TY - JOUR
T1 - Strength Improvement Through Grain Refinement of Intermetallic Compound at Al/Fe Dissimilar Joint Interface by the Addition of Alloying Elements
AU - Furuya, H. S.
AU - Sato, Y. T.
AU - Sato, Y. S.
AU - Kokawa, Hiroyuki
AU - Tatsumi, Y.
N1 - Funding Information:
The authors are grateful to Mr. A. Honda and Dr. K. Kobayashi for technical assistance and to Professor N. Hirata for the preparation of the Al alloy used in this study. They also wish to thank Professor T. Narushima and Professor R. Kainuma for their helpful discussion. This work was partially supported by a Grant-in-Aid for Challenging Exploratory Research and a program named ‘Next Generation Automobiles in Miyagi’ partially funded by the Ministry of Education, Culture, Sports, Science and Technology, Japan.
Publisher Copyright:
© 2017, The Minerals, Metals & Materials Society and ASM International.
PY - 2018/2/1
Y1 - 2018/2/1
N2 - Dissimilar material joining between Al alloys and steel may be effective in decreasing the weight of automobile bodies. In this study, dissimilar lap joining of Al alloys containing certain alloying elements, such as Ni, Cr, Mn, Ti, or Si, to interstitial-free steel was performed by tungsten inert gas arc brazing, and the effect of the alloying element on the joint strength associated with the Al-Fe intermetallic compound layer at the dissimilar interface was examined. The addition of an appropriate amount of an alloying element to the alloy increased the joint strength; the addition of Ni exhibited the most effective improvement. The additions of some elements changed the grain structure of the η-Fe2Al5 layer but not its chemical composition. This is the first study to clarify that smaller grain size of η-Fe2Al5 correlated to greater strength of the Al/Fe dissimilar joint.
AB - Dissimilar material joining between Al alloys and steel may be effective in decreasing the weight of automobile bodies. In this study, dissimilar lap joining of Al alloys containing certain alloying elements, such as Ni, Cr, Mn, Ti, or Si, to interstitial-free steel was performed by tungsten inert gas arc brazing, and the effect of the alloying element on the joint strength associated with the Al-Fe intermetallic compound layer at the dissimilar interface was examined. The addition of an appropriate amount of an alloying element to the alloy increased the joint strength; the addition of Ni exhibited the most effective improvement. The additions of some elements changed the grain structure of the η-Fe2Al5 layer but not its chemical composition. This is the first study to clarify that smaller grain size of η-Fe2Al5 correlated to greater strength of the Al/Fe dissimilar joint.
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U2 - 10.1007/s11661-017-4442-x
DO - 10.1007/s11661-017-4442-x
M3 - Article
AN - SCOPUS:85038399270
VL - 49
SP - 527
EP - 536
JO - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
JF - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
SN - 1073-5623
IS - 2
ER -