• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2023 Fiscal Year Final Research Report

Strengthening mechanism of reaction layer at Fe/Al interface to design and control the Al/Fe weld without property deterioration

Research Project

  • PDF
Project/Area Number 21H01662
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26050:Material processing and microstructure control-related
Research InstitutionTohoku University

Principal Investigator

Sato Yutaka  東北大学, 工学研究科, 教授 (00292243)

Co-Investigator(Kenkyū-buntansha) 鴇田 駿  東北大学, 工学研究科, 助教 (60807668)
Project Period (FY) 2021-04-01 – 2024-03-31
Keywords異材接合 / Al/Fe接合 / 反応層 / 元素添加 / 機械的性質 / ミクロ組織
Outline of Final Research Achievements

This study aimed to elucidate the strengthening mechanism of dissimilar weld interface of Al to Fe by additions of alloying elements, such as Zn, Ni and Zn+Ni. Microstructure observations and nanoindentation tests of the layer revealed that the addition of Zn and Zn+Ni reduced the hardness of the interfacial layer through formation of Fe-Zn compounds. Single addition of Ni resulted in formation of dense interfacial layer consisting of fine Fe2Al5 grains with low fraction of Fe islands. These microstructural changes achieved by the additional elements might contribute to the strength improvement in the Al/Fe dissimilar weld.

Free Research Field

溶接・接合

Academic Significance and Societal Importance of the Research Achievements

本研究の過程で、Al/Fe異種金属接合体の破壊は界面層におけるき裂の発生によって支配され、その接合強度は界面層におけるき裂発生応力と相関があることが示唆された。したがって、き裂の発生起点を抑制した界面層の設計を達成することができれば、Al/Fe接合に限らず、界面層を介して接合が達成されるAl/Cu、Al/Mg、Fe/Tiなどの異材接合についてもさらなる界面強度向上が期待される。そのため、異材接合の高強度化のための指針を提示した本研究は、学術的および社会的にも有用といえる。

URL: 

Published: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi