Microstructural evaluation of WC and steel dissimilar bilayered composite obtained by spark plasma sintering
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ORIGINAL ARTICLE
Microstructural evaluation of WC and steel dissimilar bilayered composite obtained by spark plasma sintering Mahadi Hasan 1,2,3
&
Zhenyi Huang 1 & Jingwei Zhao 3,4 & Al Jumlat 3 & Fanghui Jia 3 & Hui Wu 3 & Zhengyi Jiang 3
Received: 14 May 2020 / Accepted: 2 October 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract Spark plasma sintering (SPS) is a powerful technique for consolidating metal powders at a remarkably shorter time with excellent quality. We used this technique for sintering nanocrystalline WC10Co powders and simultaneously bonding with high-strength steel. A series of experiments were conducted in order to find out the optimised set of SPS controlling parameters. The effects of temperatures (1000 to 1150 °C, with a 50 °C interval) in sintering nanocrystalline WC10Co powders and their bonding phenomena with AISI4340 steel were examined at a constant pressure of 80 MPa and a holding time of 5 min. The full density of the carbide powders was achieved at a lower temperature compared with that of conventional techniques. A number of techniques were employed to evaluate the microstructural characteristics of WC and steel bilayered composite and their mechanical properties. For determining the bonding strength of the joint, a novel micro-tensile testing system was adopted. Since such investigation is the first of its kind, to the best knowledge of the authors, where SPS is used to join the tungsten carbide with the steel, this research is expected to provide a valuable future reference for fabricating dissimilar bilayered composite materials. Keywords Spark plasma sintering . Layered composite . Micro-tensile test . Sintering parameters
1 Introduction * Zhengyi Jiang [email protected] Mahadi Hasan [email protected] Zhenyi Huang [email protected] Jingwei Zhao [email protected] Al Jumlat [email protected] 1
School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
2
Department of Textile Engineering, Bangladesh University of Business and Technology, Dhaka 1216, Bangladesh
3
School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
4
College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Spark plasma sintering (SPS) is a popular and potential technique for consolidating metal and ceramic powders. The key benefits of SPS include rapid sintering capability, achievement of full density at a considerably low temperature and an excellent control over the grain sizes. As SPS involves a quick joule heating technique with applied pressure, it is not necessary to achieve eutectic temperature, particularly, when the ultrafine or nanocrystalline powders are used. This indicates that the powders used can achieve full density without rendering liquid state condition. It is worth mentioning that when controlling the temperature in SPS, usually there is a temperature gradient involved inside the sampl
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