Effect of laser surface remelting on the microstructure and properties of Al-Al(2)Cu-Si ternary eutectic alloy

Bimodal ultrafine eutectic composites (BUECs) exhibit a good combination of strength and plasticity owing to a dual-hierarchy in eutectic length-scales in the microstructure. The present study investigates the variation of phase, morphology, feature length-scales and modality of microstructures obta...

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Autores principales: Ramakrishnan, Bhupendera Prashanth, Lei, Qian, Misra, Amit, Mazumder, Jyoti
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5647371/
https://www.ncbi.nlm.nih.gov/pubmed/29044169
http://dx.doi.org/10.1038/s41598-017-13953-5
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author Ramakrishnan, Bhupendera Prashanth
Lei, Qian
Misra, Amit
Mazumder, Jyoti
author_facet Ramakrishnan, Bhupendera Prashanth
Lei, Qian
Misra, Amit
Mazumder, Jyoti
author_sort Ramakrishnan, Bhupendera Prashanth
collection PubMed
description Bimodal ultrafine eutectic composites (BUECs) exhibit a good combination of strength and plasticity owing to a dual-hierarchy in eutectic length-scales in the microstructure. The present study investigates the variation of phase, morphology, feature length-scales and modality of microstructures obtained in a Al(81)Cu(13)Si(6) (at. %) ternary alloy after laser surface remelting. A novel approach of varying component bimodal eutectic volume fractions by controlling the cooling rate of the laser solidification process has been presented. The volume fraction of the fine eutectic matrix has a profound effect on the flow strength. Laser remelted microstructures with volume fractions of the fine eutectic varying from 25 to 40% exhibiting compressive flow strengths ranging from 500 to 900 MPa have been obtained. The volume fraction of the fine eutectic decreased with cooling rate and completely ceased to exist at cooling rates greater than [Formula: see text] .
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spelling pubmed-56473712017-10-26 Effect of laser surface remelting on the microstructure and properties of Al-Al(2)Cu-Si ternary eutectic alloy Ramakrishnan, Bhupendera Prashanth Lei, Qian Misra, Amit Mazumder, Jyoti Sci Rep Article Bimodal ultrafine eutectic composites (BUECs) exhibit a good combination of strength and plasticity owing to a dual-hierarchy in eutectic length-scales in the microstructure. The present study investigates the variation of phase, morphology, feature length-scales and modality of microstructures obtained in a Al(81)Cu(13)Si(6) (at. %) ternary alloy after laser surface remelting. A novel approach of varying component bimodal eutectic volume fractions by controlling the cooling rate of the laser solidification process has been presented. The volume fraction of the fine eutectic matrix has a profound effect on the flow strength. Laser remelted microstructures with volume fractions of the fine eutectic varying from 25 to 40% exhibiting compressive flow strengths ranging from 500 to 900 MPa have been obtained. The volume fraction of the fine eutectic decreased with cooling rate and completely ceased to exist at cooling rates greater than [Formula: see text] . Nature Publishing Group UK 2017-10-18 /pmc/articles/PMC5647371/ /pubmed/29044169 http://dx.doi.org/10.1038/s41598-017-13953-5 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Ramakrishnan, Bhupendera Prashanth
Lei, Qian
Misra, Amit
Mazumder, Jyoti
Effect of laser surface remelting on the microstructure and properties of Al-Al(2)Cu-Si ternary eutectic alloy
title Effect of laser surface remelting on the microstructure and properties of Al-Al(2)Cu-Si ternary eutectic alloy
title_full Effect of laser surface remelting on the microstructure and properties of Al-Al(2)Cu-Si ternary eutectic alloy
title_fullStr Effect of laser surface remelting on the microstructure and properties of Al-Al(2)Cu-Si ternary eutectic alloy
title_full_unstemmed Effect of laser surface remelting on the microstructure and properties of Al-Al(2)Cu-Si ternary eutectic alloy
title_short Effect of laser surface remelting on the microstructure and properties of Al-Al(2)Cu-Si ternary eutectic alloy
title_sort effect of laser surface remelting on the microstructure and properties of al-al(2)cu-si ternary eutectic alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5647371/
https://www.ncbi.nlm.nih.gov/pubmed/29044169
http://dx.doi.org/10.1038/s41598-017-13953-5
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