Load history effect on FCGR behaviour of 304LN stainless steel

Biswas, Somjeet and Sivaprasad, S and Narasaiah, N and Tarafder, S and Chakraborti, P C (2007) Load history effect on FCGR behaviour of 304LN stainless steel. International Journal of Fatigue, 29 (4). pp. 786-791.

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FCGR behaviour of 304LN stainless steel was studied employing (i) constant R and (ii) constant Kmax cyclic loading envelopes. The closure free crack growth rates obtained by the constant Kmax method were always lower than that of the constant R procedure. Martensitic transformation at the crack tip was observed in both the cases. Qualitatively, the constant Kmax method produced more martensite than the constant R procedure. The martensitic transformation is thought to decrease the applied stress amplitude due to volumetric expansion and strain associated with phase transformation. The dissimilarity in the martensitic transformation and the resultant reduction in the applied stress cycle produced by the two methods were thought to be the reasons for the observed difference in the crack growth rates.

Item Type:Article
Official URL/DOI:http://dx.doi.org/10.1016/j.ijfatigue.2006.06.003
Uncontrolled Keywords:Load history effect; FCGR; 304LN stainless steel; Constant Kmax; Strain induced martensite
Divisions:Material Science and Technology
ID Code:166
Deposited On:19 Oct 2009 15:28
Last Modified:13 Dec 2011 16:46
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