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Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding

In this paper, a TiC reinforcement metal matrix composite coating is produced using nickel and graphite mixing powder on the surface ofTi-6Al-4V alloy by laser radiation. The microstructure of the coatings is investigated by XRD, SEM and EDS. Results show that most of the TiC phase is granular, with...

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Autores principales: Liu, Yanhui, Ding, Jieqiong, Qu, Weicheng, Su, Yu, Yu, Zhishui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5503329/
https://www.ncbi.nlm.nih.gov/pubmed/28772641
http://dx.doi.org/10.3390/ma10030281
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author Liu, Yanhui
Ding, Jieqiong
Qu, Weicheng
Su, Yu
Yu, Zhishui
author_facet Liu, Yanhui
Ding, Jieqiong
Qu, Weicheng
Su, Yu
Yu, Zhishui
author_sort Liu, Yanhui
collection PubMed
description In this paper, a TiC reinforcement metal matrix composite coating is produced using nickel and graphite mixing powder on the surface ofTi-6Al-4V alloy by laser radiation. The microstructure of the coatings is investigated by XRD, SEM and EDS. Results show that most of the TiC phase is granular, with a size of several micrometers, and a few of the TiC phases are petals or flakes. At the cross-section of the coatings, a few special TiC patterns are found and these TiC patterns do not always occur at the observed cross-section. The even distribution of the TiC phase in the coatings confirms that the convection of the laser-melted pool leads to the homogenization of titanium atoms from the molten substrate, and carbon atoms from the preplace powder layer, by the mass transfer. The characteristics of the TiC pattern confirm that the morphology and distribution of the primary TiC phase could be influenced by convection. Two main reasons for this are that the density of the TiC phase is lower than the liquid melt, and that the primary TiC phase precipitates from the pool with a high convection speed at high temperature.
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spelling pubmed-55033292017-07-28 Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding Liu, Yanhui Ding, Jieqiong Qu, Weicheng Su, Yu Yu, Zhishui Materials (Basel) Article In this paper, a TiC reinforcement metal matrix composite coating is produced using nickel and graphite mixing powder on the surface ofTi-6Al-4V alloy by laser radiation. The microstructure of the coatings is investigated by XRD, SEM and EDS. Results show that most of the TiC phase is granular, with a size of several micrometers, and a few of the TiC phases are petals or flakes. At the cross-section of the coatings, a few special TiC patterns are found and these TiC patterns do not always occur at the observed cross-section. The even distribution of the TiC phase in the coatings confirms that the convection of the laser-melted pool leads to the homogenization of titanium atoms from the molten substrate, and carbon atoms from the preplace powder layer, by the mass transfer. The characteristics of the TiC pattern confirm that the morphology and distribution of the primary TiC phase could be influenced by convection. Two main reasons for this are that the density of the TiC phase is lower than the liquid melt, and that the primary TiC phase precipitates from the pool with a high convection speed at high temperature. MDPI 2017-03-11 /pmc/articles/PMC5503329/ /pubmed/28772641 http://dx.doi.org/10.3390/ma10030281 Text en © 2017 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
Liu, Yanhui
Ding, Jieqiong
Qu, Weicheng
Su, Yu
Yu, Zhishui
Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding
title Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding
title_full Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding
title_fullStr Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding
title_full_unstemmed Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding
title_short Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding
title_sort microstructure evolution of tic particles in situ, synthesized by laser cladding
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5503329/
https://www.ncbi.nlm.nih.gov/pubmed/28772641
http://dx.doi.org/10.3390/ma10030281
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