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Title: Hot deformation behaviors and processing maps of B{sub 4}C/Al6061 neutron absorber composites

Abstract

In this study, the hot deformation behaviors of 30 wt.% B{sub 4}C/Al6061 neutron absorber composites (NACs) have been investigated by conducting isothermal compression tests at temperatures ranging from 653 K to 803 K and strain rates from 0.01 to 10 s{sup −1}. It was found that, during hot compression, the B{sub 4}C/Al6061 NACs exhibited a steady flow characteristic which can be expressed by the Zener-Hollomon parameter as a hyperbolic-sine function of flow stress. High average activation energy (185.62 kJ/mol) of B{sub 4}C/Al6061 NACs is noted in current study owing to the high content of B{sub 4}C particle. The optimum hot working conditions for B{sub 4}C/Al6061 NACs are found to be 760–803 K/0.01–0.05 s{sup −1} based on processing map and microstructure evolution. Typical material instabilities are thought to be attributed to void formation, adiabatic shear bands (ASB), particle debonding, and matrix cracking. Finally, the effect of the plastic deformation zones (PDZs) on the microstructure evolution in this 30 wt.% B{sub 4}C/Al6061 composite is found to be very important. - Highlights: •The hot deformation behavior of the 30 wt.% B{sub 4}C/Al6061 NACs was first analyzed. •The 3D efficiency map and the instability map are developed. •The optimum hot working conditions were identifiedmore » and validated by SEM and TEM. •The hot deformation schematic diagram of 30 wt.% B{sub 4}C/Al6061 NACs is developed.« less

Authors:
 [1];  [1];  [1];  [1]
  1. School of Materials Science and Engineering, Taiyuan University Of Technology, Taiyuan 030024 (China)
Publication Date:
OSTI Identifier:
22689710
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 124; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ACTIVATION ENERGY; BORON CARBIDES; COMPRESSION; CRACKING; DEFORMATION; FLOW STRESS; HOT WORKING; MICROSTRUCTURE; NEUTRON ABSORBERS; NEUTRONS; PLASTICITY; PROCESSING; SCANNING ELECTRON MICROSCOPY; SHEAR; STEADY FLOW; STRAIN RATE; STRAINS; TEMPERATURE RANGE 0400-1000 K; TRANSMISSION ELECTRON MICROSCOPY; WORKING CONDITIONS

Citation Formats

Li, Yu-Li, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Wang, Wen-Xian, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Zhou, Jun, Department of Mechanical Engineering, Pennsylvania State University Erie, The Behrend College, Erie, PA 16563, Chen, Hong-Sheng, and Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024. Hot deformation behaviors and processing maps of B{sub 4}C/Al6061 neutron absorber composites. United States: N. p., 2017. Web. doi:10.1016/J.MATCHAR.2016.12.014.
Li, Yu-Li, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Wang, Wen-Xian, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Zhou, Jun, Department of Mechanical Engineering, Pennsylvania State University Erie, The Behrend College, Erie, PA 16563, Chen, Hong-Sheng, & Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024. Hot deformation behaviors and processing maps of B{sub 4}C/Al6061 neutron absorber composites. United States. https://doi.org/10.1016/J.MATCHAR.2016.12.014
Li, Yu-Li, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Wang, Wen-Xian, Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Zhou, Jun, Department of Mechanical Engineering, Pennsylvania State University Erie, The Behrend College, Erie, PA 16563, Chen, Hong-Sheng, and Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024. 2017. "Hot deformation behaviors and processing maps of B{sub 4}C/Al6061 neutron absorber composites". United States. https://doi.org/10.1016/J.MATCHAR.2016.12.014.
@article{osti_22689710,
title = {Hot deformation behaviors and processing maps of B{sub 4}C/Al6061 neutron absorber composites},
author = {Li, Yu-Li and Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024 and Wang, Wen-Xian and Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024 and Zhou, Jun and Department of Mechanical Engineering, Pennsylvania State University Erie, The Behrend College, Erie, PA 16563 and Chen, Hong-Sheng and Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024},
abstractNote = {In this study, the hot deformation behaviors of 30 wt.% B{sub 4}C/Al6061 neutron absorber composites (NACs) have been investigated by conducting isothermal compression tests at temperatures ranging from 653 K to 803 K and strain rates from 0.01 to 10 s{sup −1}. It was found that, during hot compression, the B{sub 4}C/Al6061 NACs exhibited a steady flow characteristic which can be expressed by the Zener-Hollomon parameter as a hyperbolic-sine function of flow stress. High average activation energy (185.62 kJ/mol) of B{sub 4}C/Al6061 NACs is noted in current study owing to the high content of B{sub 4}C particle. The optimum hot working conditions for B{sub 4}C/Al6061 NACs are found to be 760–803 K/0.01–0.05 s{sup −1} based on processing map and microstructure evolution. Typical material instabilities are thought to be attributed to void formation, adiabatic shear bands (ASB), particle debonding, and matrix cracking. Finally, the effect of the plastic deformation zones (PDZs) on the microstructure evolution in this 30 wt.% B{sub 4}C/Al6061 composite is found to be very important. - Highlights: •The hot deformation behavior of the 30 wt.% B{sub 4}C/Al6061 NACs was first analyzed. •The 3D efficiency map and the instability map are developed. •The optimum hot working conditions were identified and validated by SEM and TEM. •The hot deformation schematic diagram of 30 wt.% B{sub 4}C/Al6061 NACs is developed.},
doi = {10.1016/J.MATCHAR.2016.12.014},
url = {https://www.osti.gov/biblio/22689710}, journal = {Materials Characterization},
issn = {1044-5803},
number = ,
volume = 124,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2017},
month = {Wed Feb 15 00:00:00 EST 2017}
}