Forming of housing by impact extrusion press using ultrafine-grained semi-solid light metal

Keiko Natori, Tomoaki Yashima, Yoshihiko Arao, Tatsuya Tanaka

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

1 Citation (Scopus)

Abstract

The forming of thin-walled aluminium housing by impact backward extrusion process was conducted, and the influence of metal microstructure on its formability was investigated. Aluminium alloys of A3003, AC4CH-F and semi-solid state of AC4CH were used as test materials. Additionally, ultrafine-grained metal were fabricated by Equal-Channel Angular Pressing method using a die having channel, φ=90°, Ψ=15 °, from semi-solid AC4CH alloy. And then, cylindrical housings with 9.4mm in diameter and 0.5mm in thickness were formed from as-cast materials and ECAPed samples by impact backward extrusion at room temperature. As a result, press load required for extrusion was decreased using a material processed with increasing the number of ECAP. Vickers hardness of the products was greater than that of the materials before the forming; in the case of using ECAPed materials, the increment was relatively small. This implies that impact extrusion process is a kind of Severe Plastic Deformation that improves mechanical properties of metal materials. Ultrafine-grained semi-solid AC4CH alloy have more possibility to make the housings with further thin thickness than non-ECAP materials.

Original languageEnglish
Title of host publicationAdvances in Applied Mechanics Research, Conference Proceedings - 7th Australasian Congress on Applied Mechanics, ACAM 2012
PublisherNational Committee on Applied Mechanics
Pages409-418
Number of pages10
ISBN (Print)9781922107619
Publication statusPublished - 2012
Externally publishedYes
Event7th Australasian Congress on Applied Mechanics, ACAM 2012 - Adelaide, SA, Australia
Duration: 2012 Dec 92012 Dec 12

Publication series

NameAdvances in Applied Mechanics Research, Conference Proceedings - 7th Australasian Congress on Applied Mechanics, ACAM 2012

Conference

Conference7th Australasian Congress on Applied Mechanics, ACAM 2012
CountryAustralia
CityAdelaide, SA
Period12/12/912/12/12

Keywords

  • Aluminium alloy
  • Equal-Channel Angular Pressing
  • Impact extrusion
  • Semi-solid cast
  • Severe Plastic Deformation
  • Ultrafine grained materials

ASJC Scopus subject areas

  • Mechanics of Materials

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  • Cite this

    Natori, K., Yashima, T., Arao, Y., & Tanaka, T. (2012). Forming of housing by impact extrusion press using ultrafine-grained semi-solid light metal. In Advances in Applied Mechanics Research, Conference Proceedings - 7th Australasian Congress on Applied Mechanics, ACAM 2012 (pp. 409-418). (Advances in Applied Mechanics Research, Conference Proceedings - 7th Australasian Congress on Applied Mechanics, ACAM 2012). National Committee on Applied Mechanics.