Deformation and fatigue behaviors of carburized automotive gear steel and predictions
The fatigue behavior of carburized components such as automotive transmission gears is very complex due to hardness and microstructure difference, residual stresses and multi-axial stress states developed between the case and the core. In addition, automotive gears in service, commonly used in hel...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Gruppo Italiano Frattura
2016-07-01
|
Series: | Frattura ed Integrità Strutturale |
Subjects: | |
Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero37/numero_37_art_05.pdf |
Summary: | The fatigue behavior of carburized components such as automotive transmission gears is very
complex due to hardness and microstructure difference, residual stresses and multi-axial stress states developed
between the case and the core. In addition, automotive gears in service, commonly used in helical type, are
actually subjected to complex stress conditions such as bending, torsion, and contact stress states. This study
presents experimental and analytical results on deformation behavior of carburized steels, widely used in
automotive gears, under cyclic stress conditions including axial and torsion loadings. Axial fatigue tests and
rotating bending fatigue tests are also included. Predictions of cyclic deformation and fatigue behaviors of the
carburized steel with two-layer model are compared with experimental results. The carburized steel investigated
in this study exhibited cyclic softening under both axial loading and torsional loading. Predicted results with
simple two-layer model for the cyclic deformation and fatigue behaviors were comparatively similar to the
experimental data. |
---|---|
ISSN: | 1971-8993 1971-8993 |