Dynamic mechanical behavior of 93W–4.9Ni–2.1Fe/95W–2.8Ni–1.2Fe–1Al2O3 heavy alloy composite

Abstract 93W–4.9Ni–2.1Fe/95W–2.8Ni–1.2Fe–1Al2O3 (93WHA/95WHA) composites were fabricated by powder metallurgical routes to meet the demands pertaining to both the penetration and fragmentation performances. Mechanical behavior, adiabatic shear band (ASB) formation and fracture characteristics of the 93WHA/95WHA composites at high strain rate were evaluated using split Hopkinson bars. The relation between composition, microstructure and dynamic mechanical properties was investigated. The dynamic compression and tensile behavior of the 93WHA/95WHA composite are dependent on the 93WHA part and 95WHA part, respectively. The 93WHA part in the 93WHA/95WHA composite is more easily to form narrow and deep ASBs than the 95WHA part, showing excellent penetration performance. Brittle fracture occurs in the 95WHA part of the 93WHA/95WHA composite by W–W grain boundary separation and matrix rupture under dynamic tensile loading because of high W–W contiguity, residual porosity and addition of Al2O3 particles in the 95WHA part, providing conceivable fragmentation performance and secondary destruction.

[1]  Xu Chen,et al.  Nanocrystalline aluminum and iron: Mechanical behavior at quasi-static and high strain rates, and constitutive modeling , 2006 .

[2]  David W. Lischer,et al.  Adiabatic shearband in WHA in high-strain-rate compression , 1998 .

[3]  Min Song,et al.  Dynamic failure and adiabatic shearbands in fine-grain 93W-4.9Ni-2.1Fe alloy with Y2O3 addition under lower high-strain-rate (HSR) compression , 2010 .

[4]  R. German.  Sintering theory and practice , 1996 .

[5]  S. Qu,et al.  Dynamic deformation behavior of 93W-5.6Ni-1.4Fe heavy alloy prepared by spark plasma sintering , 2016 .

[6]  B. Y. Huang,et al.  Microstructure characteristics and a deformation mechanism of fine-grained tungsten heavy alloy under high strain rate compression , 2010 .

[7]  Youpeng Li,et al.  Fabricating fine-grained tungsten heavy alloy by spark plasma sintering of low-energy ball-milled W–2Mo–7Ni–3Fe powders , 2013 .

[8]  Wing Kam Liu,et al.  On criteria for dynamic adiabatic shear band propagation , 2007 .

[9]  N. Durlu,et al.  Swaging of liquid phase sintered 90W-7Ni-3Fe tungsten heavy alloy , 2013 .

[10]  S. Qu,et al.  Fabrication, characterization, and mechanical properties of 93W–4.9Ni–2.1Fe/95W–2.8Ni–1.2Fe–1Al2O3 heavy alloy composites , 2015 .

[11]  T. K. Nandy,et al.  Tensile and impact properties of microwave sintered tungsten heavy alloys , 2014 .

[12]  E. Wang,et al.  Effect of swaging on microstructure and mechanical properties of liquid-phase sintered 93W-4.9(Ni, Co)-2.1Fe alloy , 2014 .

[13]  Minghe Chen,et al.  Dynamic tensile behaviour and deformational mechanism of C5191 phosphor bronze under high strain rates deformation , 2016 .

[14]  G. Vieider,et al.  Development of tungsten armor and bonding to copper for plasma-interactive components , 1998 .

[15]  R. German,et al.  Sintering Atmosphere Effects on the Ductility of W- Ni- Fe Heavy Metals , 1984 .

[16]  S. Luo,et al.  Sintering High Tungsten Content W-Ni-Fe Heavy Alloys by Microwave Radiation , 2013, Metallurgical and Materials Transactions A.

[17]  Sia Nemat-Nasser,et al.  Determination of temperature rise during high strain rate deformation , 1998 .

[18]  A. Khan,et al.  Modeling the mechanical behaviour of 1100-0 aluminum at different strain rates by the bodner-partom model , 1992 .

[19]  T. K. Nandy,et al.  Effect of tungsten content on microstructure and mechanical properties of swaged tungsten heavy alloys , 2013 .

[20]  K. T. Ramesh,et al.  Microstructure and mechanical properties of super-strong nanocrystalline tungsten processed by high-pressure torsion , 2006 .

[21]  Thermal softening of a particlemodified tungsten-based composite under adiabatic compression , 1997 .

[22]  S. Qu,et al.  Fine-grained 93W-5.6Ni-1.4Fe heavy alloys with enhanced performance prepared by spark plasma sintering , 2013 .

[23]  A. Zurek,et al.  A comparison of shear localization susceptibility in U-0.75 wt pct Ti and W-Ni-Fe during high strain rate deformation , 1995 .

[24]  R. Gero,et al.  Some structural effects of plastic deformation on tungsten heavy metal alloys , 2001 .