Microstructure and properties of additively manufactured Al–Ce–Mg alloys

Abstract Additive manufacturing of aluminum alloys is largely dominated by a near-eutectic Al-Si compositions, which are highly weldable, but have mechanical properties that are not competitive with conventional wrought Al alloys. In addition, there is a need for new Al alloys with improved high tem...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	K. Sisco, A. Plotkowski, Y. Yang, D. Leonard, B. Stump, P. Nandwana, R. R. Dehoff, S. S. Babu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/85fdba6ce257488d90713efecd98ed37
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:85fdba6ce257488d90713efecd98ed37
record_format	dspace
spelling	oai:doaj.org-article:85fdba6ce257488d90713efecd98ed372021-12-02T13:24:26ZMicrostructure and properties of additively manufactured Al–Ce–Mg alloys10.1038/s41598-021-86370-42045-2322https://doaj.org/article/85fdba6ce257488d90713efecd98ed372021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86370-4https://doaj.org/toc/2045-2322Abstract Additive manufacturing of aluminum alloys is largely dominated by a near-eutectic Al-Si compositions, which are highly weldable, but have mechanical properties that are not competitive with conventional wrought Al alloys. In addition, there is a need for new Al alloys with improved high temperature properties and thermal stability for applications in the automotive and aerospace fields. In this work, we considered laser powder bed fusion additive manufacturing of two alloys in the Al–Ce–Mg system, designed as near-eutectic (Al–11Ce–7Mg) and hyper-eutectic (Al–15Ce–9Mg) compositions with respect to the binary L → Al + Al11Ce eutectic reaction. The addition of magnesium is used to promote solid solution strengthening. A custom laser scan pattern was used to reduce the formation of keyhole porosity, which was caused by excessive vaporization due to the high vapor pressure of magnesium. The microstructure and tensile mechanical properties of the alloys were characterized in the as-fabricated condition and following hot isostatic pressing. The two alloys exhibit significant variations in solidification structure morphology. These variations in non-equilibrium solidification structure were rationalized using a combination of thermodynamic and thermal modeling. Both alloys showed higher yield strength than AM Al-10Si-Mg for temperatures up to 350 °C and better strength retention at elevated temperatures than additively manufactured Scalmaloy.K. SiscoA. PlotkowskiY. YangD. LeonardB. StumpP. NandwanaR. R. DehoffS. S. BabuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q K. Sisco A. Plotkowski Y. Yang D. Leonard B. Stump P. Nandwana R. R. Dehoff S. S. Babu Microstructure and properties of additively manufactured Al–Ce–Mg alloys
description	Abstract Additive manufacturing of aluminum alloys is largely dominated by a near-eutectic Al-Si compositions, which are highly weldable, but have mechanical properties that are not competitive with conventional wrought Al alloys. In addition, there is a need for new Al alloys with improved high temperature properties and thermal stability for applications in the automotive and aerospace fields. In this work, we considered laser powder bed fusion additive manufacturing of two alloys in the Al–Ce–Mg system, designed as near-eutectic (Al–11Ce–7Mg) and hyper-eutectic (Al–15Ce–9Mg) compositions with respect to the binary L → Al + Al11Ce eutectic reaction. The addition of magnesium is used to promote solid solution strengthening. A custom laser scan pattern was used to reduce the formation of keyhole porosity, which was caused by excessive vaporization due to the high vapor pressure of magnesium. The microstructure and tensile mechanical properties of the alloys were characterized in the as-fabricated condition and following hot isostatic pressing. The two alloys exhibit significant variations in solidification structure morphology. These variations in non-equilibrium solidification structure were rationalized using a combination of thermodynamic and thermal modeling. Both alloys showed higher yield strength than AM Al-10Si-Mg for temperatures up to 350 °C and better strength retention at elevated temperatures than additively manufactured Scalmaloy.
format	article
author	K. Sisco A. Plotkowski Y. Yang D. Leonard B. Stump P. Nandwana R. R. Dehoff S. S. Babu
author_facet	K. Sisco A. Plotkowski Y. Yang D. Leonard B. Stump P. Nandwana R. R. Dehoff S. S. Babu
author_sort	K. Sisco
title	Microstructure and properties of additively manufactured Al–Ce–Mg alloys
title_short	Microstructure and properties of additively manufactured Al–Ce–Mg alloys
title_full	Microstructure and properties of additively manufactured Al–Ce–Mg alloys
title_fullStr	Microstructure and properties of additively manufactured Al–Ce–Mg alloys
title_full_unstemmed	Microstructure and properties of additively manufactured Al–Ce–Mg alloys
title_sort	microstructure and properties of additively manufactured al–ce–mg alloys
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/85fdba6ce257488d90713efecd98ed37
work_keys_str_mv	AT ksisco microstructureandpropertiesofadditivelymanufacturedalcemgalloys AT aplotkowski microstructureandpropertiesofadditivelymanufacturedalcemgalloys AT yyang microstructureandpropertiesofadditivelymanufacturedalcemgalloys AT dleonard microstructureandpropertiesofadditivelymanufacturedalcemgalloys AT bstump microstructureandpropertiesofadditivelymanufacturedalcemgalloys AT pnandwana microstructureandpropertiesofadditivelymanufacturedalcemgalloys AT rrdehoff microstructureandpropertiesofadditivelymanufacturedalcemgalloys AT ssbabu microstructureandpropertiesofadditivelymanufacturedalcemgalloys
_version_	1718393105722376192

Microstructure and properties of additively manufactured Al–Ce–Mg alloys

Ejemplares similares