Book Chapters

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Author: search.filters.author.Kumar, V.

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    Mechanical and Microstructural Properties of Multi-Axially Forged LM6 Aluminium Alloy
    (Pleiades journals, 2019) Sajjan, S.S.; Kulkarni, M.V.; Ramesh, S.; Sharath, P.C.; Rajesh, R.; Kumar, V.
    In the present investigation, commercially available light metal aluminium LM6 alloy was processed by Multi-axial forging (MAF) at ambient temperature. MAF was carried out to an equivalent strain in 0.83, 1.66 and 2.4 i.e., 6 passes, 12 passes and 18 passes, respectively. The mechanical properties like tensile test, compression test, hardness and microstructural characterization were studied in processed and unprocessed samples. Ultimate tensile strength (UTS) and ductility improved from 137 to 185 MPa and 3 to 6.2% for as-received to processed samples, respectively. After 18 passes of MAF, the compression strength (CS) has improved from 342 to 530 MPa. Hardness increased as the number of forging passes increases as compared to unprocessed samples. Optical microscopy images were used to study microstructure observations, the average grain size is reduced from 60 to 2 μm for as-received to processed samples, respectively. Strength and hardness increased because of the grain refinement for the processed samples and the introduction of the high amount of dislocation density into the material during the MAF process. Fracture study was conducted by utilizing scanning electron microscopy, dimples on tensile fracture surfaces revealed that ductile mode of fracture. © 2019, Springer Nature Singapore Pte Ltd.
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    Review on inorganic ion exchange membranes for diverse applications
    (Elsevier, 2023) Vijesh, A.M.; Isloor, A.M.; Kumar, V.
    Ion exchange membranes (IEMs) are extensively employed in many separation processes, especially in water treatment and fuel cells. Separation using IEMs makes the process more environment friendly, greener, and energy efficient. It is also useful in recovering some components of the effluents otherwise that are being left as waste and significantly contributes to the sustainable growth of the society. Inorganic IEMs are superior to the organic IEMs in various aspects. This review chapter addresses the recent developments in the inorganic IEMs in consideration with their preparation and potential applications. © 2024 Elsevier Inc. All rights reserved.
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    Advances of membrane technology in wastewater treatment
    (Elsevier, 2024) Deepthi, P.V.; Viji, K.; Vijesh, A.M.; Isloor, A.M.; Kumar, V.
    Pure water scarcity is becoming a real threat to the modern world. Rapid growth in the textile, paper, and printing industries has caused the production of large quantities of dye effluents, and they must be treated before passing to the water bodies or lands to minimize pollution and environmental impacts. Polymeric membrane-based filtration has been established as an optimal and greener approach for removing hazardous dyes from polluted water. Superior thermal, chemical, and mechanical properties and convenient modifiability made polysulfone (PSF), polyethersulfone (PES), and polyphenylsulfone (PPSU) ideal for the production of membranes for the treatment of dye effluents from industries. This chapter emphasizes the recent developments in modified PSF, PES, and PPSU membranes and their dye rejection properties. © 2025 Elsevier Inc. All rights reserved.