Accessible Requires Authentication Published by De Gruyter November 29, 2018

Effect of B4C in Ti-6Al-4V matrix on workability behavior of powder metallurgy composites during cold upsetting

Ramkumar Thulasiram, Selvakumar Mani, Narayanasamy Pandiarajan and Balasundar Pandiarajan

Abstract

The present research evaluates different weight percentages of nano-B4C incorporated into Ti-6Al-4V through a powder metallurgy technique. Nano-B4C weight percentage was set at 0 %, 5 %, and 10 % with a particle size of ≤100 nm. Cylindrical preforms with different initial preform densities were prepared using a suitable die and punch assembly. Further, the preforms were sintered in a muffle furnace with argon atmosphere at a temperature of 1 100 °C for a holding period of 1 hr. Cold deformation experiments were carried out using a 1 000 kN hydraulic press; incremental loading steps of 5 kN were applied on the preform until the first visible cracks appeared on the free surfaces. The experimental results have shown that the powder metallurgy composite with 10 % nano-B4C demonstrates higher densification properties such as axial stress, axial strain, hoop stress, hydrostatic stress, and Poisson's ratio.


*Correspondence address, Dr. T. Ramkumar, Department of Mechanical Engineering, Dr. Mahalingam College of Engineering and Technology, Mahalingam Nagar, Pollachi-642003, India, Tel.: 9994694773, E-mail:

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Received: 2018-01-10
Accepted: 2018-07-20
Published Online: 2018-11-29
Published in Print: 2018-12-10

© 2018, Carl Hanser Verlag, München