Electrical resistometry study of an AlMgSi alloy under artificial aging

JOURNAL OF ALLOYS AND COMPOUNDS

卷:542

Article

Stipcich, M.¹  Cuniberti, A.¹  Noseda Grau, V.¹ 

[1] UNCentro, Fac Ciencias Exactas, Inst Fis Mat Tandil, IFIMAT, RA-7000 Tandil, Argentina

关键词: AlMgSi alloy;    beta '' precipitation;    Electrical resistometry;    Vickers microhardness;    Differential scanning calorimetry;   

DOI  :  10.1016/j.jallcom.2012.07.031

来源: Elsevier

【 摘 要 】

The artificial aging of an AlMgSi commercial alloy was studied by electrical resistometry measurements. A laboratory-made experimental arrangement was designed in order to avoid natural aging prior to artificial aging. The electrical resistometry evolution was compared to Vickers microhardness determinations, and correlated with the precipitation sequence. The temporal evolution of beta '' relative volume fraction is described by a normalized resistance evolution by means of a Johnson-Mehl-Avrami type equation. The activation energy is in good agreement with that obtained from differential scanning calorimetric experiments. (C) 2012 Elsevier B.V. All rights reserved.

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