Dispersoids in Al-Mg-Si Alloy AA 6086 Modified by Sc and Y-Reference-Cited by-同舟云学术

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

Published:2023-04-07 Issue:8 Volume:16 Page:2949
ISSN:1996-1944
Container-title:Materials
language:en
Short-container-title:Materials

Author:

Zupanič Franc¹^ORCID,Žist Sandi¹²,Albu Mihaela³^ORCID,Letofsky-Papst Ilse⁴^ORCID,Burja Jaka⁵^ORCID,Vončina Maja⁶,Bončina Tonica¹

Affiliation:

1. Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia

2. Impol 2000 d.d., Partizanska ulica 38, SI-2310 Slovenska Bistrica, Slovenia

3. Graz Centre for Electron Microscopy, Steyrergasse 17, A-8010 Graz, Austria

4. Institute of Electron Microscopy and Nanoanalysis and Centre for Electron Microscopy, Graz University of Technology, NAWI Graz, Steyrergasse 17, A-8010 Graz, Austria

5. Institute of Metals & Technology, Lepi pot 11, SI-1000 Ljubljana, Slovenia

6. Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva cesta 12, SI-1000 Ljubljana, Slovenia

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 °C and 450 °C (via T5 temper).

Funder

Slovenian Research Agency

European Union’s Horizon 2020 Research and Innovation Program

Publisher

MDPI AG

Subject

General Materials Science

Link

https://www.mdpi.com/1996-1944/16/8/2949/pdf

Reference67 articles.

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