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FATIGUE BEHAVIOR OF CARBURIZED STEEL BEFORE CRACK INITIATION |
CHEN Tjequn Wuhan Institute of Technolgy; VERPOEST I; DERUYTTERE A Department of Metallurgy; Katholieke Universiteit; Leuven; Belgium |
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Cite this article:
CHEN Tjequn Wuhan Institute of Technolgy; VERPOEST I; DERUYTTERE A Department of Metallurgy; Katholieke Universiteit; Leuven; Belgium. FATIGUE BEHAVIOR OF CARBURIZED STEEL BEFORE CRACK INITIATION. Acta Metall Sin, 1991, 27(4): 64-66.
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Abstract The fatigue behavior prior to crack initiation of carburizing steel undergone quench-ing and tempering was observed under tension-tension fatigue test. The steel experiencescoexistence of fatigue softening in the case and fatigue hardening in the core. A transition re-gion near the case depth of the steel divides the whole cross section of a round specimen intotwo parts: the fatigue softening part outwards and the fatigue hardening part inwards. Bothmay be intensified with the increase of the applied maximum cyclic stress and the number ofcycles.
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Received: 18 April 1991
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1 Chen T. Fatigue Crack Propagation in Carburized Steel, Ph D Thesis, K. U., Leuven, Belgium, 1988 2 Polak J, Klesnil M, Lukas P. Mater Sci Eng, 1977; 28: 109--117 3 Feltner C E, Laird C. Acta Metall, 1967; 15: 1621--1632 4 Lukas P. Symp on Fatigue CsVTS, Praha, 1961: 100 5 McGrath J T, Bratina W J, Philos Mag, 1965; 12: 1293--1305 6 Feltner C E. Philes Mag, 1965; 12: 1229--1248# |
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