Microstructure and Mechanical Properties of Borided Inconel 625 Superalloy
AUTOR(ES)
Gunen, Ali, Kanca, Erdogan
FONTE
Matéria (Rio J.)
DATA DE PUBLICAÇÃO
22/06/2017
RESUMO
ABSTRACT The Ni- based superalloy Inconel 625 is extensively used owing to its high strength, excellent fabricability, good weldability and outstanding resistance to high temperature corrosion against aggressive environments. However, despite its unique properties and extensive use, its wear resistance is in some cases unsatisfactory. In this study, Inconel 625 was subjected to boriding treatments at different temperature and different durations. Microstructural characterization was made by conventional methods (scanning electron microscopy, optic microscopy, X-ray diffraction analysis) and mechanical characterization was made by microhardness and micro-abrasion wear test. Micro-abrasion wear tests were conducted against a AISI 52100 steel under 5, 7.5 and 10 N load in a 25 wt.% SiC slurry at room temperature. Microstructural results revealed that multi-phase boride layer (nickel boride, chrome boride and iron boride) and silicide layer were formed. The hardness and thickness of the boride layers were found to be 1175–2432 HV 0.1 and, 6.61 – 92.03 μm, respectively. Depending on the boriding temperature and time. In spite of silicide layer formation the wear resistance of borided Inconel 625 alloy increased up to 8 times thanks to the increase in the surface hardness which was caused by boriding process. The boriding treatment caused a transition in the wear mechanism. While grooving was observed in the untreated Inconel 625 samples, mixed (grooving and rolling) and rolling type wear was predominant in the borided samples.
Documentos Relacionados
- Fracture Behavior and Fatigue Performance of Inconel 625
- Corrosion Behavior and Microstructure of Borided Tool Steel
- Effect of thermo-mechanical parameters on microstructure and mechanical properties of microalloyed steels
- Microstructure and Properties of 3D Printed Inconel 718 Joint Brazed with BNi-2 Amorphous Filler Metal
- Microstructure and mechanical properties of WC-Co reinforced with NbC