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Title: Studies of Shear Band Velocity Using Spatially and Temporally Resolved Measurements of Strain During Quasistatic Compression of Bulk Metallic Glass

Abstract

We have made measurements of the temporal and spatial features of the evolution of strain during the serrated flow of Pd{sub 40}Ni{sub 40}P{sub 20} bulk metallic glass tested under quasistatic, room temperature, uniaxial compression. Strain and load data were acquired at rates of up to 400 kHz using strain gages affixed to all four sides of the specimen and a piezoelectric load cell located near the specimen. Calculation of the displacement rate requires an assumption about the nature of the shear displacement. If one assumes that the entire shear plane displaces simultaneously, the displacement rate is approximately 0.002 m/s. If instead one assumes that the displacement occurs as a localized propagating front, the velocity of the front is approximately 2.8 m/s. In either case, the velocity is orders of magnitude less than the shear wave speed ({approx}2000 m/s). The significance of these measurements for estimates of heating in shear bands is discussed.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
964504
Report Number(s):
LLNL-JRNL-413920
Journal ID: ISSN 1359-6454; ACMAFD; TRN: US200921%%108
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Resource Relation:
Journal Name: Acta Materialia, vol. 57, no. 16, September 1, 2009, pp. 4639-4648; Journal Volume: 57; Journal Issue: 16
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE; COMPRESSION; GLASS; HEATING; SHEAR; STRAIN GAGES; STRAINS; VELOCITY

Citation Formats

Wright, W J, Samale, M, Hufnagel, T, LeBlanc, M, and Florando, J. Studies of Shear Band Velocity Using Spatially and Temporally Resolved Measurements of Strain During Quasistatic Compression of Bulk Metallic Glass. United States: N. p., 2009. Web. doi:10.1016/j.actamat.2009.06.013.
Wright, W J, Samale, M, Hufnagel, T, LeBlanc, M, & Florando, J. Studies of Shear Band Velocity Using Spatially and Temporally Resolved Measurements of Strain During Quasistatic Compression of Bulk Metallic Glass. United States. doi:10.1016/j.actamat.2009.06.013.
Wright, W J, Samale, M, Hufnagel, T, LeBlanc, M, and Florando, J. Mon . "Studies of Shear Band Velocity Using Spatially and Temporally Resolved Measurements of Strain During Quasistatic Compression of Bulk Metallic Glass". United States. doi:10.1016/j.actamat.2009.06.013. https://www.osti.gov/servlets/purl/964504.
@article{osti_964504,
title = {Studies of Shear Band Velocity Using Spatially and Temporally Resolved Measurements of Strain During Quasistatic Compression of Bulk Metallic Glass},
author = {Wright, W J and Samale, M and Hufnagel, T and LeBlanc, M and Florando, J},
abstractNote = {We have made measurements of the temporal and spatial features of the evolution of strain during the serrated flow of Pd{sub 40}Ni{sub 40}P{sub 20} bulk metallic glass tested under quasistatic, room temperature, uniaxial compression. Strain and load data were acquired at rates of up to 400 kHz using strain gages affixed to all four sides of the specimen and a piezoelectric load cell located near the specimen. Calculation of the displacement rate requires an assumption about the nature of the shear displacement. If one assumes that the entire shear plane displaces simultaneously, the displacement rate is approximately 0.002 m/s. If instead one assumes that the displacement occurs as a localized propagating front, the velocity of the front is approximately 2.8 m/s. In either case, the velocity is orders of magnitude less than the shear wave speed ({approx}2000 m/s). The significance of these measurements for estimates of heating in shear bands is discussed.},
doi = {10.1016/j.actamat.2009.06.013},
journal = {Acta Materialia, vol. 57, no. 16, September 1, 2009, pp. 4639-4648},
number = 16,
volume = 57,
place = {United States},
year = {Mon Jun 15 00:00:00 EDT 2009},
month = {Mon Jun 15 00:00:00 EDT 2009}
}