Journal
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 17, Issue -, Pages 1330-1337Publisher
ELSEVIER
DOI: 10.1016/j.jmrt.2022.01.094
Keywords
Al-Mg 2 Si alloy; Solution temperature; Cu addition; Precipitation
Funding
- National Natural Science Foundation of China [52122409]
- Natural Sci-ence Foundation of Tianjin City [20JCYBJC00950]
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The effect of solution temperature on the aging hardening behavior of Al-15%Mg2Si(-1%Cu) alloys was investigated. It was found that increasing the solution temperature promoted the formation of nano-precipitates, leading to enhanced hardness and ultimate tensile strength of the alloys.
The effect of solution temperature on the aging hardening behavior of Al-15%Mg2Si(-1%Cu) alloys was studied by characterizing the precipitation behaviors of nano-precipitates. After the solution temperature rises from 520 degrees C to 550 degrees C, more solute atoms are available for precipitation, and the formation activation energies of precipitates (B and S) decrease. So the formation of B''/B' in Al-15%Mg2Si alloy and S in Al-15%Mg2Si-1%Cu alloy is accelerated at a solution temperature of 550 degrees C, which enhances the hardness and ultimate tensile strength (UTS) of the two alloys.
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