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Densification rate and interfacial adhesion of bilayer cemented tungsten carbide and steel

  • Oluwatosin Job Ojo-kupoluyi , Suraya Mohd Tahir , Azmah Hanim Mohamed Ariff , B. T. Hang Tuah Baharudin , Khamirul Amin Matori and Mohd Shamsul Anuar
Published/Copyright: November 25, 2017
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 108 Issue 12

Abstract

Manufacturing tailored materials is commonly faced with the challenge of shrinkage mismatch between layers resulting in delamination. The effects of sintering temperature and carbon variation on the densification and interfacial bond strength of bilayer cemented tungsten carbide and steel processed through powder metallurgy are analyzed. It is revealed through field-emission scanning electron microscopy images that inter-layer diffusion induced by liquid-phase sintering plays a major role in the densification and bonding of layers. Through dimensional analysis of sintered bilayer specimens, the strain rate of cemented tungsten carbide is observed to surpass that of steel. An enhanced densification rate of 6.1 % and M6C (eta carbide) reduction with increased carbon level results in strong interfacial bonding in specimens sintered at 1 280 °C. At 1 295 °C, diffusion accelerates and the axial and radial shrinkage increase by 14.05 % and 13.35 %, respectively, in 93.8 wt.% WC – 6 wt.% Fe – 0.2 wt.% C and 93.2 wt.% Fe – 6 wt.% WC – 0.8 wt.% C, thereby increasing the tendency for complete delamination.

Keywords: Bilayer interface; Sintering; Densification; Shrinkage mismatch; Carbon content
*Correspondence address, Dr. Suraya Mohd Tahir, Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia, E-mail: , Tel.: +60389464383, Fax: +60386567122

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Received: 2017-03-28
Accepted: 2017-07-18
Published Online: 2017-11-25
Published in Print: 2017-12-08

© 2017, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111563
Keywords for this article
Bilayer interface; Sintering; Densification; Shrinkage mismatch; Carbon content

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. First principles, thermal stability and thermodynamic assessment of the binary Ni–W system
  5. Experimental evaluation of forming limit diagram and mechanical properties of nano/ultra-fine grained aluminum strips fabricated by accumulative roll bonding
  6. FSW of bimodal reinforced Al-based composites produced via spark plasma sintering
  7. Modelling analysis and experiments of polycrystalline silicon directional solidification in an annular heating field
  8. Effect of flow, heat transfer and magnetic energy on the grain refinement of 7A04 alloy under electromagnetic pulse
  9. A study on effects of a new two-step strain induced melt activation process on characteristics of Al 7075 alloy
  10. Synthesis and characterization of mechanically alloyed cerium oxide reinforced Al-4.5Mg alloy composite
  11. Densification rate and interfacial adhesion of bilayer cemented tungsten carbide and steel
  12. Short Communications
  13. Cavitation erosion of 17-4 PH stainless steels following sub-zero treatment
  14. Investigation on microstructure and thermal properties of in-situ synthesized Cu–ZrO2 nanocomposites
  15. DGM News
  16. DGM News
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