Rapid solidification and surface topography for additive manufacturing with beam surface heating

Publication date: June 2020Source: Current Opinion in Chemical Engineering, Volume 28Author(s): Jainagesh Akkaraju SekharThe melt pool dimensions and pool-shapes that are possible with directed beam-heating are explored with a collapsed parameter model, and compared with experimental results. The peak temperatures, temperature gradients and fluid flow velocities/cells are calculated for various beam parameters. The key solidification parameters including the interface velocity are discussed for various beam powers, beam size and interaction times. The new Maximum Entropy Production Rate (MEPR) solidification theory and its successful predictions are reviewed. The ensuing prediction of the scale of the smallest scale of the microstructure is discussed.

Source: Current Opinion in Chemical Engineering - January 31, 2020 Category: Chemistry Source Type: research