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International Journal of Latest Research in Science and Technology

DOI:10.29111/ijlrst   ISRA Impact Factor:3.35,  Peer-reviewed, Open-access Journal

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INFLUENCE OF HARDNESS PROFILE ON FATIGUE FAILURES OF CASE HARDENED RACES

Research Paper Open Access

International Journal of Latest Research in Science and Technology Vol.4 Issue 5, pp 43-46,Year 2015

INFLUENCE OF HARDNESS PROFILE ON FATIGUE FAILURES OF CASE HARDENED RACES

Matja? Torkar, Bojan Podgornik, Franc Tehovnik

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Received : 23 September 2015; Accepted : 02 October 2015 ; Published : 31 October 2015

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Article No. 10567
Abstract

Different case hardened races, as a part of a constant velocity joint, were dynamic loaded and investigated. The visual inspection revealed the flaking of the surface on some races. The metallography of cross section of case hardened layer detected damaged surface and fatigue cracks below the surface. Both phenomena were results of differences in hardness profile and consequently concentration of stresses below the surface of case hardened layer. The fatigue failures were more pronounced at higher hardness of case hardened layer. For longer life time of the race is important to adjust the thickness and the hardness of case hardened layer to the position of predicted stress concentration below the surface.

Key Words   
Case hardened race; Fatigue cracks; Deformed martensite; Failure analysis

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To cite this article

Matja? Torkar, Bojan Podgornik, Franc Tehovnik , " Influence Of Hardness Profile On Fatigue Failures Of Case Hardened Races ", International Journal of Latest Research in Science and Technology . Vol. 4, Issue 5, pp 43-46 , 2015

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