Dynamic shear punching of metallic glass matrix composites
Dynamic shear punching of metallic glass matrix composites
复制标题
金属玻璃基复合材料的动态剪切冲孔
DOI：
10.1016/j.intermet.2012.12.016
复制
发表时间：
2013-05-01
期刊：
影响因子：
4.4
通讯作者：
Chen, M. W.
中科院分区：
文献类型：
--
作者：
Qiao, J. W.;Ye, H. Y.;Chen, M. W.
采用动态剪切冲孔加工Zr36.6Ti31.4Nb7Cu5.9Be19.1金属玻璃基复合材料。冲压成型过程中脆性断裂占主导地位，没有发现宏观裂纹或褶皱，表明表面光洁度良好。一旦屈服，金属玻璃就会发生软化不稳定性，避免剪切带的存在并获得光滑的表面。动态剪切冲裁时重变形区不伴随结晶。各种 BMG 系统的冲孔板的厚度很大程度上取决于剪切强度。此外，还推论出BMG的玻璃化转变温度较高对应于较薄的冲孔板，这为快速加工金属玻璃板提供了理论指导。 Crown 版权所有 (C) 2013 由 Elsevier Ltd 出版。保留所有权利。
Dynamic shear punching is employed to process Zr36.6Ti31.4Nb7Cu5.9Be19.1 metallic glass matrix composites. A brittle fracture dominates during punchforming, and no macroscopic cracks or ruffles can be found, indicative of a good surface finish. The softening instability for metallic glasses happens once the yielding is available, avoiding the existence of shear bands and achieving smooth surfaces. No crystallization is accompanied in the heavy deformation zones during dynamic shear punching. The thickness of punched sheets for various BMG systems is highly dependent on the shear strengths. Furthermore, it is deduced that larger glass-transition temperatures of BMGs correspond to the thinner punched sheets, which provides a theoretical guidance to rapidly process metallic glass sheets. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.