Advanced   Register
IMR OpenIR  > 中国科学院金属研究所  > 期刊论文

题名: Gradual shear band cracking and apparent softening of metallic glass under low temperature compression
作者: Wu, S. J.;  Wang, X. D.;  Qu, R. T.;  Zhu, Z. W.;  Liu, Z. Q.;  Zhang, H. F.;  Zhang, Z. F.
发表日期: 2017-8-1
摘要: Metallic glasses (MGs) usually exhibit synchronously enhanced plasticity and strength with decreasing the testing temperature. Although great efforts have been made, why MGs show better plasticity at low temperature remains unclear. In this work, the shear band cracking and fracture mechanism of a relatively brittle TiZr-based MG was investigated through methods of low temperature compression and 3D X-ray tomography. Pronounced apparent softening and profuse internal shear-band cracks were observed along with the improved plasticity, enhanced yield strength, decreased average softening rate, and reduced area of vein pattern as decreasing the testing temperature. Moreover, the fracture features can be correlated well with the compressive properties; and the true rupture stress that is carried by the still-bonded part of major shear band was found to be very close to the yield strength, demonstrating that the apparent softening should mainly originate from the cracking rather than dilation of shear band. The decreased softening rate can be fitted by a diffusion model, implying reduced atomic mobility and increased cracking resistance. Consequently, the improved plasticity of TiZr-MG at low temperature was attributed to the suppression of instant fracture and the enhanced resistance to shear band cracking, rather than the change of shear band density.
Appears in Collections:中国科学院金属研究所_期刊论文

Files in This Item:

There are no files associated with this item.

Recommended Citation:
Wu, S. J.,Wang, X. D.,Qu, R. T.,et al. Gradual Shear Band Cracking And Apparent Softening Of Metallic Glass Under Low Temperature Compression[J]. Intermetallics,2017,87:45-54.

SCI Citaion Data:
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Wu, S. J.]'s Articles
 [Wang, X. D.]'s Articles
 [Qu, R. T.]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Wu, S. J.]‘s Articles
 [Wang, X. D.]‘s Articles
 [Qu, R. T.]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to  Add to Digg  Add to Reddit 
所有评论 (0)
内 容:
Email:  *
验证码:   刷新
标 题:
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.



Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院金属研究所  -Feedback
Powered by CSpace