Effect of Silicon Content on Solidification Parameters and Microhardness of Al-Si Alloys

被引：0

作者：

Ibanez, Edgar R. ^{[1
,2
]}

Rodriguez, Carlos D. ^{[1
]}

Alonso, Paula R. ^{[3
]}

Ares, Alicia E. ^{[1
,2
]}

机构：

[1] Univ Nacl Misiones UNaM, Programa Mat Fis Quim, Fac Ciencias Exactas Quim & Nat FCEQyN, Felix de Azara 1552 N3300LQD, Posadas Misiones, Argentina

[2] Univ Nacl Misiones UNaM, Consejo Nacl Invest Cient & Tecn CONICET, Inst Mat Misiones IMAM, Felix de Azara 1552 3300, Posadas Misiones, Argentina

[3] Inst Sabato, Comis Nacl Energia Atom CNEA, Dept Transformac & Propiedades, Div Aleac Especiales,Gerencia Mat,Gerencia Area E, Buenos Aires, San Martin, Argentina

来源：

LIGHT METALS 2024 | 2024年

关键词：

Solidification; Microhardness; Columnar grains; Dendrites; Cooling rate; ZN-AL;

D O I：

10.1007/978-3-031-50308-5_52

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In the present work, aluminum-silicon (Al-Si) hypoeutectic alloys were studied in order to investigate the effect of solidification parameters due to the addition of Si in the range of 6 wt. % to 9 wt. % on the structure characteristics and the microhardness. The study was made by directional solidification method in a Brigdman-type furnace. Different types of grains (columnar, equiaxed, and with columnar to equiaxed transition, CET) were visually observed. Such CET depended on the critical thermal gradient G(tc). The analyses carried out indicate that the secondary dendritic spacing (lambda(2)) and the grain size increase significantly with the decrease in the cooling rate (V-e). Furthermore, it was observed that the resulting microhardness increases as the solidification parameters (specifically V-e) increase, this is due to a refinement of the macro and microstructural parameters. Also, it was observed that the microhardness increased with the increase of the Si content.

引用

页码：399 / 408

页数：10

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