Strain rate dependent plastic mutation in a bulk metallic glass under compression

Yunfei Xue; Lu Wang; Xingwang Cheng; Fuchi Wang; Huanwu Cheng; Haifeng Zhang; Aiming Wang

doi:10.1016/j.matdes.2011.11.025

Strain rate dependent plastic mutation in a bulk metallic glass under compression

Yunfei Xue^*, Lu Wang, Xingwang Cheng, Fuchi Wang, Huanwu Cheng, Haifeng Zhang, Aiming Wang

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

This paper reported a strain rate dependent plasticity in a Zr-based bulk metallic glass (BMG) under axial compression over a strain rate range (1.6×10^-5-1.6×10^-1s^-1). The fracture strain decreased with increasing strain rate up to 1.6×10^-3s^-1. A " brittle-to-malleable" mutation occurred at strain rate of 1.6×10^-2s^-1, subsequently, the macro plasticity vanished at 1.6×10^-1s^-1. It is proposed that the result is strongly related to the combined action of the applied strain rate, the compression speed, and the propagating speed of the shear band. When the three factors coordinated in the optimal condition, multiple mature shear bands were initiated simultaneously to accommodate the applied strain, which propagated through the specimen and distributed homogeneously in space, dominating the overall plastic deformation by consuming the entire specimen effectively.

Original language	English
Pages (from-to)	284-288
Number of pages	5
Journal	Materials and Design
Volume	36
DOIs	https://doi.org/10.1016/j.matdes.2011.11.025
Publication status	Published - Apr 2012

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10.1016/j.matdes.2011.11.025

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title = "Strain rate dependent plastic mutation in a bulk metallic glass under compression",

abstract = "This paper reported a strain rate dependent plasticity in a Zr-based bulk metallic glass (BMG) under axial compression over a strain rate range (1.6×10-5-1.6×10-1s-1). The fracture strain decreased with increasing strain rate up to 1.6×10-3s-1. A {"} brittle-to-malleable{"} mutation occurred at strain rate of 1.6×10-2s-1, subsequently, the macro plasticity vanished at 1.6×10-1s-1. It is proposed that the result is strongly related to the combined action of the applied strain rate, the compression speed, and the propagating speed of the shear band. When the three factors coordinated in the optimal condition, multiple mature shear bands were initiated simultaneously to accommodate the applied strain, which propagated through the specimen and distributed homogeneously in space, dominating the overall plastic deformation by consuming the entire specimen effectively.",

author = "Yunfei Xue and Lu Wang and Xingwang Cheng and Fuchi Wang and Huanwu Cheng and Haifeng Zhang and Aiming Wang",

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T1 - Strain rate dependent plastic mutation in a bulk metallic glass under compression

AU - Xue, Yunfei

AU - Wang, Lu

AU - Cheng, Xingwang

AU - Wang, Fuchi

AU - Cheng, Huanwu

AU - Zhang, Haifeng

AU - Wang, Aiming

PY - 2012/4

Y1 - 2012/4

N2 - This paper reported a strain rate dependent plasticity in a Zr-based bulk metallic glass (BMG) under axial compression over a strain rate range (1.6×10-5-1.6×10-1s-1). The fracture strain decreased with increasing strain rate up to 1.6×10-3s-1. A " brittle-to-malleable" mutation occurred at strain rate of 1.6×10-2s-1, subsequently, the macro plasticity vanished at 1.6×10-1s-1. It is proposed that the result is strongly related to the combined action of the applied strain rate, the compression speed, and the propagating speed of the shear band. When the three factors coordinated in the optimal condition, multiple mature shear bands were initiated simultaneously to accommodate the applied strain, which propagated through the specimen and distributed homogeneously in space, dominating the overall plastic deformation by consuming the entire specimen effectively.

AB - This paper reported a strain rate dependent plasticity in a Zr-based bulk metallic glass (BMG) under axial compression over a strain rate range (1.6×10-5-1.6×10-1s-1). The fracture strain decreased with increasing strain rate up to 1.6×10-3s-1. A " brittle-to-malleable" mutation occurred at strain rate of 1.6×10-2s-1, subsequently, the macro plasticity vanished at 1.6×10-1s-1. It is proposed that the result is strongly related to the combined action of the applied strain rate, the compression speed, and the propagating speed of the shear band. When the three factors coordinated in the optimal condition, multiple mature shear bands were initiated simultaneously to accommodate the applied strain, which propagated through the specimen and distributed homogeneously in space, dominating the overall plastic deformation by consuming the entire specimen effectively.

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U2 - 10.1016/j.matdes.2011.11.025

DO - 10.1016/j.matdes.2011.11.025

M3 - Article

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SN - 0264-1275

VL - 36

SP - 284

EP - 288

JO - Materials and Design

JF - Materials and Design

ER -

Strain rate dependent plastic mutation in a bulk metallic glass under compression

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