Interfacial Microstructure and Properties of Steel/Aluminum Powder Additive

Based on first-principles density functional theory, the Fe/Al interface model of steel/aluminum laser welding was constructed by layer technique. The Fe/Al interface was studied by metal atom X (X=Sn, Sr, Zr, Ce, La).The results show that Sn, Sr and Ce preferentially displace the Al atoms at the Fe...

Full description

Saved in:
Bibliographic Details
Published inCai liao gong cheng = Journal of materials engineering Vol. 45; no. 9; pp. 123 - 128
Main Authors Yuan, Jiang, Zhou, Dian-Wu, Chen, Sheng-Qian, Sun, Jia-Yao, Hou, De-Zheng
Format Journal Article
LanguageChinese
Published Beijing Beijing Institute of Aeronautical Materials 01.09.2017
Journal of Materials Engineering
Subjects
Alloying effects
Aluminum
Aluminum base alloys
Density functional theory
Elongation
Fe/Al interface
Ferrous alloys
First principles
Galvanized steel
Galvanized steels
Galvanizing
Lap welding
Laser beam welding
laser lap welding
Metals
Microstructure
steel/aluminum
Zirconium
Online AccessGet full text

Cover

More Information
Summary:Based on first-principles density functional theory, the Fe/Al interface model of steel/aluminum laser welding was constructed by layer technique. The Fe/Al interface was studied by metal atom X (X=Sn, Sr, Zr, Ce, La).The results show that Sn, Sr and Ce preferentially displace the Al atoms at the Fe/Al interface, while La and Zr preferentially displace the Fe atoms at the Fe/Al interface. Alloying promotes the transfer of Fe/Al interfacial electrons between different orbits, enhances the ionic bond properties of Fe-Al, improves the Fe/Al interface binding capacity, improves the brittle fracture of Fe/Al interface, and the alloying effect of Sn most notable. On the basis of this, the laser lap welding test of Sn and Zr powder was carried out on 1.4mm thick DC51D+ZF galvanized steel and 1.2mm thick 6016 aluminum alloy specimen. The results show that the addition of powder can promote the flowability of the molten bath and change the composition and microstructure of the joint interface. The tensile strength of
ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2016.000500