Dr. Mohit Kumar Sahu
@itmuniversity.org
Assistant Professor
ITM University Raipur
EDUCATION
PhD (National Institute of Technology Raipur)
M.Tech (National Institute of Technology Tiruchirappalli)
B.E. (Govt. Engineering College Raipur)
RESEARCH INTERESTS
Composite Materials, Machine Learning, Simulation and Modeliing
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Amrit Raj Paul, Manidipto Mukherjee, and Mohit Kumar Sahu
Emerald
Purpose The purpose of this study is to investigate the deposition of SS–Al transitional wall using the wire arc directed energy deposition (WA-DED) process with a Cu interlayer. This study also aims to analyse the metallographic properties of the SS–Cu and Al–Cu interfaces and their mechanical properties. Design/methodology/approach The study used transitional deposition of SS–Al material over each other by incorporating Cu as interlayer between the two. The scanning electron microscope analysis, energy dispersive X-ray analysis, X-ray diffractometer analysis, tensile testing and micro-hardness measurement were performed to investigate the interface characteristics and mechanical properties of the SS–Al transitional wall. Findings The study discovered that the WA-DED process with a Cu interlayer worked well for the deposition of SS–Al transitional walls. The formation of solid solutions of Fe–Cu and Fe–Si was observed at the SS–Cu interface rather than intermetallic compounds (IMCs), according to the metallographic analysis. On the other hand, three different IMCs were formed at the Al–Cu interface, namely, Al–Cu, Al2Cu and Al4Cu9. The study also observed the formation of a lamellar structure of Al and Al2Cu at the hypereutectic phase. The mechanical testing revealed that the Al–Cu interface failed without significant deformation, i.e. < 4.73%, indicating the brittleness of the interface. Originality/value The study identified the formation of HCP–Fe at the SS–Cu interface, which has not been previously reported in additive manufacturing literature. Furthermore, the study observed the formation of a lamellar structure of Al and Al2Cu phase at the hypereutectic phase, which has not been previously reported in SS–Al transitional wall deposition.
Mohit Kumar Sahu and Raj Kumar Sahu
Springer Science and Business Media LLC
Mohit Kumar Sahu and Raj Kumar Sahu
Frontiers Media SA
Lightweight and high-wear performance materials are currently in demand for various advanced applications in areas such as aerospace and automobiles. These demands can be achieved by hybrid aluminum matrix composites (HAMCs), as they possess excellent mechanical and tribological properties which can be customized using more than one reinforcement. Boron carbide (8 wt.%) and fly-ash (2 wt.%) reinforced hybrid aluminum 7075 composite was successfully fabricated using a stir-casting route. Wear is a crucible phenomenon that occurs over the interaction of surfaces and affects the performance of the material. To investigate wear behavior of developed HAMC, dry sliding wear tests were conducted based on the central composite design, taking the specific wear rate as a response parameter. Modeling of wear parameters is crucial, as it helps to predict the value of the wear response at the given set of input parameters without performing experimentation. Response surface method (RSM) was used for the modeling of wear parameters to develop an empirical model of specific wear rate in terms of load, sliding speed, and sliding distance. The high value of the coefficient of determination (R2 = 0.9894) illustrates the goodness of fit of the developed model. Moreover, the optimal condition of wear parameters was determined as 20 N load, 1.5 m/s sliding speed, and 500 m sliding distance; the predicted value of specific wear rate in this set of parameters is 0.2 × 10−5 mm3/N-m. The validation test at optimal conditions was performed and the specific wear rate was found to be 0.205 × 10−5 mm3/N-m, which shows good agreement with the predicted value. The worn-out surface and debris were analyzed using scanning electron microscope (SEM) images and electron dispersive spectrums (EDS) to completely explore the mechanism of wear.
Mohit Kumar Sahu and Raj Kumar Sahu
Elsevier BV
Mohit Kumar Sahu and Raj Kumar Sahu
Springer Science and Business Media LLC
Mohit K Sahu, A Valarmathi, S Baskaran, V Anandakrishnan, and Rupesh K Pandey
SAGE Publications
This work is a novel attempt to identify the optimum process parameters in cold upsetting of Al–TiC metal matrix composites with multiple responses using grey Taguchi approach. The formation of barrel and workability are the important attributes that greatly influence the process of upsetting. Three independently controllable process variables, namely, aspect ratio, friction factor and load, each at four levels are considered to find their optimum levels which yields maximum barrel radius and workability simultaneously. Grey Taguchi analysis has been performed to optimize the levels of input parameters. Both the quality characteristics are improved significantly at the optimal process condition as verified by the confirmation test. The effect of individual process variables on the responses is determined using analysis of variance.
RECENT SCHOLAR PUBLICATIONS
MOST CITED SCHOLAR PUBLICATIONS
Publications
1. Investigation of Mechanical Properties and Optimization of Forming Parameters of Al7075-B4C-Fly Ash Hybrid Aluminium Matrix Composite.
2. Experimental Investigation, Modelling and Optimization of Wear Parameters of B4C and Fly-Ash Reinforced Aluminium Hybrid Composite
3.Optimization of Stirring Parameters Using CFD Simulations for HAMCs Synthesis by Stir Casting Process\Multiobjective optimization of upsetting
parameters of Al–TiC metal matrix composites: A grey Taguchi approach
4. Multiobjective optimization of upsetting parameters of Al–TiC metal matrix composites: A grey Taguchi approach
5.Synthesis, microstructure and hardness of Al 7075/B4C/Fly-ash composite using stir casting method
6.Aluminum Based Hybrid Metal Matrix Composites: A Review Of Selection Philosophy And Mechanical Properties For Advanced Applications
7.Mechanical Properties Of Ramie Polymer Composites: Review
8.Fabrication of Aluminum Matrix Composites by Stir Casting Technique and Stirring Process Parameters Optimization
9.Skills Development through Vocational Training
10.Geo-Exchange Leads toGreen Balan ce in City
RESEARCH OUTPUTS (PATENTS, SOFTWARE, PUBLICATIONS, PRODUCTS)
1. “A device to perform vehicle to vehicle communication to automate the safety and to enhance the driving Application
No. 202221036594 A, Publication Date : 02/12/2022, Issue No. 48/2022.