Enhancement of bending formability of brittle sheet metal in multilayer metallic sheets

J. Yanagimoto, T. Oya, S. Kawanishi, N. Tiesler, T. Koseki

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


The formability of multilayer metallic sheets is evaluated by tensile, V-bending, hat bending and hemming tests. A monolithic type-420J2 stainless steel sheet cannot be formed because of poor elongation as small as 1.7%. Marked enhancement of the bending formability was observed in the bending of type-420J2 stainless steel sheets when they are layered by type-304 stainless steel sheets and composed into a multilayer metallic sheet. The mechanism of the enhancement of the formability of type-420J2 stainless steel in a multilayer metallic sheet is investigated analytically by focusing on the delay of the initiation of necking, and by performing stress analysis by finite element method (FEM).

Original languageEnglish
Pages (from-to)287-290
Number of pages4
JournalCIRP Annals - Manufacturing Technology
Issue number1
Publication statusPublished - 2010
Externally publishedYes


  • Enhanced formability
  • Multilayer metallic sheet
  • Sheet metal forming

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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