Feedback control of scanning laser epitaxy (SLE) - Estimation of melt pool temperature and size

Rohan Bansal, Amrita Basak, Suman Das

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The properties of additively manufactured parts significantly depend on the instantaneous temperature distribution and cooling rates in the melt pool and surrounding regions, respectively. The open-loop control of additive manufacturing (AM) cannot compensate for the stochastic variations in the melt pool temperature and size during the process. Closed-loop control can play a significant role in maintaining a desired melt pool temperature by controlling the laser power in situ. However, in order to effectively implement closed-loop control, two critical parameters need to be calculated such as the melt pool temperature and melt pool size. To calculate the melt pool temperature, in this work, a thermal imaging camera calibrated via the emissivity value of the material and validated through a Pyrometer was used. To calculate the melt pool size, two machine vision algorithms are implemented. It was found that the connected component labeling algorithm performed better than the Canny edge detection algorithm.

Original languageEnglish (US)
Title of host publicationMS and T 2019 - Materials Science and Technology 2019
PublisherMaterials Science and Technology
Pages52-59
Number of pages8
ISBN (Electronic)0873397703, 9780873397704
DOIs
StatePublished - Jan 1 2019
EventMaterials Science and Technology 2019, MS and T 2019 - Portland, United States
Duration: Sep 29 2019Oct 3 2019

Publication series

NameMS and T 2019 - Materials Science and Technology 2019

Conference

ConferenceMaterials Science and Technology 2019, MS and T 2019
CountryUnited States
CityPortland
Period9/29/1910/3/19

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Bansal, R., Basak, A., & Das, S. (2019). Feedback control of scanning laser epitaxy (SLE) - Estimation of melt pool temperature and size. In MS and T 2019 - Materials Science and Technology 2019 (pp. 52-59). (MS and T 2019 - Materials Science and Technology 2019). Materials Science and Technology. https://doi.org/10.7449/2019/MST_2019_52_59