Steel 42CrMo4, used in the manufacturing of transmission systems (gears), poses problems in service under specific cyclic stress conditions of the operating mode of its bodies. The treatment of ion nitriding during 20 hours with 520°C applied to 42CrMo4 steel in an untreated state (quenched and tempered) led to the formation of a compound layer (mixture of nitrides ' and carbonitrides with irregular thickness evaluated at 5µm and a diffusion layer of depth equal to 295µm). In the diffusion layer, the presence of inserted nitrogen leads to the increase in hardness (3 times that of basic material) and to the creation of a compressive residual stress field (-400MPa). This superficial hardening does not modify the tensile mechanical characteristics of 42CrMo4 steel but renders it more sensitive to overload in fatigue. As a result, a 0.7% total deformation imposed corresponding to a loading level of 850MPa, constitutes the limit of gain in fatigue obtained by the ion nitriding considered.
Published in | International Journal of Materials Science and Applications (Volume 6, Issue 1) |
DOI | 10.11648/j.ijmsa.20170601.13 |
Page(s) | 18-27 |
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
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Copyright © The Author(s), 2017. Published by Science Publishing Group |
42CrMo4 Steel, Nitriding, Work-Hardening, Residual Stress, Low Cycle Fatigue
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APA Style
Mohamed Ali Terres, Rafik Bechouel, Salem Ben Mohamed. (2017). Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4 Steel. International Journal of Materials Science and Applications, 6(1), 18-27. https://doi.org/10.11648/j.ijmsa.20170601.13
ACS Style
Mohamed Ali Terres; Rafik Bechouel; Salem Ben Mohamed. Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4 Steel. Int. J. Mater. Sci. Appl. 2017, 6(1), 18-27. doi: 10.11648/j.ijmsa.20170601.13
AMA Style
Mohamed Ali Terres, Rafik Bechouel, Salem Ben Mohamed. Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4 Steel. Int J Mater Sci Appl. 2017;6(1):18-27. doi: 10.11648/j.ijmsa.20170601.13
@article{10.11648/j.ijmsa.20170601.13, author = {Mohamed Ali Terres and Rafik Bechouel and Salem Ben Mohamed}, title = {Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4 Steel}, journal = {International Journal of Materials Science and Applications}, volume = {6}, number = {1}, pages = {18-27}, doi = {10.11648/j.ijmsa.20170601.13}, url = {https://doi.org/10.11648/j.ijmsa.20170601.13}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.20170601.13}, abstract = {Steel 42CrMo4, used in the manufacturing of transmission systems (gears), poses problems in service under specific cyclic stress conditions of the operating mode of its bodies. The treatment of ion nitriding during 20 hours with 520°C applied to 42CrMo4 steel in an untreated state (quenched and tempered) led to the formation of a compound layer (mixture of nitrides ' and carbonitrides with irregular thickness evaluated at 5µm and a diffusion layer of depth equal to 295µm). In the diffusion layer, the presence of inserted nitrogen leads to the increase in hardness (3 times that of basic material) and to the creation of a compressive residual stress field (-400MPa). This superficial hardening does not modify the tensile mechanical characteristics of 42CrMo4 steel but renders it more sensitive to overload in fatigue. As a result, a 0.7% total deformation imposed corresponding to a loading level of 850MPa, constitutes the limit of gain in fatigue obtained by the ion nitriding considered.}, year = {2017} }
TY - JOUR T1 - Low Cycle Fatigue Behaviour of Nitrided Layer of 42CrMo4 Steel AU - Mohamed Ali Terres AU - Rafik Bechouel AU - Salem Ben Mohamed Y1 - 2017/01/04 PY - 2017 N1 - https://doi.org/10.11648/j.ijmsa.20170601.13 DO - 10.11648/j.ijmsa.20170601.13 T2 - International Journal of Materials Science and Applications JF - International Journal of Materials Science and Applications JO - International Journal of Materials Science and Applications SP - 18 EP - 27 PB - Science Publishing Group SN - 2327-2643 UR - https://doi.org/10.11648/j.ijmsa.20170601.13 AB - Steel 42CrMo4, used in the manufacturing of transmission systems (gears), poses problems in service under specific cyclic stress conditions of the operating mode of its bodies. The treatment of ion nitriding during 20 hours with 520°C applied to 42CrMo4 steel in an untreated state (quenched and tempered) led to the formation of a compound layer (mixture of nitrides ' and carbonitrides with irregular thickness evaluated at 5µm and a diffusion layer of depth equal to 295µm). In the diffusion layer, the presence of inserted nitrogen leads to the increase in hardness (3 times that of basic material) and to the creation of a compressive residual stress field (-400MPa). This superficial hardening does not modify the tensile mechanical characteristics of 42CrMo4 steel but renders it more sensitive to overload in fatigue. As a result, a 0.7% total deformation imposed corresponding to a loading level of 850MPa, constitutes the limit of gain in fatigue obtained by the ion nitriding considered. VL - 6 IS - 1 ER -