Al-7%Si-Mg鋳造合金の二段時効

URI http://repository.tsuyama-ct.ac.jp/metadata/459
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Title
Al-7%Si-Mg鋳造合金の二段時効
Title Alternative
Two-step aging of Al-7%Si-Mg casting alloy
Author
著者 藤木 俊介
著者(別表記) Fujiki Shunsuke
著者 佃 誠
著者(別表記) Tsukuda Makoto
Abstract

The two-step aging behavior of Al-7%Si-0.3 or 0.75%Mg casting alloys was investigated by means of the mechanical properties, electrical resistivity and transmission electron microscopy. The alloys were solution-treated at 535℃, quenched, preaged at -55 to 125℃ for 23hr and finally aged at 140 or 180℃ for 5hr. Preaging at -55℃ has no effect on the properties obtained after the final aging. The hardness, tensile and yield strength of the alloys preaged at 25℃ is lowest in all the alloys preaged at -55 to 125℃. If preaged at 125℃, the alloy has mechanical properties identical to those of the alloy without preaging. The positive effect of two-step aging is never found in these casting alloys. These facts are discussed on the bases of change in supersaturation caused by cluster formed during preaging and impossibility of clusters to transform into G.P. zone during final aging.

Subject
560 Metal and mining engineering
Publish Date
1983-10-25
Publication Title
津山工業高等専門学校紀要
Publication Title Alternative
Bulletin of Tsuyama National College of Technology
Volume
21
Start Page
33
End Page
39
ISSN
0287-7066
NCID
AN00149351
Publisher
津山工業高等専門学校
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Contents Type
Departmental Bulletin Paper
language
Japanese
File Version
publisher