Effects of In-Situ BaB6/Al Composite Inoculant on the Mechanical and Corrosion Behavior of Al-7Si-0.3Mg Alloy

被引：1

作者：

Liang, Yingguang ^{[1
,2
]}

Cui, Chunxiang ^{[1
]}

Geng, Hongtao ^{[1
]}

Liu, Lu ^{[1
]}

Cui, Sen ^{[1
]}

Yang, Shichao ^{[1
]}

机构：

[1] Hebei Univ Technol, Sch Mat Sci & Technol, Key Lab New Type Funct Mat Hebei Prov, Tianjin 300401, Peoples R China

[2] Henan Inst Technol, Sch Mech Engn, Xinxiang 453003, Henan, Peoples R China

来源：

METALS AND MATERIALS INTERNATIONAL | 2023年 / 29卷 / 04期

基金：

中国国家自然科学基金;

关键词：

A356.2; BaB6/Al composites; Refine and modify; Mechanical and corrosion behavior; BaB6/Al interface; Si twins; TENSILE PROPERTIES; GRAIN-REFINEMENT; EUTECTIC SI; MICROSTRUCTURE; MG; SILICON; BORON; PROPERTY; STRENGTH; CAB6;

D O I：

10.1007/s12540-022-01269-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, as an inoculant, in-situ BaB6/Al composites was fabricated and used to refine the alpha-Al dendrites and modify the eutectic Si of A356.2(A1-7Si-0.3Mg) alloy. BaB6/Al ingot and ribbon composites mainly contain two phases, alpha-Al and BaB6. In BaB6/Al ribbons, nano-size BaB6 ceramic particles exist and disperse uniformly which help to better exert the inoculant effect in A356.2 alloy. YS, UTS, EL and HV of B2 alloy are 36.3%, 18.3%, 46.4% and 20.8% higher than the base alloy (B0), respectively. The ductile fracture characteristics are more obvious. Moreover, B2 alloy shows the best corrosion resistance. Al and BaB6 form a clear, stable and well matched interface, so BaB6 particles can act as the heterogeneous nucleation of alpha-Al and refine the A356.2 alloy. Furthermore, the combined of free micro-alloying elements Ba and B in BaB6/Al composites promote the twins formation, which change the eutectic Si to fine fibrous and granular shape.

引用

页码：968 / 982

页数：15

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