Effects of rare-earth element addition and heat treatment on the microstructures and mechanical properties of Al-25% Si alloy

被引：3

作者：

Dang, Bo ^{[1
]}

Jian, Zengyun ^{[1
]}

Xu, Junfeng ^{[1
]}

机构：

[1] Xian Technol Univ, Shaanxi Key Lab Photoelect Funct Mat & Devices, Xuefu Middle Rd 2, Xian 710021, Shaanxi, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2017年 / 108卷 / 04期

关键词：

Al-25% Si alloy; Rare earth metals; Heat treatment; Microstructure; Mechanical properties; MELT THERMAL-TREATMENT; PRIMARY SILICON; EUTECTIC SI; TENSILE PROPERTIES; AL-ALLOY; PERFORMANCE; MORPHOLOGY; PARTICLES; PHASE; ER;

D O I：

10.3139/146.111477

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of pouring temperature, the content of a rare earth ( RE) metal modifier, and T6 heat treatment on the microstructure and mechanical properties of Al-25% Si alloy were investigated. The results show that for the unmodified alloy, the morphology of primary Si was transformed from coarse polygons and platelets to fine polyhedral, and the average size decreased with increasing pouring temperature. The primary Si exhibited a small blocky morphology with an average size of 47 mu m at an optimal content of 1.2% RE. The tensile strength and elongation were enhanced by the addition of RE followed by the T6 heat treatment, and the maximum tensile strength and elongation (208.3 MPa and 1.01%) were obtained for the sample modified with 1.2% RE followed by the T6 heat treatment.

引用

页码：269 / 274

页数：6

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