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Intrinsic and Extrinsic Effects of Microstructure on Properties in Cast Al Alloys

The metallurgy of cast aluminum alloys has always been considered to be different from that of wrought alloys. Metallurgists have been taught that pores are intrinsic in cast aluminum alloys and that mechanical properties in cast aluminum alloys are controlled by dendrite arm spacing, the presence o...

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Autor principal: Tiryakioğlu, Murat
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254244/
https://www.ncbi.nlm.nih.gov/pubmed/32344917
http://dx.doi.org/10.3390/ma13092019
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author Tiryakioğlu, Murat
author_facet Tiryakioğlu, Murat
author_sort Tiryakioğlu, Murat
collection PubMed
description The metallurgy of cast aluminum alloys has always been considered to be different from that of wrought alloys. Metallurgists have been taught that pores are intrinsic in cast aluminum alloys and that mechanical properties in cast aluminum alloys are controlled by dendrite arm spacing, the presence of Fe-bearing particles, and the size of Si particles in Al–Si alloys, which fracture and debond during deformation, leading to premature failure. Whether these effects are intrinsic or extrinsic, i.e., mere correlations due to the structural quality of castings, is discussed in detail. Ideal properties are discussed, based on findings presented mostly in physics literature. Pores and hot tears in aluminum castings are extrinsic. Moreover, the effect of dendrite arm spacing on elongation, precipitation, and subsequent fracture of β–Al(5)FeSi platelets, and finally Si particle fracture and debonding are all extrinsic. A fundamental change in how we approach the metallurgy of cast aluminum alloys is necessary.
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spelling pubmed-72542442020-06-10 Intrinsic and Extrinsic Effects of Microstructure on Properties in Cast Al Alloys Tiryakioğlu, Murat Materials (Basel) Perspective The metallurgy of cast aluminum alloys has always been considered to be different from that of wrought alloys. Metallurgists have been taught that pores are intrinsic in cast aluminum alloys and that mechanical properties in cast aluminum alloys are controlled by dendrite arm spacing, the presence of Fe-bearing particles, and the size of Si particles in Al–Si alloys, which fracture and debond during deformation, leading to premature failure. Whether these effects are intrinsic or extrinsic, i.e., mere correlations due to the structural quality of castings, is discussed in detail. Ideal properties are discussed, based on findings presented mostly in physics literature. Pores and hot tears in aluminum castings are extrinsic. Moreover, the effect of dendrite arm spacing on elongation, precipitation, and subsequent fracture of β–Al(5)FeSi platelets, and finally Si particle fracture and debonding are all extrinsic. A fundamental change in how we approach the metallurgy of cast aluminum alloys is necessary. MDPI 2020-04-25 /pmc/articles/PMC7254244/ /pubmed/32344917 http://dx.doi.org/10.3390/ma13092019 Text en © 2020 by the author. 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 Perspective
Tiryakioğlu, Murat
Intrinsic and Extrinsic Effects of Microstructure on Properties in Cast Al Alloys
title Intrinsic and Extrinsic Effects of Microstructure on Properties in Cast Al Alloys
title_full Intrinsic and Extrinsic Effects of Microstructure on Properties in Cast Al Alloys
title_fullStr Intrinsic and Extrinsic Effects of Microstructure on Properties in Cast Al Alloys
title_full_unstemmed Intrinsic and Extrinsic Effects of Microstructure on Properties in Cast Al Alloys
title_short Intrinsic and Extrinsic Effects of Microstructure on Properties in Cast Al Alloys
title_sort intrinsic and extrinsic effects of microstructure on properties in cast al alloys
topic Perspective
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254244/
https://www.ncbi.nlm.nih.gov/pubmed/32344917
http://dx.doi.org/10.3390/ma13092019
work_keys_str_mv AT tiryakioglumurat intrinsicandextrinsiceffectsofmicrostructureonpropertiesincastalalloys