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Title: In Situ Observation of Adiabatic Shear Band Formation in Aluminum Alloys

Abstract

We used high-speed X-ray phase contrast imaging and infrared thermal imaging techniques to study the formation processes of adiabatic shear bands in aluminum 7075-T6 and 6061-T6 alloys. A modified compression Kolsky bar setup was used to apply the dynamic loading. A flat hatshaped specimen design was adopted for generating the shear bands at the designated locations. Experimental results show that 7075-T6 exhibits less ductility and a narrower shear band than 6061-T6. Maximum temperatures of 720 K and 770 K were locally determined within the shear band zones for 7075-T6 and 6061-T6 respectively. This local high temperature zone and the resulting thermal instability were found to relate to the shear band formation in these aluminum alloys.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [1]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States). Advanced Photon Source (APS)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
US Army Research Office (ARO); US Army Research Laboratory (USARL); USDOE Office of Science (SC), Basic Energy Sciences (BES); US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1616999
Grant/Contract Number:  
AC02-06CH11357; W911NF1710241; FA9550-16-1- 0315
Resource Type:
Accepted Manuscript
Journal Name:
Experimental Mechanics
Additional Journal Information:
Journal Volume: 60; Journal Issue: 2; Journal ID: ISSN 0014-4851
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Aluminum alloys; Dynamic shear banding; Kolsky Bar; Shear band formation; Temperature; X-ray PCI

Citation Formats

Nie, Y., Claus, B., Gao, J., Zhai, X., Kedir, N., Chu, J., Sun, T., Fezzaa, K., and Chen, W. W. In Situ Observation of Adiabatic Shear Band Formation in Aluminum Alloys. United States: N. p., 2019. Web. https://doi.org/10.1007/s11340-019-00544-w.
Nie, Y., Claus, B., Gao, J., Zhai, X., Kedir, N., Chu, J., Sun, T., Fezzaa, K., & Chen, W. W. In Situ Observation of Adiabatic Shear Band Formation in Aluminum Alloys. United States. https://doi.org/10.1007/s11340-019-00544-w
Nie, Y., Claus, B., Gao, J., Zhai, X., Kedir, N., Chu, J., Sun, T., Fezzaa, K., and Chen, W. W. Sat . "In Situ Observation of Adiabatic Shear Band Formation in Aluminum Alloys". United States. https://doi.org/10.1007/s11340-019-00544-w. https://www.osti.gov/servlets/purl/1616999.
@article{osti_1616999,
title = {In Situ Observation of Adiabatic Shear Band Formation in Aluminum Alloys},
author = {Nie, Y. and Claus, B. and Gao, J. and Zhai, X. and Kedir, N. and Chu, J. and Sun, T. and Fezzaa, K. and Chen, W. W.},
abstractNote = {We used high-speed X-ray phase contrast imaging and infrared thermal imaging techniques to study the formation processes of adiabatic shear bands in aluminum 7075-T6 and 6061-T6 alloys. A modified compression Kolsky bar setup was used to apply the dynamic loading. A flat hatshaped specimen design was adopted for generating the shear bands at the designated locations. Experimental results show that 7075-T6 exhibits less ductility and a narrower shear band than 6061-T6. Maximum temperatures of 720 K and 770 K were locally determined within the shear band zones for 7075-T6 and 6061-T6 respectively. This local high temperature zone and the resulting thermal instability were found to relate to the shear band formation in these aluminum alloys.},
doi = {10.1007/s11340-019-00544-w},
journal = {Experimental Mechanics},
number = 2,
volume = 60,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Fig. 1 Fig. 1: The geometry of hat-shaped specimen and the compression-shear region

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