Effect of Cr–N precipitations on thermal fatigue behaviour of GX-8 steel nitrided layer
Two types of nitrided layers with different nitride precipitates were prepared by salt bath nitriding on the surface of GX-8 steel. The microstructure of the nitrided layers was investigated by SEM, XRD, grazing-incidence XRD and TEM. A cyclic thermal fatigue test system was used to evaluate the inf...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422013394 |
| _version_ | 1811180326259523584 |
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| author | Chang Du Jin Zhang Yong Lian Xiaoyun Ding |
| author_facet | Chang Du Jin Zhang Yong Lian Xiaoyun Ding |
| author_sort | Chang Du |
| collection | DOAJ |
| description | Two types of nitrided layers with different nitride precipitates were prepared by salt bath nitriding on the surface of GX-8 steel. The microstructure of the nitrided layers was investigated by SEM, XRD, grazing-incidence XRD and TEM. A cyclic thermal fatigue test system was used to evaluate the influence of nitrides on the thermal fatigue properties of the two nitrided layers. Under the operation of alternating thermal cycles from ambient temperature to 600 °C on the surface, the nitrided surface with a compound layer composed of ε-Fe2-3N phase and strip-shaped CrN had more cracks and spalling than that of the nitrided layer with nanoscale nitrides. Further analysis revealed that the tessellated stress caused by different thermal expansion coefficients of CrN and α-Fe in the interlayer was responsible for the interlaminar deformation, cracking and spalling of the surface. |
| first_indexed | 2024-04-11T09:01:12Z |
| format | Article |
| id | doaj.art-f9b3a34f3a854579a42c6e76be14e9cb |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T09:01:12Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-f9b3a34f3a854579a42c6e76be14e9cb2022-12-22T04:32:47ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012033333343Effect of Cr–N precipitations on thermal fatigue behaviour of GX-8 steel nitrided layerChang Du0Jin Zhang1Yong Lian2Xiaoyun Ding3Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China; North China Institute of Science and Technology, Lang Fang 065201, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing 100083, China; Corresponding author.Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing 100083, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing 100083, ChinaTwo types of nitrided layers with different nitride precipitates were prepared by salt bath nitriding on the surface of GX-8 steel. The microstructure of the nitrided layers was investigated by SEM, XRD, grazing-incidence XRD and TEM. A cyclic thermal fatigue test system was used to evaluate the influence of nitrides on the thermal fatigue properties of the two nitrided layers. Under the operation of alternating thermal cycles from ambient temperature to 600 °C on the surface, the nitrided surface with a compound layer composed of ε-Fe2-3N phase and strip-shaped CrN had more cracks and spalling than that of the nitrided layer with nanoscale nitrides. Further analysis revealed that the tessellated stress caused by different thermal expansion coefficients of CrN and α-Fe in the interlayer was responsible for the interlaminar deformation, cracking and spalling of the surface.http://www.sciencedirect.com/science/article/pii/S2238785422013394Salt bath nitridingGX-8 steelThermal fatigueCr–N precipitationsTessellated stress |
| spellingShingle | Chang Du Jin Zhang Yong Lian Xiaoyun Ding Effect of Cr–N precipitations on thermal fatigue behaviour of GX-8 steel nitrided layer Journal of Materials Research and Technology Salt bath nitriding GX-8 steel Thermal fatigue Cr–N precipitations Tessellated stress |
| title | Effect of Cr–N precipitations on thermal fatigue behaviour of GX-8 steel nitrided layer |
| title_full | Effect of Cr–N precipitations on thermal fatigue behaviour of GX-8 steel nitrided layer |
| title_fullStr | Effect of Cr–N precipitations on thermal fatigue behaviour of GX-8 steel nitrided layer |
| title_full_unstemmed | Effect of Cr–N precipitations on thermal fatigue behaviour of GX-8 steel nitrided layer |
| title_short | Effect of Cr–N precipitations on thermal fatigue behaviour of GX-8 steel nitrided layer |
| title_sort | effect of cr n precipitations on thermal fatigue behaviour of gx 8 steel nitrided layer |
| topic | Salt bath nitriding GX-8 steel Thermal fatigue Cr–N precipitations Tessellated stress |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422013394 |
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