TY - JOUR
T1 - Hot deformation behaviors and processing maps of B4C/Al6061 neutron absorber composites
AU - Li, Yu Li
AU - Wang, Wen Xian
AU - Zhou, Jun
AU - Chen, Hong Sheng
N1 - Funding Information:
The authors gratefully acknowledge the financial support provided by: “The Key Science and Technology Program of Shanxi Province, China” (Grant No. 20130321024); the College of Materials Science and Engineering at Taiyuan University of Technology (Grant No. 50020201); and Shanxi Zhongtong High-Tech Co. Ltd (Grant No. 20100508).
Publisher Copyright:
© 2016 Elsevier Inc.
PY - 2017/2/1
Y1 - 2017/2/1
N2 - In this study, the hot deformation behaviors of 30 wt.% B4C/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− 1. It was found that, during hot compression, the B4C/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 B4C/Al6061 NACs is noted in current study owing to the high content of B4C particle. The optimum hot working conditions for B4C/Al6061 NACs are found to be 760–803 K/0.01–0.05 s− 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.% B4C/Al6061 composite is found to be very important.
AB - In this study, the hot deformation behaviors of 30 wt.% B4C/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− 1. It was found that, during hot compression, the B4C/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 B4C/Al6061 NACs is noted in current study owing to the high content of B4C particle. The optimum hot working conditions for B4C/Al6061 NACs are found to be 760–803 K/0.01–0.05 s− 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.% B4C/Al6061 composite is found to be very important.
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U2 - 10.1016/j.matchar.2016.12.014
DO - 10.1016/j.matchar.2016.12.014
M3 - Article
AN - SCOPUS:85008178936
SN - 1044-5803
VL - 124
SP - 107
EP - 116
JO - Materials Characterization
JF - Materials Characterization
ER -