Influence of solution treatments on the age-hardening response of Mg–Gd(–Mn–Sc) alloys

The microstructures and age-hardening response of a Mg–5 wt.%Gd alloy and a Mg–5 wt.%Gd–1.1 wt.%Mn–0.8 wt.%Sc alloy have been examined under different solution treatment conditions. Both alloys exhibit little or no age-hardening response during isothermal ageing at temperatures above 200 °C when the...

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Published in:Journal of alloys and compounds 2009-11, Vol.486 (1), p.900-904
Main Authors: Fang, X.Y., Yi, D.Q., Nie, J.F.
Format: Article
Language:English
Subjects:
Age hardening
Aging
Alloys
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Magnesium alloys
Magnesium base alloys
Materials science
Microstructure
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Precipitates
Precipitation
Quaternary alloys
Solution heat treatment
Solution treatment
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description The microstructures and age-hardening response of a Mg–5 wt.%Gd alloy and a Mg–5 wt.%Gd–1.1 wt.%Mn–0.8 wt.%Sc alloy have been examined under different solution treatment conditions. Both alloys exhibit little or no age-hardening response during isothermal ageing at temperatures above 200 °C when the alloys are solution treated at 520 °C for 24 h. Solution treatment at 610 °C for 24 h does not improve the age-hardening response of the binary alloy. However, it leads to a significant increase in hardness during ageing for the quaternary alloy. This improved age-hardening response in the quaternary alloy is ascribed to the dense precipitation of two fine-scale precipitate phases during ageing.
doi_str_mv 10.1016/j.jallcom.2009.07.093
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subjects Age hardening
Aging
Alloys
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Magnesium alloys
Magnesium base alloys
Materials science
Microstructure
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Precipitates
Precipitation
Quaternary alloys
Solution heat treatment
Solution treatment
title Influence of solution treatments on the age-hardening response of Mg–Gd(–Mn–Sc) alloys
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