Author
S. Ramesh Babu
Other affiliations: Anna University, College of Engineering, Guindy
Bio: S. Ramesh Babu is an academic researcher from Sri Venkateswara College of Engineering. The author has contributed to research in topics: Materials science & Metallurgy. The author has an hindex of 4, co-authored 12 publications receiving 54 citations. Previous affiliations of S. Ramesh Babu include Anna University & College of Engineering, Guindy.
Papers
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TL;DR: In this paper, an AZ31B magnesium alloy is chosen, and friction stir processing is performed by varying the process parameters, such as tool axial force, tool traversing speed and tool rotational speed.
36 citations
TL;DR: In this article, the cold metal transfer (CMT) based wire arc additive manufacturing (WAAM) process was used to fabricate the functionally graded Inconel 825 - SS316L wall using the optical micrograph.
Abstract: This work aims to fabricate the functionally graded Inconel 825 - SS316L wall using the Cold Metal Transfer (CMT) based Wire Arc Additive Manufacturing (WAAM) process. The mechanical behavior of the fabricated wall was appraised with the help of room temperature tensile and microhardness tests on the specimens cut from Inconel 825, SS316L, and the interface regions. Fracture morphology revealed the failure of all the specimens after sufficient plastic deformation, indicating ductile fracture. A change in microhardness was observed at the interface region. The optical micrograph revealed a continuous cellular–dendritic and discontinuous cellular–dendritic region in the Inconel 825 region, whereas the SS316L region was comprised of δ ferrite in the primary austenitic (γ) dendrites. The Energy Dispersive Spectroscopy (EDS) line scans of the FGM wall revealed a gradual change in the Ni and Fe content throughout the interface, signifying a successful fabrication of the FGM.
20 citations
TL;DR: In this paper, some shortages in conventional flood cooling technique under heavy cutting settings were noted while machining, therefore, nanofluids (NFs) that have elevated thermal conductivity than traditional...
Abstract: Some shortages in conventional flood cooling technique under heavy cutting settings were noted while machining. Therefore, nanofluids (NF’s) that have elevated thermal conductivity than traditional...
15 citations
TL;DR: In this paper, the effects of friction stir processing parameters such as tool rotational speed, tool traversing speed and tool shoulder diameter on microstructure and tensile properties of extruded AZ31B alloy were investigated.
14 citations
TL;DR: In this paper , the microstructural behavior and mechanical characteristics of Inconel 825, a nickel-based superalloy made through wire arc additive manufacturing (WAAM) and casting, were compared using scanning electron microscopy.
8 citations
Cited by
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TL;DR: In this article, the authors discuss the increasing demand of lightweight structures with exceptional properties elicits materials processing and manufacturing technologies to tailor blanks in order to achieve or enhance those properties.
Abstract: Increasing demand of lightweight structures with exceptional properties elicits materials processing and manufacturing technologies to tailor blanks in order to achieve or enhance those pre...
168 citations
TL;DR: In this paper , the cooling lubrication mechanism and technical iteration motivation of minimum quantity lubrication (MQL) were initially analyzed, and a quantized comparative assessment of cutting force, cutting temperature, tool wear, and surface quality under enhanced environmentally friendly lubrication turning, including parts enhanced by nanoparticles, cryogenic medium, ultrasonic vibration, and textured tools, was performed.
143 citations
TL;DR: In this paper, the effects of pin profiles on the superplastic behavior of FSP tools were investigated. But the results were limited to three different polygonal pin profiles of square, pentagon and hexagon.
104 citations
TL;DR: In this article, five different tool designs have been employed to analyse the influence of rotation speed and traverse speed over the microstructural and tensile properties of dissimilar AA2024 and AA6061 aluminium plates of 5mm thickness.
99 citations
03 Jan 2015-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: Submerged friction-stir processing under cryogenic conditions was employed to fabricate ultrafine-grained nanocomposites with enhanced mechanical characteristics in this article, where a homogenous distribution of reinforcement particles throughout the metal matrix is attained at a rotational speed of 1400-rpm and a traverse velocity of 50mm/min after 4 passes.
Abstract: Submerged friction-stir processing under cryogenic conditions was employed to fabricate ultrafine-grained nanocomposites with enhanced mechanical characteristics. Al–Mg alloy sheet with 3 vol% TiO2 nanoparticles were processed under air (ambient temperature), a water-dry ice medium (~−25 °C), and liquid nitrogen. It is shown that a homogenous distribution of reinforcement particles throughout the metal matrix is attained at a rotational speed of 1400 rpm and a traverse velocity of 50 mm/min after 4 passes. In situ formation of Al3Ti and MgO nanophases during multi-pass processing is shown by transmission electron microscopy. Under the cryogenic cooling condition, ultrafine grains and cellular structures with sizes smaller than 1 μm and 200 nm are attained. It is shown that the formation of an ultrafine-grained structure is accompanied with significant improvement (150–200%) in the mechanical strength. The tensile yield strength of ~170 MPa, elongation of ~22% and Vickers hardness of ~165 HV are attained. A change in the fracture mode from ductile-brittle to fully ductile is presented when the cryogenic processing is employed. A relationship between the grain size and the fracture features is demonstrated. Effects of cooling conditions on the microstructure and mechanical properties of friction stir processed Al-based nanocomposites are addressed.
81 citations