Low-cycle fatigue behaviour of a low-alloy high-strength steel

Singh, V. ; Raju, P. V. S. S. ; Namboodhiri, T. K. G. ; Rama Rao, P. (1990) Low-cycle fatigue behaviour of a low-alloy high-strength steel International Journal of Fatigue, 12 (4). pp. 289-292. ISSN 0142-1123

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/014211...

Related URL: http://dx.doi.org/10.1016/0142-1123(90)90457-P


The low-cycle fatigue behaviour of a high-strength CrMoV steel has been evaluated in the as-received (AR) and the quenched and tempered (QT) conditions, at room temperature. While the quenching and tempering treatment causes a marked increase in the tensile strength and hardness, it leads to an impairment of the fracture toughness and the low-cycle fatigue (LCF) resistance of the material. A fractographic examination reveals that while there is a large zone of fatigue crack propagation the AR condition, in sharp contrast there is small zone of fatigue crack propagation and a large zone of static fracture in the QT condition. The reduction in fatigue resistance of the QT material is attributed to a loss in fracture toughness and a fall in the values of ε'f and n'.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Low-cycle Fatigue; Quenching and Tempering; Fatigue Resistance; Fracture Toughness
ID Code:41802
Deposited On:31 May 2011 08:47
Last Modified:31 May 2011 08:47

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