K. S. N. Satish Idury

Bio: K. S. N. Satish Idury is an academic researcher from Malla Reddy College Of Engineering & Technology, Hyderabad. The author has contributed to research in topics: Inconel 625. The author has co-authored 1 publications.

Mechanical Behavior of Laser Powder Bed Fusion Processed Inconel 625 Alloy

Abstract: Inconel 625 (IN625) has an excellent suite of high temperature mechanical properties that encourages its use in fabricating jet engine and gas turbine components. Apart from conventional manufacturing methods, recent advances in laser powder bed fusion (LPBF), a laser-based additive manufacturing method, has enjoyed reasonable success in producing crack-free near net shaped components made of IN625. With the purpose of understanding its applications and limitations, the mechanical behavior of LPBF manufactured IN625 is reviewed in detail. First, the microstructural evolution in the as-built state is discussed. Furthermore, the changes in microstructure with respect to various heat treatments are well explained. Correlations between microstructural dependence and process-induced defects on uniaxial tensile characteristics at ambient and elevated temperatures are highlighted. Similarly, microstructural correlations are made with fracture, fatigue life and creep behaviors of LPBF IN625. Finally, the current research gaps and unfulfilled challenges are summarized to postulate future research directions.

Advancing PLA 3D Printing with Laser Polishing: Improving Mechanical Strength, Sustainability, and Surface Quality

Abstract: Three-dimensional (3D) printing of polylactic acid using the fused filament fabrication approach is a widely used additive manufacturing method in various fields, despite the historical issue of substantial surface roughness in fused filament fabrication products. Several strategies have been utilized to minimize the surface roughness of 3D-printed items. However, laser polishing is a novel technique for reducing surface roughness and improving other material qualities. In this study, polylactic acid was examined using the laser polishing method for surface roughness and mechanical properties, such as tensile and flexural strength and laser scan time. Several trials were conducted to determine how changing the laser’s characteristics may affect the materials’ surface quality and mechanical qualities. Before the final test, preliminary tests were performed to determine the lowest potential heat-affected zone. Laser polishing reduced surface roughness by more than 88.8% (from 7.8 µm to 0.87 µm). The tensile strength of the specimen increased by 14.03%, from 39.2 MPa to 44.7 MPa. Polylactic acid had a constant flexural strength of 70.1 MPa before and after polishing, and the laser scan time for samples was 19.4 s. Polished morphologies were studied to learn more about the microstructure. These findings show that laser polishing can improve and modify the surface properties of a fused filament fabrication product, which can benefit the industry and researchers.