Effect of Cr Addition on Properties and Tribological Behavior at Elevated Temperature of Boride Layers Grown on Borosintered Powder Metallurgy Alloys
| Autor: | Ali Günen, Ömer Saltuk Bölükbaşı, Yasin Özgürlük, Derviş Özkan, Okan Odabaş, İlyas Somunkıran |
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| Přispěvatelé: | Mühendislik ve Doğa Bilimleri Fakültesi -- Metalurji ve Malzeme Mühendisliği Bölümü, Günen, Ali, Bölükbaşı, Ömer Saltuk |
| Rok vydání: | 2022 |
| Předmět: |
Chromium
High-temperature wear Fracture-toughness Wear resistance Engineering & Materials Science - Ceramics - Microwave Sintering Tribology Friction Powder metallurgy alloys Iron Materials Science Borides Energy dispersive spectroscopy Chromium Borides Boride layers Surface roughness Sintering Tribological behaviour Powder metallurgy Hardness Chromium additions Densification Materials Chemistry Microstructure Wear behavior Boron Elevated temperature Property Metals and Alloys Fe2b Fracture toughness High temperature wear Condensed Matter Physics Boronizing Wear of materials Cr addition Steel Microhardness Mechanics of Materials Layer formation Metallurgy & Metallurgical Engineering Boriding Scanning electron microscopy |
| Zdroj: | METALS AND MATERIALS INTERNATIONAL |
| ISSN: | 2005-4149 1598-9623 |
| Popis: | This study focused on chromium addition (0 wt%, 3 wt%, 6 wt%, 9 wt% and 12 wt%) on the boride layer formation, microhardness, fracture toughness and elevated temperature friction and wear behaviour of alloys formed by powder metallurgy (P/M). The boride layers obtained on P/M alloys were characterized by examining density, porosity, surface roughness, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray difraction, surface proflometry, microhardness, and fracture toughness. The addition of Cr has a signifcant efect on both boride layer formation and friction-wear behaviour of P/M alloys. Increasing the Cr addition up to 6 wt% has an improving efect on the microhardness, fracture toughness and wear resistance of the P/M alloys, whereas in the case of 9–12 wt% Cr addition causes exfoliation in the boride layer and low fracture toughness, thus reducing wear resistance. Coefcients of friction and wear volume losses at elevated temperatures are higher than room temperature. The best wear resistance at room temperature was obtained in the sample containing 3 wt% Cr with the highest fracture toughness, while the best wear resistance at 250 °C and 500 °C was obtained in the sample containing 6 wt% Cr, where the highest hardness value was obtained. |
| Databáze: | OpenAIRE |
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