Journal or Book Title
Metallurgical and Materials Transactions A
Accurate measurement of residual stress is necessary to obtain reliable predictions of fatigue lifetime and enable estimation of time-to-facture for any given stress level. In this article, relaxation of welding residual stresses as a function of cyclic loading was documented on three common steels: AISI 1008, ASTM A572, and AISI 4142. Welded specimens were subjected to cyclic bending (R = 0.1) at different applied stresses, and the residual stress relaxation existing near the welds was measured as a function of cycles. The steels exhibited very different stress relaxation behaviors during cyclic loadings, which can be related to the differences in the microstructures of the specimens. A phenomenological model, which treats dislocation motion during cyclic loading as being analogous to creep of dislocations, is proposed for estimation of the residual stress relaxation.
Copyright 2013 ASM International. This paper was published in Metallurgical and Materials Transactions A, Vol. 44, Issue 7, pp. 3147-3156 and is made available as an electronic reprint with the permission of ASM International. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplications of any material in this paper for a fee or for commercial purposes, or modification of the content of this paper are prohibited.
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Qian, Zhongyuan; Chumbley, L. Scott; Karakulak, Tugce; and Johnson, Eric, "The Residual Stress Relaxation Behavior of Weldments During Cyclic Loading" (2013). Materials Science and Engineering Publications. 140.