Tensile and creep properties of Al-7Si-0.3Mg alloy with Zr and Er addition

被引：16

作者：

Rashno, S. ^{[1
]}

Reihanian, M. ^{[1
]}

Ranjbar, Khalil ^{[1
]}

机构：

[1] Shahid Chamran Univ Ahvaz, Dept Mat Sci & Engn, Fac Engn, Ahwaz, Iran

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2020年 / 36卷 / 14期

关键词：

A356; alloy; microstructure; tensile behaviour; impression creep; zirconium; erbium; intermetallic; constitutive equationaAN; ALUMINUM-SILICON ALLOYS; AL-SI ALLOYS; IMPRESSION CREEP; MECHANICAL-PROPERTIES; EUTECTIC SI; PRECIPITATION EVOLUTION; TI ALLOYS; MICROSTRUCTURE; MG; BEHAVIOR;

D O I：

10.1080/02670836.2020.1809144

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The combined and singular effects of Zr and Er addition on the microstructure, tensile and impression creep behaviour of the cast A356 alloy were investigated. The Zr and Er refined the alpha-Al dendrites and secondary dendrite arm spacing (SDAS) and modified the eutectic morphology. The simultaneous addition of Zr and Er exhibited the smallest alpha-Al dendrites and SDAS with a fibrous eutectic morphology, resulting in the highest yield (similar to 118 MPa) and tensile (similar to 190 MPa) strength, and the largest creep resistance. The stress exponent, and the activation energy, were within the range of 6.28-7.22 and between 121.6 and 148.2 kJ mol(-1), respectively. The lattice self-diffusion climb-controlled creep was the dominant creep mechanism. The constitutive creep equation was developed for each alloy.

引用

页码：1603 / 1613

页数：11

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