Results
Title

Effect of Cooling Rate after Solution Heat Treatment on Aging Properties of Al--Zn-- Mg Alloy.

Authors

Shunsuke Araki; Tatsuya Aono; Tetsuya Ando; Mami Mihara-Narita; Hideo Yoshida; Ken-ichi Ikeda; Yoshinori Tayu

Abstract

This paper investigated the effect of cooling rate after solution heat treatment and pre-aging at 303K after cooling on aging behavior of Al-- 6 mass%Zn--0.75 mass%Mg alloy to elucidate the aging behaviors and strengthening mechanism throughout aging heat treatment in the case of low cooling rate, such as furnace cooling, followed by solution heat treatment. Regardless the absence of pre-aging, the maximum hardness obtained in the materials with furnace cooling after solution treatment was almost the same as that of water-cooled and pre-aged materials during the same aging time. The result of microstructure observations using transmission electron microscope show that fine precipitates consisting of η phase have been formed in all peak-aged materials.

Subjects

PRECIPITATION (Chemistry); TRANSMISSION electron microscopes; HEAT treatment; FURNACES; ALLOYS

Publication

Materials Transactions, 2024, Vol 65, Issue 12, p1612

ISSN

1345-9678

Publication type

Academic Journal

DOI

10.2320/matertrans.MT-L2024018