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Lasers in Manufacturing and Materials Processing

Published in:

16-11-2020

Laser Cladding of Stellite-6 on AISI 316 L Austenitic Stainless Steel: Empirical-Statistical Modeling and Parameter Optimization

Authors: Jeferson Trevizan Pacheco, Leandro João da Silva, Luiz Delagnelo Barbetta, Henrique Santos Ferreira, Marcelo Taveira Veiga, Renato Forni, Moisés Felipe Teixeira

Published in: Lasers in Manufacturing and Materials Processing | Issue 1/2021

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Abstract

This work aimed to develop an empirical statistical model to determine the optimized parameters for depositing multi-bead single layer Stellite-6 coating on AISI 316 L austenitic stainless steel by laser cladding. A full factorial experimental design was carried out to establish a correlation between processing parameters (laser power, scanning speed and powder feed rate) and geometric characteristics of the coatings (dilution, peak height and surface waviness) through multiple regression. Optimized deposition parameters were estimated by desirability function and experimentally validated. The microstructure and microhardness were assessed as a mean of estimate the performance of optimized coating. The empirical-statistical model and optimization method proposed in this work were demonstrated to be valuable tools for process optimization with low computational cost. This would contribute for a higher material efficiency and reducing post-processing operations, such as machining. As expected for Stellite-6 coatings, the microstructure was composed of dendrites rich in cobalt and interdendritic regions composed of chromium carbides. The microhardness level corroborates the literature, suggesting that the performance was not compromised in favor of the coating geometry.

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Title: Laser Cladding of Stellite-6 on AISI 316 L Austenitic Stainless Steel: Empirical-Statistical Modeling and Parameter Optimization
Authors: Jeferson Trevizan Pacheco
Leandro João da Silva
Luiz Delagnelo Barbetta
Henrique Santos Ferreira
Marcelo Taveira Veiga
Renato Forni
Moisés Felipe Teixeira
Publication date: 16-11-2020
Publisher: Springer US
Published in: Lasers in Manufacturing and Materials Processing / Issue 1/2021
Print ISSN: 2196-7229
Electronic ISSN: 2196-7237
DOI: https://doi.org/10.1007/s40516-020-00132-0

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