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10.3390/ma14195756
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Article

Powder Metallurgical Processing and Characterization of Molybdenum Addition to Tungsten Heavy Alloys by Spark Plasma Sintering

by
A. Raja Annamalai
1,
A. Muthuchamy
2,
Muthe Srikanth
1,
Senthilnathan Natarajan
1,
Shashank Acharya
1,
Anup Khisti
1 and
Chun-Ping Jen
3,4,*
1
Centre for Innovative Manufacturing Research, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
2
Department of Metallurgical and Materials Engineering, NIT Tiruchirappalli, Tiruchirappalli 620015, Tamil Nadu, India
3
School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
4
Department of Mechanical Engineering, Advanced Institute of Manufacturing for High-Tech Innovations, National Chung Cheng University, Chia-Yi 62102, Taiwan
*
Author to whom correspondence should be addressed.
Materials 2021, 14(19), 5756; https://doi.org/10.3390/ma14195756
Submission received: 25 August 2021 / Revised: 22 September 2021 / Accepted: 27 September 2021 / Published: 2 October 2021
(This article belongs to the Special Issue Spark Plasma Synthesis under High Pressure for Advanced Materials)
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Abstract

The effect of adding molybdenum to the heavy tungsten alloy of W-Ni-Fe on its material characteristics was examined in the current study. The elemental powders of tungsten, iron, nickel, and molybdenum, with a composition analogous to W-3Fe-7Ni-xMo (x = 0, 22.5, 45, 67.5 wt.%), were fabricated using the spark plasma sintering (SPS) technique at a sintering temperature of 1400 °C and under pressure of 50 MPa. The sintered samples were subjected to microstructural characterization and tested for mechanical strength. The smallest grain size of 9.99 microns was observed for the 45W-45Mo alloy. This alloy also gave the highest tensile and yield strengths of 1140 MPa and 763 MPa, respectively. The hardness increased with the increased addition of molybdenum. The high level of hardness was observed for 67.5Mo with a 10.8% increase in the base alloy’s hardness. The investigation resulted in the alloy of 45W-7Ni-3Fe-45Mo, observed to provide optimum mechanical properties among all the analyzed samples.
Keywords: tungsten heavy alloys; powder metallurgy; spark plasma sintering; materials characteristics tungsten heavy alloys; powder metallurgy; spark plasma sintering; materials characteristics

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MDPI and ACS Style

Annamalai, A.R.; Muthuchamy, A.; Srikanth, M.; Natarajan, S.; Acharya, S.; Khisti, A.; Jen, C.-P. Powder Metallurgical Processing and Characterization of Molybdenum Addition to Tungsten Heavy Alloys by Spark Plasma Sintering. Materials 2021, 14, 5756. https://doi.org/10.3390/ma14195756

AMA Style

Annamalai AR, Muthuchamy A, Srikanth M, Natarajan S, Acharya S, Khisti A, Jen C-P. Powder Metallurgical Processing and Characterization of Molybdenum Addition to Tungsten Heavy Alloys by Spark Plasma Sintering. Materials. 2021; 14(19):5756. https://doi.org/10.3390/ma14195756

Chicago/Turabian Style

Annamalai, A. Raja, A. Muthuchamy, Muthe Srikanth, Senthilnathan Natarajan, Shashank Acharya, Anup Khisti, and Chun-Ping Jen. 2021. "Powder Metallurgical Processing and Characterization of Molybdenum Addition to Tungsten Heavy Alloys by Spark Plasma Sintering" Materials 14, no. 19: 5756. https://doi.org/10.3390/ma14195756

APA Style

Annamalai, A. R., Muthuchamy, A., Srikanth, M., Natarajan, S., Acharya, S., Khisti, A., & Jen, C.-P. (2021). Powder Metallurgical Processing and Characterization of Molybdenum Addition to Tungsten Heavy Alloys by Spark Plasma Sintering. Materials, 14(19), 5756. https://doi.org/10.3390/ma14195756

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