Simulation of multiaxial fatigue strength of steel component treated by surface induction hardening and comparison with experimental results
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This paper proposes a method to assess the high-cycle multiaxial fatigue strength of components treated by surface induction hardening (SIH). Surface quenching following surface induction heating is simulated, taking into account the following features of the process: (i) electromagnetic and thermal fields, (ii) phase transformation, and (iii) the residual stress field resulting from the entire process. The fatigue strength of the specimens was simulated using Crossland and Dang-Van criteria; the field of the residual stresses and the fatigue characteristics of both the untreated material and the treated layer (martensite) are considered. Fatigue tests on smooth specimens were carried out to compare simulated results with experimental data. These tests yield information regarding the influence of the thermal treatment on material behaviour and strength, including microstructure evolution and mechanical characteristics, especially in fatigue. For this purpose, residual stresses were analyzed by X-ray diffraction before and after the fatigue tests. Fatigue crack initiation areas (at the specimen’s surface or below) are predicted depending on the depth of the hardened material layer. The simulation of the fatigue strength at 2E6 cycles is in good agreement with experimental results.
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Residual stresses in surface induction hardening of steels: Comparison between experiment and simulation COUPARD, Dominique; PALIN-LUC, Thierry; BRISTIEL, Philippe; JI, Vincent; DUMAS, Christian (Elsevier, 2008)Deep induction hardening has been performed on two batches of smooth cylindrical specimens with a hardening depth respectively around 2 mm and 3 mm. The distributions of axial and circumferential residual stresses are ...
BIDOUARD, Hadrien; PALIN-LUC, Thierry; SAINTIER, Nicolas; DUMAS, Christian; EL DSOKI, Chalid; KAUFMANN, Heinz; SONSINO, Cetin Morris (Carl Hanser Verlag, 2009)Fatigue tests were performed on ferritic bainitic steel notched specimens (Kt = 2.5) under load controlled constant amplitude loading. These tests show that under constant amplitude tension compression loading, periodical ...
BIDOUARD, Hadrien; PALIN-LUC, Thierry; SAINTIER, Nicolas; KAUFMANN, Heinz; DUMAS, Christian; EL DSOKI, Chalid; KAUFMANN, Heinz; SONSINO, Cetin Morris (Carl Hanser Verlag, 2009)Fatigue tests were performed on ferritic bainitic steel notched specimens (Kt = 2.5) under load controlled constant amplitude loading. These tests show that under constant amplitude tension compression loading, periodical ...
Overload effects on a ferritic-baintic steel and a cast aluminium alloy: two very different behaviours SAINTIER, Nicolas; PALIN-LUC, Thierry; EL DSOKI, Chalid; BIDOUARD, Hadrien; KAUFMANN, Heinz; DUMAS, C.; VÖLLMECKE, F.J.; SONSINO, Cetin Morris (Wiley, 2011)Load controlled fatigue tests were performed up to 107 cycles on flat notched specimens (Kt =2.5) under constant amplitude and variable amplitude loadings with and without periodical overloads. Two materials are studied: ...
KAROLCZUK, Aleksander; PALIN-LUC, Thierry (PMTS, 2013)In the present paper, a new approach is developed in order to take into account the stress gradient effect on fatigue life of structural components. The proposed approach is based on the weakest link concept in which the ...