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Effect of Deep Cryogenic Treatment on the Tensile Behavior of AISI 8620 Gear Steel

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Effect of Deep Cryogenic Treatment on the Tensile Behavior of AISI 8620 Gear Steel


Prasenjit Ghosh

https://doi.org/10.31142/ijtsrd8303



Prasenjit Ghosh "Effect of Deep Cryogenic Treatment on the Tensile Behavior of AISI 8620 Gear Steel" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-2, February 2018, pp.31-35, URL: https://www.ijtsrd.com/papers/ijtsrd8303.pdf

Life expectancy of mechanical systems is always dependent on the most critical component of the system. Gears represent the most highly stressed parts of a heavy vehicle; these are typically made of AISI 8620 steel. This paper investigates the influence of cryogenic treatment on the tensile properties of hardened tempered AISI 8620 steel. In the current research study, specimens of gear steel (AISI 8620) were hardened at 1193K, tempered at 473K and then cryogenically treated at 88K followed by soft tempering in the oven at 373K for 1hr to relieve cooling stresses. A comparative study on the effects of deep cryogenic treatment (DCT) on hardened tempered specimens and conventional heat treated specimens was made by means of tension testing. This test was conducted as per ASTM standard E 8M. The present results confirms that the tensile behavior is marginally reduced after cryogenic treatment for AISI 8620 steel when compared with conventional hardened tempered steel. Stereographic image analysis of the fracture surface indicates the presence of dimples and flat regions are more common in DCT – processed material.

Deep cryogenic treatment, Stereographic image analysis, Tensile strength, AISI 8620


IJTSRD8303
Volume-2 | Issue-2, February 2018
31-35
IJTSRD | www.ijtsrd.com | E-ISSN 2456-6470
Copyright © 2019 by author(s) and International Journal of Trend in Scientific Research and Development Journal. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0) (http://creativecommons.org/licenses/by/4.0)

International Journal of Trend in Scientific Research and Development - IJTSRD having online ISSN 2456-6470. IJTSRD is a leading Open Access, Peer-Reviewed International Journal which provides rapid publication of your research articles and aims to promote the theory and practice along with knowledge sharing between researchers, developers, engineers, students, and practitioners working in and around the world in many areas like Sciences, Technology, Innovation, Engineering, Agriculture, Management and many more and it is recommended by all Universities, review articles and short communications in all subjects. IJTSRD running an International Journal who are proving quality publication of peer reviewed and refereed international journals from diverse fields that emphasizes new research, development and their applications. IJTSRD provides an online access to exchange your research work, technical notes & surveying results among professionals throughout the world in e-journals. IJTSRD is a fastest growing and dynamic professional organization. The aim of this organization is to provide access not only to world class research resources, but through its professionals aim to bring in a significant transformation in the real of open access journals and online publishing.

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