Study on influential factors for process monitoring and control in laser aided additive manufacturing

An overview of Direct Laser Deposition for additive manufacturing; Part I: Transport phenomena, modeling and diagnostics

“…The future of DLD is clearly headed towards real-time DLD control -allowing for adaptive, timevariant operating parameters based on feedback from on-site monitoring. However, application of monitoring/control hardware and software in DLD machines is still not widespread -especially in comparison to traditional laser-based manufacturing processes [183]. Nonetheless, monitoring of DLD processes is currently more mature relative to PBD-L processes (e.g.…”

A Review on Process Monitoring and Control in Metal-Based Additive Manufacturing

“…[98] and [99], the authors develop a closed-loop controller that takes feedback from the monitored temperature of the part and uses it to adjust the laser power and achieve a homo geneous temperature distribution and better dimensional accuracy. The process is known as laser cladding, which uses the same principle in DED processes but is intended for coating existing parts with additional layers of metal rather than creating the 3D physical part.…”

“…te r ia l Publications[38,46,[56][57][58][59][60]63,66,[70][71][72]74,76,87,88,91,113,118,119,137,148,154,[172][173][174]176,177] [29,45,60,62,80,81,84,89,99,[107][108][109]118,120,131,132,141,149,154,155,184] [24,25,27,…”

Additive Manufacturing Using Free Space Deposition in Metals: Experiment and Theory

“…Also in 2013, Bi et al 38 reported using a single-wavelength pyrometer to identify important factors that influence monitoring and control of the LPD process. They studied the effect of geometry, power density, and oxidation on temperature measurements.…”