Development and properties of high strengthened carbon steels produced by repetitive side extrusion and heat treatment process

Koshiro Aoki, Akira Azushima

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

6 Citations (Scopus)

Abstract

In recent years, ultrafine grained steels have developed by the new thermo-mechanical control processing (TMCP) and the severe plastic deformation (SPD) processes. The minimum ferrite grain size obtained by the new TMCP is less than 1μm. On the other hand, in the SPD processes such as the equal channel angular Extrusion (ECAE), the high pressure torsion process (HPT) and the accumulative roll bonding (ARB), steels with a sub-micron scaled grain size are developed. In order to obtain high-strengthened steel with ductility, carbon steels with various carbon contents were deformed by repetitive side extrusion process and heat treatment, and the properties of materials such as Vickers hardness, tensile strength and microstructure observation were investigated. Vickers hardness and tensile strength increased with increasing number of process. The microstructures of all steels were refined by deformed structure. After heat treatment, the tensile strength became lower and total elongation increased with decreasing hardness. Fatigue property was better than that of the as-received material after side extrusion and heat treatment.

Original languageEnglish
Title of host publicationSupplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006
Pages2884-2891
Number of pages8
EditionPART 3
Publication statusPublished - 2007 Dec 1
Event5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006 - Vancouver, Canada
Duration: 2006 Jul 42006 Jul 8

Publication series

NameMaterials Science Forum
NumberPART 3
Volume539-543
ISSN (Print)0255-5476

Conference

Conference5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006
CountryCanada
CityVancouver
Period06/7/406/7/8

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Keywords

  • ECAE
  • Shear deformation
  • Ultrafine grain

ASJC Scopus subject areas

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

Cite this

Aoki, K., & Azushima, A. (2007). Development and properties of high strengthened carbon steels produced by repetitive side extrusion and heat treatment process. In Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006 (PART 3 ed., pp. 2884-2891). (Materials Science Forum; Vol. 539-543, No. PART 3).