Research Publications

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Processing techniques, microstructural and mechanical properties of additive manufactured 316L stainless steel: Review
(Springer Nature, 2023-06-07) Sharma, Sumit K.; Singh, Abhinav Kumar; Mishra, Rohit Kumar; Shukla, Amarish Kumar; Sharma, Chaitanya
The 316L stainless steel owing to its good combination of mechanical properties, corrosion resistance, fabricability, and weldability finds applications in pharmaceutical, food, and other industries where high corrosion resistance is of prime importance. Nowadays, this alloy is finding increasing favor to produce orthopedic implants using modern techniques like additive manufacturing. In the past, several manufacturing methods have been widely used in the field of aerospace, naval, automobile, biomedical, and other industrial sectors. Traditional methods of manufacturing are the most adaptable and cost-effective of all the processes that have been developed; however, these techniques have limitations to manufacturing complicated design and waste management. In recent years, the additive manufacturing technique is widely used in handling complicated geometrical structures. Additive manufacturing technology has seen a major transformation in the manufacturing world as a result of recent technological advancements. In additive manufacturing, the development process began with polymers, progressed to composites, and finally to nanocomposites. Additive manufacturing offers a small waste production management solution with improved procedures. Additive manufacturing outperforms conventional methods to fabricate high-quality and intricate stainless steel, difficult-to-develop machine components. This paper aims to discuss the principal of various traditional and additive manufacturing techniques used for creating many grades of stainless steel. Consequently, the microstructural and mechanical properties of steels have been examined and compared for various applications, like orthopedic implants, and other engineering applications.
Wire arc additive manufacturing of ER-4043 aluminum alloy: effect of tool speed on microstructure, mechanical properties and parameter optimization
(Springer Nature, 2023-05-23) Kazmi, Kashif Hasan; Sharma, Sumit K.; Das, Alok Kumar; Mandal, Amitava; Shukla, Amarish Kumar; Mandal, Ranjan
Recent technological breakthroughs have had a significant impact on wire arc additive manufacturing (WAAM) technology in the metal manufacturing industry. Current and tool speed are the essential factors influencing the bead quality in WAAM, and experiments were conducted to optimize these parameters. Central composite design was applied for the deposition of beads, and their responses (bead width, height, depth of penetration and surface roughness) were measured using the coordinate measuring machine and 3D profilometer. Analysis of variance was applied to check the validity of the actual and predicted models. In this research, the morphology, microstructure, microhardness and wear behavior of the aluminum alloy ER-4043 were examined. Specimens were deposited using robotic gas metal arc welding (GMAW), using a 1.2 mm wire diameter, a constant current of 250 A and varying tool speed from 7 to 11 mm/s.