Effect of Molybdenum Content on the Corrosion and Microstructure of Low-Ni, Co-Free Maraging Steels
Soliman, Asiful H. Seikh, Hossam Halfa and Mahmoud S. . 2021
Molybdenum (Mo) is an important alloying element in maraging steels. In this study, we
altered the Mo concentration during the production of four cobalt-free maraging steels using an
electroslag refining process. The microstructure of the four forged maraging steels was evaluated
to examine phase contents by optical microscopy, scanning electron microscopy (SEM), and X-ray
diffraction (XRD) analysis. Additionally, we assessed the corrosion resistance of the newly developed
alloys in 3.5% NaCl solution and 1 M H2SO4 solution through potentiodynamic polarization and
electrochemical impedance spectroscopy (EIS) techniques. Furthermore, we performed SEM and
energy-dispersive spectroscopy (EDS) analysis after corrosion to assess changes in microstructure and
Raman spectroscopy to identify the presence of phases on the electrode surface. The microstructural
analysis shows that the formation of retained austenite increases with increasing Mo concentrations.
It is found from corrosion study that increasing Mo concentration up to 4.6% increased the corrosion
resistance of the steel. However, further increase in Mo concentration reduces the corrosion resistance.
Molybdenum (Mo) is an important alloying element in maraging steels. In this study, we
altered the Mo concentration during the production of four cobalt-free maraging steels using an
…
The present investigation deals with a comprehensive study on the production of aluminum based alloys with the incorporation of different alloying elements and their effect on its electrical…
The aim of the present work is to investigate the microstructural behavior of austenite grain size (AGS) during the reheating process of two different API steel grades (X65 and X70). The steel…