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Laser Surface Alloying of Austenitic 316L Steel with Boron and Some Metallic Elements: Microstructure

Austenitic 316L steel is known for its good oxidation resistance and corrosion behavior. However, the poor wear protection is its substantial disadvantage. In this study, laser surface alloying with boron and some metallic elements was used in order to form the surface layers of improved wear behavi...

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Autores principales: Kulka, Michał, Mikołajczak, Daria, Makuch, Natalia, Dziarski, Piotr, Przestacki, Damian, Panfil-Pryka, Dominika, Piasecki, Adam, Miklaszewski, Andrzej
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7663681/
https://www.ncbi.nlm.nih.gov/pubmed/33138156
http://dx.doi.org/10.3390/ma13214852
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author Kulka, Michał
Mikołajczak, Daria
Makuch, Natalia
Dziarski, Piotr
Przestacki, Damian
Panfil-Pryka, Dominika
Piasecki, Adam
Miklaszewski, Andrzej
author_facet Kulka, Michał
Mikołajczak, Daria
Makuch, Natalia
Dziarski, Piotr
Przestacki, Damian
Panfil-Pryka, Dominika
Piasecki, Adam
Miklaszewski, Andrzej
author_sort Kulka, Michał
collection PubMed
description Austenitic 316L steel is known for its good oxidation resistance and corrosion behavior. However, the poor wear protection is its substantial disadvantage. In this study, laser surface alloying with boron and some metallic elements was used in order to form the surface layers of improved wear behavior. The microstructure was studied using OM, SEM, XRD, and EDS techniques. The laser-alloyed layers consisted of the only re-melted zone (MZ). The hard ceramic phases (Fe(2)B, Cr(2)B, Ni(2)B, or Ni(3)B borides) occurred in a soft austenitic matrix. The relatively high overlapping (86%) resulted in a uniform thickness and homogeneous microstructure of the layers. All the laser-alloyed layers were free from defects, such as microcracks or gas pores, due to the use of relatively high dilution ratios (above 0.37). The heat-affected zone (HAZ) wasn’t visible in the microstructure because of the extended stability of austenite up to room temperature and no possibility to change this structure during fast cooling. The use of the mixtures of boron and selected metallic elements as the alloying materials caused the diminished laser beam power in order to obtain the layers of acceptable quality. The thickness of laser-alloyed layers (308–432 μm) was significantly higher than that produced using diffusion boriding techniques.
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spelling pubmed-76636812020-11-14 Laser Surface Alloying of Austenitic 316L Steel with Boron and Some Metallic Elements: Microstructure Kulka, Michał Mikołajczak, Daria Makuch, Natalia Dziarski, Piotr Przestacki, Damian Panfil-Pryka, Dominika Piasecki, Adam Miklaszewski, Andrzej Materials (Basel) Article Austenitic 316L steel is known for its good oxidation resistance and corrosion behavior. However, the poor wear protection is its substantial disadvantage. In this study, laser surface alloying with boron and some metallic elements was used in order to form the surface layers of improved wear behavior. The microstructure was studied using OM, SEM, XRD, and EDS techniques. The laser-alloyed layers consisted of the only re-melted zone (MZ). The hard ceramic phases (Fe(2)B, Cr(2)B, Ni(2)B, or Ni(3)B borides) occurred in a soft austenitic matrix. The relatively high overlapping (86%) resulted in a uniform thickness and homogeneous microstructure of the layers. All the laser-alloyed layers were free from defects, such as microcracks or gas pores, due to the use of relatively high dilution ratios (above 0.37). The heat-affected zone (HAZ) wasn’t visible in the microstructure because of the extended stability of austenite up to room temperature and no possibility to change this structure during fast cooling. The use of the mixtures of boron and selected metallic elements as the alloying materials caused the diminished laser beam power in order to obtain the layers of acceptable quality. The thickness of laser-alloyed layers (308–432 μm) was significantly higher than that produced using diffusion boriding techniques. MDPI 2020-10-29 /pmc/articles/PMC7663681/ /pubmed/33138156 http://dx.doi.org/10.3390/ma13214852 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kulka, Michał
Mikołajczak, Daria
Makuch, Natalia
Dziarski, Piotr
Przestacki, Damian
Panfil-Pryka, Dominika
Piasecki, Adam
Miklaszewski, Andrzej
Laser Surface Alloying of Austenitic 316L Steel with Boron and Some Metallic Elements: Microstructure
title Laser Surface Alloying of Austenitic 316L Steel with Boron and Some Metallic Elements: Microstructure
title_full Laser Surface Alloying of Austenitic 316L Steel with Boron and Some Metallic Elements: Microstructure
title_fullStr Laser Surface Alloying of Austenitic 316L Steel with Boron and Some Metallic Elements: Microstructure
title_full_unstemmed Laser Surface Alloying of Austenitic 316L Steel with Boron and Some Metallic Elements: Microstructure
title_short Laser Surface Alloying of Austenitic 316L Steel with Boron and Some Metallic Elements: Microstructure
title_sort laser surface alloying of austenitic 316l steel with boron and some metallic elements: microstructure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7663681/
https://www.ncbi.nlm.nih.gov/pubmed/33138156
http://dx.doi.org/10.3390/ma13214852
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