Processing effects on fracture toughness of metallic glasses

SCRIPTA MATERIALIA

卷:130

Article

Chen, Wen¹  Zhou, Haofei²  Liu, Ze^1,3  Ketkaew, Jittisa¹  Li, Ning¹  Yurko, James⁴  Hutchinson, Nicholas⁴  Gao, Huajian²  Schroers, Jan^1,5 

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

[2] Brown Univ, Sch Engn, Providence, RI 02912 USA

[3] Wuhan Univ, Dept Engn Mech, Sch Civil Engn, Wuhan 430000, Peoples R China

[4] Materion Corp, Mayfield Hts, OH 44124 USA

[5] Yale Univ, Ctr Res Interface Struct & Phenomena, New Haven, CT 06520 USA

关键词: Metallic glass;    Toughness;    Impurity embrittlement;    Fictive temperature;   

DOI  :  10.1016/j.scriptamat.2016.11.011

来源: Elsevier

【 摘 要 】

Measuring fracture toughness of metallic glasses (MGs) is challenging, and a large scatter has been observed which has been at least partially attributed to varying processing conditions. Here, we investigated the influence of main processing conditions, cooling rate and processing environment, on the fracture toughness of MGs. Through a thermoplastic forming based toughness evaluation approach, we found that processing effects can be dramatic and typically very specific to the alloy. Hence, general predictions of processing effects are challenging and MG specific characterization are required; however we offer some insight how the cooling rate effect can be explained with fictive temperatures. (C) 2016 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

【 授权许可】

Free