Browsing by Author "Bhat Panemangalore, D."

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A study on HAZ behaviour in 800 MPa cold rolled and hot rolled steel weld
(Elsevier Ltd, 2021) John, M.; Perka, P.; Udaya Bhat, K.; Bhat Panemangalore, D.
In the automotive sector, the demand for advanced high strength steels (AHSS) is increasing day by day. Based on the application, cold rolled and hot rolled steels are used for various components in a vehicle body. Typically, cold-rolled grades with dual-phase, DP780 steel is used in the form of welded blanks. Hot rolled grades with Ti-Nb microalloy content, like HS800 steel are used in as long members. Welding is an important step to be considered in the design of materials for mass production as required in the automobile sector. In this investigation, Pulsed Gas Metal Arc Welding (P-GMAW) is carried out on both steels with a solid filler wire of strength 800 MPa. Static tensile tests indicated that failure in both steels welds occurred in the heat-affected zone region. The crack initiation and propagation behaviour were compared in both steels. In DP780 steels, the presence of the acicular ferrite and acicular martensite resisted the crack initiation and propagation in the weld region whereas, the chaotic nature of the acicular ferrite in HS800 steel. Microstructural studies revealed that the reason for heat affected zone (HAZ) failure in HS800 steel is due to the presence of hard TiN particles with a size of more than 1 Âµm which causes decohesion in the matrix. In DP780 steel failure is due to the presence of tempered martensite in the subcritical heat affected zone (SCHAZ). This study divulges the influence of filler wire chemistry, dilution, and welding parameters on cold rolled and hot rolled AHSS steels used in the automotive industry. Â© 2021 Elsevier Ltd. All rights reserved.
Corrosion Characteristics of Metal Matrix Composites
(Elsevier, 2021) Bhat Panemangalore, D.; Bhat K, U.
To tackle significant challenges posed by industries and environment with respect to materials degradation, we need to have a clear understanding of the impact of corrosion in different components. Composites are designed for a specialized application using different material combinations. This article presents an overview on different corrosion characteristics of metal matrix composites. Several types of corrosion have been addressed along with different corrosion methodologies. Corrosion of aluminum MMCs, magnesium MMCs, etc., have been discussed, along with different processing related problems. Different aspects involved in determining the corrosion behavior of metal matrix composites have been addressed. © 2021 Elsevier Ltd. All rights reserved.
Recent advances in aluminizing of mild steel plates
(Elsevier, 2024) Huilgol, P.; Bhat Panemangalore, D.; Bhat, K.U.; Bharadishettar, N.
Aluminizing of steels is a surface modification method wherein the steel surface is subjected to thermo-chemical diffusion treatment at temperatures in the range of 700–1000°C. During the treatment, aluminium will diffuse into the surface and subsurface of the steel substrate, producing various aluminide phases. By controlling the process parameters, the type and quantity of aluminide phases can be controlled. The aluminides present beneficial properties, like increased strength and hardness, oxidation resistance, erosion resistance, abrasion resistance, etc. Hence, they are a better candidate material for designing the materials against scratch, erosion, fatigue, wear, oxidation, and corrosion. Many processing routes are available for aluminizing of steels and this entry reviews recent developments in the aluminising of mild steels. © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
Women in Electrochemistry- Contributions, Challenges and Potential Solutions
(IOP Publishing Ltd, 2022) Das, A.; Nagaraj, P.; Bhat Panemangalore, D.
The perspectives gained over the years by women working in electrochemistry are described in order to throw light on their history and current status and achievements in this field, the potential that the future holds, and the role that well-established female electrochemists and the electrochemical societies can play in improving upon the under-representation and under-recognition of women in electrochemistry. Here, a hopeful and optimistic future is presented, in which men and women, both equally contribute to this field, which encompasses our entire life, from corrosion and life of materials to transportation industry. © 2022 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.