Ab initio prediction of strong interfacial bonding in the Fe|Al bimetallic composite system

被引：12

作者：

Czelej, Kamil ^{[1
]}

Kurzydlowski, Krzysztof J. ^{[2
]}

机构：

[1] Warsaw Univ Technol, Fac Mat Sci & Engn, Mat Design Div, Woloska 141, PL-02507 Warsaw, Poland

[2] Bialystok Tech Univ, Fac Mech Engn, Wiejska 45C, PL-15351 Bialystok, Poland

来源：

SCRIPTA MATERIALIA | 2020年 / 177卷

关键词：

Interfacial bonds; Cohesive energy; Fe vertical bar Al; DFT; Composite; MECHANISMS; ALUMINUM;

D O I：

10.1016/j.scriptamat.2019.10.030

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Atomic-scale calculations were used to investigate the formation of interfacial bonds in the Fe vertical bar Al bimetallic composite system. The results indicate that chemical bonds at pristine Fe vertical bar Al interface display more covalent character than constituent materials resulting in enhanced interface strength. Such an interface exhibits large cohesive energy exceeding significantly the value of bulk aluminum. The effect of two technologically relevant solute elements, i.e. carbon and magnesium on the interface strength was analyzed. Our robust yet simple computational model can be used to predict the most efficient combination of steels and aluminum alloys for cold pressure welding, leading to strong interfacial bonding. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：162 / 165

页数：4

共 25 条

[1] Effects of processing parameters on corrosion properties of dissimilar friction stir welds of aluminium and copper [J].