Investigation of the Influence of Alloying Elements Ni, Cr, Co and Mo on the Crystallization Process, Phase Composition and Corrosion Resistance of AlSi25Cu4Cr and AlSi25Cu5Cr Alloys

被引：0

作者：

Dochev, Boyan ^{[1
]}

Dimova, Desislava ^{[1
]}

Trojan, Karel ^{[2
]}

Capek, Jiri ^{[2
]}

Kamarska, Kalina ^{[1
]}

Chuchulska, Bozhana ^{[3
]}

机构：

[1] Tech Univ Sofia, Fac Mech Engn, Dept Mech Engn & Technol, Branch Plovdiv, Plovdiv 4000, Bulgaria

[2] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Trojanova 13, Prague 12000, Czech Republic

[3] Med Univ Plovdiv, Fac Dent Med, Dept Prosthet Dent Med, Plovdiv 4000, Bulgaria

来源：

MATERIALS | 2025年 / 18卷 / 04期

关键词：

hypereutectic aluminum-silicon alloys; thermal analysis; phase composition; corrosion resistance; AL-SI ALLOYS; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; MICROSTRUCTURE; ALUMINUM; SILICON; IRON; SR; ADDITIONS;

D O I：

10.3390/ma18040907

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

To increase the mechanical and improve the operational properties of the AlSi25Cu4Cr and AlSi25Cu5Cr alloys, combinations of the alloying elements Ni, Co and Mo were used. The AlSi25Cu4Cr alloy was additionally alloyed with both Ni and Mo and Ni, Co and Mo, and the AlSi25Cu5Cr alloy was alloyed with Co and Mo in different concentrations. The dental alloys "wiron light" and "wironit" were used to introduce the elements Ni, Co, Mo, as well as additional amounts of Cr into the composition of the base compositions. The thermal analysis recorded a decrease in the liquidus and solidus temperatures of the base alloys, as well as a narrowing of their crystallization temperature range as a result of the added alloying elements. The influence of the used chemical elements on the phase composition of the alloys was established by X-ray diffraction. The elements Cr and Mo do not form secondary strengthening phases but dissolve in the alpha-solid solution. The results of the corrosion tests conducted in 1 M HCl solution and 1 M H2SO4 solution for 336 h and 504 h show that the elements Ni, Co and Mo improve the corrosion resistance of the alloys.

引用

页数：16

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