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The Effect of Tailored Deformation on Fatigue Strength of Austenitic 316L Stainless Steel
Author(s) -
Zhang Meng Xiao,
Pang Jian Chao,
Li Shou Xin,
Zhang Zhen Jun,
Zhang Zhe Feng
Publication year - 2018
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201800554
Subject(s) - materials science , ultimate tensile strength , fatigue limit , work hardening , austenite , deformation (meteorology) , austenitic stainless steel , composite material , metallurgy , microstructure , corrosion
Fatigue failure is one of major problems of the structural components under cyclic loading; however the fatigue test is a time‐consuming and high‐cost process. Therefore, it is better to establish the relationship between the fatigue property and static mechanical properties of materials. The present studies mainly focus on the relationship between fatigue strength and tensile strength of 316L austenitic stainless steel prepared with four different technologies. The rolling results in severe plastic deformation; dislocation multiplication occurs inside the grains, and the elongated grains are parallel to the rolling direction. With the tensile strength increasing, the optimum fatigue strength reaches at an appropriate tensile strength. The fatigue strength is controlled by the tensile strength and the ability of work hardening, and based on this analysis a new method is established to estimate the fatigue strength. The competitive mechanism between fatigue crack initiation and propagation is also proposed to account for the different shapes of S‐N curves.