A continuum approach for modeling gravitational effects on grain settling and shape distortion during liquid phase sintering of tungsten heavy alloys

2014 ◽  
Vol 65 ◽  
pp. 176-184 ◽  
Author(s):  
José A. Alvarado-Contreras ◽  
Eugene A. Olevsky ◽  
Andrey L. Maximenko ◽  
Randall M. German
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Shape Distortion ◽  
Continuum Approach ◽  
Gravitational Effects ◽  
Heavy Alloys ◽  
Tungsten Heavy Alloys

Liquid-Phase Sintering of Tungsten Heavy Alloys

2010 ◽  
Vol 303-304 ◽  
pp. 55-62 ◽  
Author(s):  
S.F. Moustafa ◽  
S.H. Kaitbay ◽  
G.M. Abdo
Keyword(s):  
Liquid Phase ◽  
Sem Analysis ◽  
Liquid Phase Sintering ◽  
Mechanically Alloyed ◽  
Nickel Iron ◽  
Full Characterization ◽  
Heavy Alloys ◽  
Tungsten Heavy Alloys ◽  
Vacuum Atmosphere ◽  
Sintered Materials

Elemental powders of tungsten, nickel, iron and cobalt of compositions corresponding to (W-3.2Ni-0.8%Fe), (W-3.5Ni-1.5%Fe), and (W-4.5Ni-1.0Fe-1.5%Co) were mechanically alloyed in a tumbler rod mill for 2 hrs. Mechanically alloyed powders were liquid phase sintered at 1500oC for 90 min in vacuum. The sintered materials were heated up to 1150-1200oC in vacuum atmosphere, followed by quenching in water to suppress the impurity segregated at grain boundary. The sintered materials were subjected to cold-working by swaging from 8-30% reduction in area. The swaged specimens were age-hardened at 700oC. Full characterization for both the elemental powders and the sintered tungsten alloys were performed using optical microscopy, SEM analysis, EDS quantitative analysis, X-ray diffraction, hardness and compression testing. This paper will discuss the effects of the elemental powders characterization and the liquid phase sintering parameters on the microstructure and strength of these three tungsten heavy alloys.

scholarly journals Finite Element Simulation of Liquid Phase Sintering with Tungsten Heavy Alloys

2006 ◽  
Vol 47 (11) ◽  
pp. 2745-2752 ◽  
Author(s):  
Seong Jin Park ◽  
Suk Hwan Chung ◽  
John L. Johnson ◽  
Randall M. German
Keyword(s):  
Finite Element ◽  
Liquid Phase ◽  
Finite Element Simulation ◽  
Liquid Phase Sintering ◽  
Heavy Alloys ◽  
Element Simulation ◽  
Tungsten Heavy Alloys
Sign in / Sign up

Export Citation Format

Share Document