Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
659 0 |
SM ISO690:2012 MULONE, A., NICOLENCO, Aliona, IMAZ, Naroa, FORNELL, Jordina, SORT, Jordi Julia, KLEMENT, Uta. Effect of heat treatments on the mechanical and tribological properties of electrodeposited Fe–W/Al2O3 composites. In: Wear, 2020, nr. 448(449), p. 0. ISSN 0043-1648. DOI: https://doi.org/10.1016/j.wear.2020.203232 |
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Wear | ||||||
Numărul 448(449) / 2020 / ISSN 0043-1648 | ||||||
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DOI:https://doi.org/10.1016/j.wear.2020.203232 | ||||||
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Rezumat | ||||||
In this study, the influence of heat treatment on the mechanical and tribological properties of electrodeposited Fe–W/Al2O3 composite coatings is studied. The properties of the as-deposited and annealed composites are compared with those of electrodeposited hard chromium coatings. The amorphous structure of the Fe–W matrix transforms into a mixed amorphous-crystalline structure upon annealing at 600 °C for 1 h. The observed microstructural transformations result in a substantial increase of both the hardness and the reduced Young's modulus of the Fe–W/Al2O3 composite coatings, reaching values of 16.3 GPa and 191.7 GPa, respectively. The results on the wear resistance studied under dry friction using ball-on-disc sliding tests show that a low wear rate is obtained for both as-deposited and annealed composite coatings, i.e. ~1.5 × 10−6 mm3/Nm. In contrast, the heat treatments are detrimental for both the hardness and wear resistance of hard chromium coatings. As a consequence, the mechanical and wear properties of the electrodeposited Fe–W/Al2O3 composite coatings, especially after annealing, are superior to the properties of hard chromium coatings. Hence, Fe–W/Al2O3 composite coatings can be considered as a valid and sustainable alternative to hard chromium coatings, particularly in applications where these materials may be exposed to high temperatures. |
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Cuvinte-cheie Composite coatings, Electrodeposition, Heat treatment, Iron-tungsten alloys, wear resistance |
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