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논문 기본 정보

자료유형
학술저널
저자정보
S. Ramesh (National Institute of Technology) S. Natarajan (National Institute of Technology) V. J. Sivakumar (National Institute of Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.9
발행연도
2021.9
수록면
3,132 - 3,142 (11page)
DOI
10.1007/s12540-020-00658-0

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초록· 키워드

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Torsional fatigue behaviour of steel is influenced by various significant factors on the surface of steel such as the stress state,the metallurgical conditions and the surface roughness etc. This research presents the results of the studies conducted on thetorsional fatigue life of steel for different surface stresses, conditions and microstructures. Based on the results, inferenceswere derived out of the factors and conditions which are instrumental in increasing the fatigue performance. This researchis done with the purpose of increasing the fatigue performance of power train shafts processed through vacuum carburizingfollowed by second tempering. The fatigue tests were conducted using a bi-directional torsional cyclic loading in a MTSmake torque testing machine. Various researches has been conducted in this paper to find out the impact of surface roughness,second tempering, inter granular oxidation and carbon case depth on the transmission shafts. The existence of surfaceretained austenite has not yielded a notable enhancement in fatigue performance in the power train shaft whereas existenceof martensite with minimum fraction of retained austenite enhanced the fatigue performance significantly from 12,000 to35,000 cycles on ± 3100 N m torque load.

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