The dynamic properties of B4C/6061Al neutron absorber composites fabricated by power metallurgy

被引：10
|
作者：
Chen, Hongsheng [1 ,2 ]
Wang, Wenxian [2 ,3 ]
Nie, Huihui [4 ]
Zhou, Jun [3 ,5 ]
Li, Yuli [3 ]
Zhang, Peng [3 ]
机构：
[1] Taiyuan Univ Technol, Coll Mech Engn, Taiyuan, Shanxi, Peoples R China
[2] Shanxi Key Lab Adv Magnesium Based Mat, Taiyuan 030024, Shanxi, Peoples R China
[3] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China
[4] Shanxi Inst Energy, Jinzhong, Peoples R China
[5] Penn State Univ, Behrend Coll, Dept Mech Engn, Erie, PA 16563 USA
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2018年 / 34卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Dynamic compressive properties; B4C/6061Al NACs; vacuum; hot pressed sintering; Damage mechanism; Interface; Dislocation; Johnson-Cook; MATRIX COMPOSITES; MECHANICAL-PROPERTIES; BALLISTIC IMPACT; BORON-CARBIDE; MICROSTRUCTURE; BEHAVIOR; B4C; TEMPERATURES; PERFORMANCE; STEEL;
D O I：
10.1080/02670836.2017.1410356
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The dynamic compression properties of B4C/6061Al neutron absorber composites (NACs) with three B4C volume fractions (20-40%), fabricated by power metallurgy, were studied. Compression tests were conducted at strain rates ranging from 760 to 1150 s(-1), using a split Hopkinson pressure bar. The damage mechanism was studied through microstructural analysis. Results show that the B4C particles exhibited a uniform distribution in the 6061Al matrix. The NACs dynamic strength was found to improve with increasing quantities of B4C particles, and with strain rate. The damage mechanisms include particle fracture and interface debonding. Dislocation pile-up was observed at grain boundaries and at the interface between particles and the matrix. A constitutive model under dynamic compression was developed based on the Johnson-Cook model.
引用
收藏
页码：504 / 512
页数：9
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