Nanoindentation measurement of interfacial reaction layers in 6000 series aluminum alloys and steel dissimilar metal joints with alloying elements

• Ogura Tomo

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

• Ueda Keisuke

  Graduate Student, Graduate School of Engineering, Osaka University

• Saito Yuichi

  Graduate Student, Graduate School of Engineering, Osaka University

• Hirose Akio

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

Bibliographic Information

Other Title

• 合金元素を含んだ６０００系アルミニウム合金／鋼異種金属接合における界面反応層のナノインデンテーション測定

Abstract

Nanoindentation measurements were successfully applied to the interfacial reaction layers in dissimilar metal joints of 6000 series aluminum alloys containing alloying elements to steel in order to characterize their mechanical properties. The nanoindentation hardness of the reaction layer formed at the aluminum side was lower than that formed at the low carbon steel (SPCE) side of the investigated joints. At the aluminum side, the nanoindentation hardness changed by the addition of alloying elements. The hardness of the resulting Al₁₂Fe₃Si intermetallic compound (IMC) (and the same IMC containing Cu) was lower than that of Al₃Fe. In comparison with the hardness values obtained from bulk Al–Fe binary series IMCs, it is considered that hardness changes of interfacial reaction layers are derived from the crystal structural changes produced by the alloying elements. The result of micro-testing of Al–Fe series IMCs indicates that the modification of the interfacial reaction layer by alloying elements contributes to higher ductility and the improvement of joint strength through crystal structural change.

Journal

• Journal of Japan Institute of Light Metals

  Journal of Japan Institute of Light Metals 61 (6), 250-254, 2011

  The Japan Institute of Light Metals

Keywords

• dissimilar metal joints of aluminum alloys and steels
• interfacial reaction
• nanoindentation
• diffusion bonding
• micro-tensile test

Details

• CRID: 1390001206340561408
• NII Article ID: 130004482053
• DOI: 10.2464/jilm.61.250
• ISSN: 18808018
• ISSN: 04515994
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed