Cargando…

Densification, Tailored Microstructure, and Mechanical Properties of Selective Laser Melted Ti–6Al–4V Alloy via Annealing Heat Treatment

This work investigated the influence of process parameters on the densification, microstructure, and mechanical properties of a Ti–6Al–4V alloy printed by selective laser melting (SLM), followed by annealing heat treatment. In particular, the evolution mechanisms of the microstructure and mechanical...

Descripción completa

Detalles Bibliográficos
Autores principales: Wang, Di, Wang, Han, Chen, Xiaojun, Liu, Yang, Lu, Dong, Liu, Xinyu, Han, Changjun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8875346/
https://www.ncbi.nlm.nih.gov/pubmed/35208455
http://dx.doi.org/10.3390/mi13020331
_version_ 1784657890884190208
author Wang, Di
Wang, Han
Chen, Xiaojun
Liu, Yang
Lu, Dong
Liu, Xinyu
Han, Changjun
author_facet Wang, Di
Wang, Han
Chen, Xiaojun
Liu, Yang
Lu, Dong
Liu, Xinyu
Han, Changjun
author_sort Wang, Di
collection PubMed
description This work investigated the influence of process parameters on the densification, microstructure, and mechanical properties of a Ti–6Al–4V alloy printed by selective laser melting (SLM), followed by annealing heat treatment. In particular, the evolution mechanisms of the microstructure and mechanical properties of the printed alloy with respect to the annealing temperature near the β phase transition temperature were investigated. The process parameter optimization of SLM can lead to the densification of the printed Ti–6Al–4V alloy with a relative density of 99.51%, accompanied by an ultimate tensile strength of 1204 MPa and elongation of 7.8%. The results show that the microstructure can be tailored by altering the scanning speed and annealing temperature. The SLM-printed Ti–6Al–4V alloy contains epitaxial growth β columnar grains and internal acicular martensitic α′ grains, and the width of the β columnar grain decreases with an increase in the scanning speed. Comparatively, the printed alloy after annealing in the range of 750–1050 °C obtains the microstructure consisting of α + β dual phases. In particular, network and Widmanstätten structures are formed at the annealing temperatures of 850 °C and 1050 °C, respectively. The maximum elongation of 14% can be achieved at the annealing temperature of 950 °C, which was 79% higher than that of as-printed samples. Meanwhile, an ultimate tensile strength larger than 1000 MPa can be maintained, which still meets the application requirements of the forged Ti–6Al–4V alloy.
format Online
Article
Text
id pubmed-8875346
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-88753462022-02-26 Densification, Tailored Microstructure, and Mechanical Properties of Selective Laser Melted Ti–6Al–4V Alloy via Annealing Heat Treatment Wang, Di Wang, Han Chen, Xiaojun Liu, Yang Lu, Dong Liu, Xinyu Han, Changjun Micromachines (Basel) Article This work investigated the influence of process parameters on the densification, microstructure, and mechanical properties of a Ti–6Al–4V alloy printed by selective laser melting (SLM), followed by annealing heat treatment. In particular, the evolution mechanisms of the microstructure and mechanical properties of the printed alloy with respect to the annealing temperature near the β phase transition temperature were investigated. The process parameter optimization of SLM can lead to the densification of the printed Ti–6Al–4V alloy with a relative density of 99.51%, accompanied by an ultimate tensile strength of 1204 MPa and elongation of 7.8%. The results show that the microstructure can be tailored by altering the scanning speed and annealing temperature. The SLM-printed Ti–6Al–4V alloy contains epitaxial growth β columnar grains and internal acicular martensitic α′ grains, and the width of the β columnar grain decreases with an increase in the scanning speed. Comparatively, the printed alloy after annealing in the range of 750–1050 °C obtains the microstructure consisting of α + β dual phases. In particular, network and Widmanstätten structures are formed at the annealing temperatures of 850 °C and 1050 °C, respectively. The maximum elongation of 14% can be achieved at the annealing temperature of 950 °C, which was 79% higher than that of as-printed samples. Meanwhile, an ultimate tensile strength larger than 1000 MPa can be maintained, which still meets the application requirements of the forged Ti–6Al–4V alloy. MDPI 2022-02-19 /pmc/articles/PMC8875346/ /pubmed/35208455 http://dx.doi.org/10.3390/mi13020331 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Di
Wang, Han
Chen, Xiaojun
Liu, Yang
Lu, Dong
Liu, Xinyu
Han, Changjun
Densification, Tailored Microstructure, and Mechanical Properties of Selective Laser Melted Ti–6Al–4V Alloy via Annealing Heat Treatment
title Densification, Tailored Microstructure, and Mechanical Properties of Selective Laser Melted Ti–6Al–4V Alloy via Annealing Heat Treatment
title_full Densification, Tailored Microstructure, and Mechanical Properties of Selective Laser Melted Ti–6Al–4V Alloy via Annealing Heat Treatment
title_fullStr Densification, Tailored Microstructure, and Mechanical Properties of Selective Laser Melted Ti–6Al–4V Alloy via Annealing Heat Treatment
title_full_unstemmed Densification, Tailored Microstructure, and Mechanical Properties of Selective Laser Melted Ti–6Al–4V Alloy via Annealing Heat Treatment
title_short Densification, Tailored Microstructure, and Mechanical Properties of Selective Laser Melted Ti–6Al–4V Alloy via Annealing Heat Treatment
title_sort densification, tailored microstructure, and mechanical properties of selective laser melted ti–6al–4v alloy via annealing heat treatment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8875346/
https://www.ncbi.nlm.nih.gov/pubmed/35208455
http://dx.doi.org/10.3390/mi13020331
work_keys_str_mv AT wangdi densificationtailoredmicrostructureandmechanicalpropertiesofselectivelasermeltedti6al4valloyviaannealingheattreatment
AT wanghan densificationtailoredmicrostructureandmechanicalpropertiesofselectivelasermeltedti6al4valloyviaannealingheattreatment
AT chenxiaojun densificationtailoredmicrostructureandmechanicalpropertiesofselectivelasermeltedti6al4valloyviaannealingheattreatment
AT liuyang densificationtailoredmicrostructureandmechanicalpropertiesofselectivelasermeltedti6al4valloyviaannealingheattreatment
AT ludong densificationtailoredmicrostructureandmechanicalpropertiesofselectivelasermeltedti6al4valloyviaannealingheattreatment
AT liuxinyu densificationtailoredmicrostructureandmechanicalpropertiesofselectivelasermeltedti6al4valloyviaannealingheattreatment
AT hanchangjun densificationtailoredmicrostructureandmechanicalpropertiesofselectivelasermeltedti6al4valloyviaannealingheattreatment