Formation of Intermetallic Compounds in Friction Bonding of Al Alloys to Steel

Author:

Yamamoto Naotsugu1,Takahashi Makoto1,Aritoshi Masatoshi2,Ikeuchi Kenji1

Affiliation:

1. Osaka University

2. Hyogo Prefectural Institute of Industrial Research

Abstract

The microstructure of the friction-bonded interface of Al alloys to low C steel has been investigated by TEM observations to reveal the controlling factor of the formation and growth of the IMC (Intermetallic Compound) layer, which caused the premature fracture at the interface even when its thickness was less than 1 μm, as reported in a previous paper. The thickness of the IMC layer observed at the interfaces of Al-Mg alloy/steel and pure-aluminum/steel joints increased almost in proportion to the friction time, but did not obey the parabolic law a characteristic kinetics of the diffusion-controlled process. Analyses of SAD patterns from the IMC layer indicate that it consisted of Fe2Al5, Fe4Al13, (Fe, Mn)Al6 and FeAl2, depending on the alloying elements. These IMCs were granular and distributed almost randomly within the IMC layer, suggesting that mechanical mixing of the steel with the Al alloy occurred at the interface. In the low C steel adjacent to the IMC layer, a zone of much finer grains than those of the base metal was observed. Its width increased with friction time and pressure, and with the growth of the IMC layer, as well. These results suggest that the superficial region of the steel underwent a heavy plastic deformation during the friction process and it had a close relation with the growth of the IMC layer.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference16 articles.

1. S. Elliott and E.R. Wallach: Joining aluminium to steel Part 1-Diffusion bonding, Metal Construction, (1981), pp.167-171.

2. S. Elliott and E.R. Wallach: Joining aluminium to steel Part 2-Friction bonding, Metal Construction, (1981), pp.221-225.

3. R.F. Tylecote: The Solid Phase Welding of Metals, Edward Arnold Ltd., London, (1968), p.154.

4. S. Fukumoto, T. Ono, H. Tsubakino, M. Aritoshi, T. Tomita and K. Okita�Formation Process of Reaction Layer between Aluminum Alloys and Stainless Steel by Friction Welding�Journal of Light Metal & construction�40(2002), pp.22-28. (in Japanese).

5. M. Yilmaz and M. Acet: Interface properties of aluminum/steel friction-welded components, Materials Characterization, 49(2003), pp.421-429.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3