28 research outputs found
Machining Characteristics and Corrosion Behavior of Grain Refined AZ91 Mg Alloy Produced by Friction Stir Processing: Role of Tool Pin Profile
No full textInvestigation on the Structural and Wear Characteristics of Mg AZ91/Fly Ash Surface Composites Fabricated by Friction Stir Processing
No full textMechanical, machining and corrosion properties of Al5083‐carbon nanotubes composite produced by friction stir processing
No full textAn investigation on the hardness and corrosion behavior of MWCNT/Mg composites and grain refined Mg
No full textIn the present work, multi walled carbon nanotubes (MWCNT) reinforced magnesium (Mg) matrix composite was fabricated by friction stir processing (FSP) with an aim to explore its mechanical and electrochemical behavior. Microstructural observations showed that the thickness of the produced composite layer was in the range of 2500 µm. FSP resulted uniform distribution of CNT near the surface while agglomerated layers in the subsurface. Grain refinement of Mg achieved by FSP improved the hardness but significant enhancement in the hardness value was observed for FSPed MWCNT/Mg composites. Potentiodynamic polarization studies revealed that the increase in corrosion current density was observed for MWCNT/Mg composite compared with grain refined Mg and pure Mg, implying the significance of secondary phase (MWCNT) in decreasing the corrosion resistance of the composite. Keywords: Friction stir processing, MWCNT/Mg composite, Hardness, Basal texture, Corrosion resistanc
Developing Mg-Zn surface alloy by friction surface allosying: In vitro degradation studies in simulated body fluids
No full textCrushing Behavior of Thick Circular High Strength Aluminum Tube Against Quasi-static Axial Loading
No full textAssessing the Material-Dependent Stress Distribution in Fractured Bone and Orthopedic Fixing Plate by Finite Element Analysis
No full textEffect of Aging Duration on the Microstructure and Corrosion Characteristics of 17-4 PH Stainless Steel
No full textHeat treatment plays a critical role in inducing key microstructural changes necessary to enhance corrosion resistance of 17-4 PH stainless steel (SS). During the process, precipitates form within the metal matrix, contributing to the strength of the martensitic steel. Inconsistencies in the literature concerning the response of 17-4PH SS to heat treatment have been noted. Therefore, this study examines the impact of aging duration on microstructural characteristics, microhardness, and corrosion resistance of material. The solution heat-treatment process consisted of heating the material to 1040 °C for one hour and rapid cooling in water. Subsequently, aging treatment was carried out at 480 °C for varying durations of 1 hour, 4 hours, 8 hours, and 32 hours. Corrosion rates were measured through electrochemical tests using Tafel extrapolation method in a 3.5 wt.% NaCl solution. The findings indicated that aging durations had a significant effect on corrosion resistance, detailed microstructural analysis helped correlate corrosion behaviour with phase changes and precipitation formation. This study offers valuable insights for optimizing heat treatment processes to improve the durability and performance of 17-4PH SS in NaCl corrosion medium
