Dispersoids in Al-Mg-Si Alloy AA 6086 Modified by Sc and Y

Franz Zupanic; Sandi Zist; Mihaela Albu; Ilse Letofsky-Papst; Jaka Burja; Maja Voncina

doi:10.3390/ma16082949

Dispersoids in Al-Mg-Si Alloy AA 6086 Modified by Sc and Y

Franz Zupanic, Sandi Zist, Mihaela Albu, Ilse Letofsky-Papst, Jaka Burja, Maja Voncina

Institute of Electron Microscopy and Nanoanalysis (5190)

Research output: Contribution to journal › Article › peer-review

Abstract

The aluminium alloy AA 6086 attains the highest room temperature strength among Al-Mg-Si alloys. This work studies the effect of Sc and Y on the formation of dispersoids in this alloy, especially L12-type ones, which can increase its high-temperature strength. A comprehensive investigation was carried out using light microscopy (LM), scanning (SEM), and transmission (TEM)
electron microscopy, energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and dilatometry to obtain the information regarding the mechanisms and kinetics of dispersoid formation, particularly during isothermal treatments. Sc and Y caused the formation of L12 dispersoids during heating to homogenization temperature and homogenization of the alloys, and during isothermal heat treatments of the as-cast alloys (T5 temper). The highest hardness of Sc and (Sc + Y) modified alloys was attained by heat-treating alloys in the as-cast state in the temperature range between 350 ºC and 450 ºC (via T5 temper).

Original language	English
Article number	2949
Number of pages	24
Journal	Materials
Volume	16
Issue number	8
DOIs	https://doi.org/10.3390/ma16082949
Publication status	Published - 2023

Keywords

alloy
aluminium
dilatometry
dispersoids
DSC
hardness
heat treatment
microstructure

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
General Materials Science

Fields of Expertise

Advanced Materials Science

Treatment code (Nähere Zuordnung)

Basic - Fundamental (Grundlagenforschung)

Access to Document

10.3390/ma16082949Licence: CC BY 4.0

Cite this

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title = "Dispersoids in Al-Mg-Si Alloy AA 6086 Modified by Sc and Y",

abstract = "The aluminium alloy AA 6086 attains the highest room temperature strength among Al-Mg-Si alloys. This work studies the effect of Sc and Y on the formation of dispersoids in this alloy, especially L12-type ones, which can increase its high-temperature strength. A comprehensive investigation was carried out using light microscopy (LM), scanning (SEM), and transmission (TEM)electron microscopy, energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and dilatometry to obtain the information regarding the mechanisms and kinetics of dispersoid formation, particularly during isothermal treatments. Sc and Y caused the formation of L12 dispersoids during heating to homogenization temperature and homogenization of the alloys, and during isothermal heat treatments of the as-cast alloys (T5 temper). The highest hardness of Sc and (Sc + Y) modified alloys was attained by heat-treating alloys in the as-cast state in the temperature range between 350 ºC and 450 ºC (via T5 temper).",

keywords = "alloy, aluminium, dilatometry, dispersoids, DSC, hardness, heat treatment, microstructure",

author = "Franz Zupanic and Sandi Zist and Mihaela Albu and Ilse Letofsky-Papst and Jaka Burja and Maja Voncina",

year = "2023",

doi = "10.3390/ma16082949",

language = "English",

volume = "16",

journal = "Materials",

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T1 - Dispersoids in Al-Mg-Si Alloy AA 6086 Modified by Sc and Y

AU - Zupanic, Franz

AU - Zist, Sandi

AU - Albu, Mihaela

AU - Letofsky-Papst, Ilse

AU - Burja, Jaka

AU - Voncina, Maja

PY - 2023

Y1 - 2023

N2 - The aluminium alloy AA 6086 attains the highest room temperature strength among Al-Mg-Si alloys. This work studies the effect of Sc and Y on the formation of dispersoids in this alloy, especially L12-type ones, which can increase its high-temperature strength. A comprehensive investigation was carried out using light microscopy (LM), scanning (SEM), and transmission (TEM)electron microscopy, energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and dilatometry to obtain the information regarding the mechanisms and kinetics of dispersoid formation, particularly during isothermal treatments. Sc and Y caused the formation of L12 dispersoids during heating to homogenization temperature and homogenization of the alloys, and during isothermal heat treatments of the as-cast alloys (T5 temper). The highest hardness of Sc and (Sc + Y) modified alloys was attained by heat-treating alloys in the as-cast state in the temperature range between 350 ºC and 450 ºC (via T5 temper).

AB - The aluminium alloy AA 6086 attains the highest room temperature strength among Al-Mg-Si alloys. This work studies the effect of Sc and Y on the formation of dispersoids in this alloy, especially L12-type ones, which can increase its high-temperature strength. A comprehensive investigation was carried out using light microscopy (LM), scanning (SEM), and transmission (TEM)electron microscopy, energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and dilatometry to obtain the information regarding the mechanisms and kinetics of dispersoid formation, particularly during isothermal treatments. Sc and Y caused the formation of L12 dispersoids during heating to homogenization temperature and homogenization of the alloys, and during isothermal heat treatments of the as-cast alloys (T5 temper). The highest hardness of Sc and (Sc + Y) modified alloys was attained by heat-treating alloys in the as-cast state in the temperature range between 350 ºC and 450 ºC (via T5 temper).

KW - alloy

KW - aluminium

KW - dilatometry

KW - dispersoids

KW - DSC

KW - hardness

KW - heat treatment

KW - microstructure

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U2 - 10.3390/ma16082949

DO - 10.3390/ma16082949

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VL - 16

JO - Materials

JF - Materials

IS - 8

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ER -

Dispersoids in Al-Mg-Si Alloy AA 6086 Modified by Sc and Y

Abstract

Keywords

ASJC Scopus subject areas

Fields of Expertise

Treatment code (Nähere Zuordnung)

Access to Document

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