Characteristics and Estimation of Interfacial Microstructure with Additional Elements in Dissimilar Metal Joints of Aluminum Alloys to Steel

• Ogura Tomo

  Division of Materials and Manufacturing Science, Graduate school of Engineering, Osaka University

• Umeshita Hidetaka

  Division of Materials and Manufacturing Science, Graduate school of Engineering, Osaka University (now Komatsu Ltd.)

• Saito Yuichi

  Division of Materials and Manufacturing Science, Graduate school of Engineering, Osaka University

• Hirose Akio

  Division of Materials and Manufacturing Science, Graduate school of Engineering, Osaka University

Abstract

The effects of alloying elements on the interfacial microstructure of the dissimilar Al/steel joints were discussed using SEM, EPMA, TEM and tensile test. For Si (and Cu)-added 6000 system aluminum alloy, EPMA analysis showed that Si (and Cu) was enriched in the reaction layer, which were formed during diffusion bonding. SAED (Selected area electron diffraction) pattern identified the reaction layer at the interface as Al-Fe-Si system containing Cu. High bondability was achieved by adding both Si and Cu to 6000 system aluminum alloy. High carbon content in steels caused the poor bondability, however, Si and Mn addition to the steel with large amount of carbon was effective to suppress the negative effect of carbon. An incubation time until a reaction layer was formed was recognized at lower bonding temperature and the time depended on additional elements. The reaction rate equation taking into account of an incubation time was newly proposed. This estimated bonding range based on the proposed reaction rate equation shows a good agreement with the obtained experimental results.

Journal

• QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

  QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 27 (2), 174s-178s, 2009

  JAPAN WELDING SOCIETY

Keywords

• Dissimilar metal joint
• Aluminum alloys to Steels
• Solid-state diffusion bonding
• Additional elements
• Interfacial reaction layer

Details

• CRID: 1390001204724737664
• NII Article ID: 10030149139
• NII Book ID: AN1005067X
• DOI: 10.2207/qjjws.27.174s
• ISSN: 24348252
• ISSN: 02884771
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed