Effect of Heat Treatment on Commercial AlSi12Cu1(Fe) and AlSi12(b) Aluminum Alloy Die Castings

被引：6

作者：

Battaglia, E. ^{[1
]}

Bonollo, F. ^{[1
]}

Ferro, P. ^{[1
]}

Fabrizi, A. ^{[1
]}

机构：

[1] Univ Padua, Dept Management & Engn, Stradella S Nicola 3, I-36100 Vicenza, Italy

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2018年 / 49A卷 / 05期

关键词：

MG-SI-MN; PRECIPITATION BEHAVIOR; MECHANICAL-PROPERTIES; MICROSTRUCTURE; FE; HOMOGENIZATION; DISPERSOIDS; PARTICLES; EVOLUTION;

D O I：

10.1007/s11661-018-4544-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-pressure die castings (HPDCs) cannot normally be heat-treated at a high temperature because of the presence of inner air/gas- or shrinkage-porosity that may lead to the formation of undesired surface blisters. In this paper, an unconventional heat treatment is proposed. Two secondary Al-Si alloys, AlSi12(b) and AlSi12Cu1(Fe), were stabilization heat-treated at 624 K (350 A degrees C) with soaking times ranging from 1 to 8 hours. Enhancement of both static and dynamic mechanical properties was found to be related to the fragmentation of interconnected eutectic Si particles and the smoothing of coarser crystals. Increased ductility after heat treatment was correlated with a decrease in hardness and Si particle roundness. The formation of Si precipitates within the alpha-Al matrix was also observed.

引用

页码：1631 / 1640

页数：10

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