New eutectic type Al alloys based on the Al-Ca-La(-Zr, Sc) system

被引：11

作者：

Akopyan, T. K. ^{[1
]}

Letyagin, N., V ^{[1
]}

Belov, N. A. ^{[1
]}

Shurkin, P. K. ^{[1
]}

机构：

[1] Natl Univ Sci & Technol MISiS, 4 Leninsky Pr, Moscow 119049, Russia

来源：

MATERIALS TODAY-PROCEEDINGS | 2019年 / 19卷

基金：

俄罗斯科学基金会;

关键词：

Al alloys; Eutectic; Composites; Phase diagram; Microstructure; PHASE-COMPOSITION; CA; NI;

D O I：

10.1016/j.matpr.2019.07.062

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Phase equilibria in the Al-Ca-La system, microstructure and mechanical properties of alloys were investigated. The most promising alloy contents up to 3 wt% Ca and 2 wt% La (Al3Ca2La). The microstructure consists of Al primary crystals and ultra-fine eutectic which consists of binary Al4Ca and Al4La compounds. The Al3Ca2La alloy in as-cast state has ultimate tensile strength of about 125 +/- 10 MPa, yield strength of 70 +/- 10 MPa and ductility of 15.0 +/- 0.2%. The alloying with zirconium and scandium of up to 0.3 wt% provides an increase in strength properties by two times after sample annealing at 350 degrees C. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：2009 / 2012

页数：4

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