Open AccessEffects of Si concentrations on microstructure and mechanical properties of as-cast Co–Cr–Mo alloys
Author(s) -
Phacharaphon Tunthawiroon,
Akihiko Chiba
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/635/1/012006
Subject(s) - intermetallic , microstructure , materials science , ductility (earth science) , metallurgy , ultimate tensile strength , phase (matter) , alloy , creep , chemistry , organic chemistry
This research investigates the effects of different Si concentrations on the microstructure and mechanical properties of Co–Cr–Mo–xSi alloys. The Si concentration (x) was 0.1, 0.5, 1.0, 3.0 and 5.0 wt%. The mechanical properties of the experimental heat-treated Co–Cr–Mo–xSi alloys was determined by hardness and tensile tests. The microstructure was analyzed using SEM. The microstructure analysis revealed that Si concentration played a role in the formation of the intermetallic phase of Co–Cr–Mo–xSi alloys. The presence of the intermetallic phase significantly decreased the ductility of the experimental alloys. However, the hardness was improved and was increased directly proportional to the fraction of the intermetallic phase precipitating in the Co–Cr–Mo–xSi alloys.