Effect of Cold Isostatic Pressing On The Physical and Mechanical Properties of Tungsten Heavy Alloys

2017 ◽  
Vol 17 (17) ◽  
pp. 1-12
Author(s):  
A. Abdallah ◽  
A. Fayed ◽  
G. Abdo ◽  
M. Sallam
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Cold Isostatic Pressing ◽  
Isostatic Pressing ◽  
Heavy Alloys ◽  
Tungsten Heavy Alloys

Investigation of Application Possibilities of Re-Ni Alloy Powder to Tungsten Heavy Alloys Production

2016 ◽  
Vol 251 ◽  
pp. 14-19 ◽  
Author(s):  
Tomasz Majewski ◽  
Katarzyna Leszczyńska-Sejda
Keyword(s):  
Mechanical Properties ◽  
Production Process ◽  
Alloy Powder ◽  
Thermal Reduction ◽  
Cold Isostatic Pressing ◽  
Optimal Conditions ◽  
Heavy Alloys ◽  
Ni Alloy ◽  
Tungsten Heavy Alloys ◽  
Ammonia Atmosphere

The experiments results connected to possibilities of use of Re-Ni alloy powder for tungsten heavy alloys production were presented in the paper. This powder was obtained by nickel (II) perrhenate reduction under dissociated ammonia atmosphere. The optimal conditions for the thermal reduction for nickel (II) perrhenate were determined. The production process of investigated sinters contained, among others, cold isostatic pressing and two-staged sintering. Selected results of microstructure investigation and mechanical properties of obtained sinters were shown. Performed research indicated that the application of nickel (II) perrhenate to manufacture tungsten heavy alloys resulted in material with the microstructure typical of tungsten heavy alloys and characterized by high mechanical properties.

scholarly journals Effect of Transition Metals Oxides on the Physical and Mechanical Properties of Sintered Tungsten Heavy Alloys

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 825
Author(s):  
Ayman H. Elsayed ◽  
Mohamed A. Sayed ◽  
Osama M. Dawood ◽  
Walid M. Daoush
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Electrode Materials ◽  
Electrical Discharge Machining ◽  
Electrical Contact ◽  
Transition Element ◽  
Physical And Mechanical Properties ◽  
Tungsten Heavy Alloy ◽  
Heavy Alloys ◽  
Tungsten Heavy Alloys

The addition of transition element oxides to tungsten heavy alloys (WHAs) fabricated by powder metallurgy technique provides new materials with higher density and electrical conductivity, which may be adequate in some applications such as kinetic energy penetrators. Additionally, materials with higher electrical conductivity are required for electrical contact applications such as electrical discharge machining (EDM) electrode materials. WHAs were fabricated by compacting its mixed constituents followed by sintering. Ni, Co and Fe are used as binding phases of the tungsten particles and oxides of Zr, Ti and Y are used as oxide dispersing strengthening (ODS) agents of the sintered materials. The results show that all of the chosen factors (i.e., pressure of compaction process, temperature of sintering, type of binding material and type of oxide) have clear effects on all properties of ODS tungsten heavy alloy specimens. The density and electrical conductivity increase with the increase in sintering temperature. Hardness and compression strength were also measured to evaluate the mechanical properties of sintered samples.

Enhancement of Physical and Mechanical Properties of Oxide Dispersion-Strengthened Tungsten Heavy Alloys

2016 ◽  
Vol 47 (5) ◽  
pp. 2387-2395 ◽  
Author(s):  
Walid Mohamed Rashad Daoush ◽  
Ayman Hamada Abdelhady Elsayed ◽  
Omayma Abdel Gawad El Kady ◽  
Mohamed Abdallah Sayed ◽  
Osama Monier Dawood
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion ◽  
Heavy Alloys ◽  
Tungsten Heavy Alloys

Effect of Cold Isostatic Pressing on the Mechanical Properties of WC-8Co Cemented Carbide for Friction Stir Welding Tool

2014 ◽  
Vol 563 ◽  
pp. 107-111
Author(s):  
Chen Zhang ◽  
Bing Liang Liang ◽  
Yun Long Ai ◽  
Chang Hong Liu
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Relative Density ◽  
Cold Isostatic Pressing ◽  
Cemented Carbide ◽  
Vacuum Sintering ◽  
Pressing Method ◽  
Isostatic Pressing ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties

WC-8Co cemented carbide specimens were prepared via vacuum sintering. The effects of cold isostatic pressing (CIP) on microstructure and mechanical properties were investigated. The results show that only WC and Co3W3C (γ-phase) were detected by XRD without any else phases, even though Co. Dense WC-8Co cemented carbide samples were obtained and relative density reached over 98%. The pressing method, instead of pressure, took an important role in the mechanical properties of WC-8Co cemented carbide. KIC and TRS of WC-8Co cemented carbide were improved at least 27% and 24%, respectively, by the use of CIP. WC-8Co cemented carbide with excellent mechanical properties (HRA>93.5, KIC>11MPa·m1/2, TRS>870MPa) was obtained by using CIP.

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