Microstructural evolution during friction stir welding of ultrafine grained Al alloys

Y. S. Sato, M. Urata, Y. Kurihara, S. H.C. Park, H. Kokawa, K. Ikeda, N. Tsuji

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Recently, several metallic materials with ultrafine-grained structures and characterized by high strength and toughness have been developed. When these ultrafine-grained materials are practically used, welding and joining processes are required. However, conventional fusion welding processes result in deterioration of the good mechanical properties of these ultrafine-grained materials due to the drastic grain growth of the ultrafine grains. On the other hand, friction stir welding (FSW) is a solid-state joining process having lower heat-input than fusion welding processes, enabling formation of a fine grain structure in the stir zone. Thus, this process would effectively alleviate deterioration of mechanical properties of the ultrafine-grained materials. The authors applied FSW to ultrafine-grained Al alloys and then examined the microstructural features associated with hardness in the friction stir welds. The present paper reviews microstructural evolution of ultrafine-grained Al alloys, produced by equal channel angular pressing (ECAP) and accumulative roll-bonding (ARB), during FSW.

Original languageEnglish
Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
PublisherTrans Tech Publications Ltd
Pages169-174
Number of pages6
ISBN (Print)0878499857, 9780878499854
DOIs
Publication statusPublished - 2006 Jan 1
Event3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, Japan
Duration: 2005 Sep 222005 Sep 26

Publication series

NameMaterials Science Forum
Volume503-504
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
CountryJapan
CityFukuoka
Period05/9/2205/9/26

Keywords

  • Accumulative roll-bonding
  • Equal channel angular pressing
  • Friction stir welding
  • Hardness
  • Microstructure

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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