such as cooling rate, thermal history, residual stress, sample geometry, and notch precision are drastically reduced. For the 20 Zr44Ti11Cu10Ni10Be25 BMG samples, we measured a notch toughness of 109 +/- 3 MPa root m. Such a much smaller scatter than the previously reported suggests reliable properties of BMGs when thermoplastically formed. (C) 2015 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

【 授权许可】

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