Factors influencing the shearing patterns in equal-channel angular pressing

Minoru Furukawa, Zenji Horita, Terence G. Langdon

Research output: Contribution to journalArticle

242 Citations (Scopus)


The shearing patterns are calculated for equal-channel angular pressing (ECAP) under three different conditions: (i) rotation of a sample around the X-axis when using a die angle of 90°, (ii) rotation around the X-axis when using a die angle of 120° and (iii) rotation around the Y- and Z-axes when using plate samples with a die angle of 90°. Separate sets of shearing patterns are constructed for the four standard processing routes: route A with no rotation of the sample between consecutive passes, routes BA and BC with rotations of 90° in alternate directions or the same direction between each pass, and route C with a rotation of 180° between passes. It is concluded that the development of a uniform microstructure of equiaxed grains, separated by high-angle grain boundaries, is favored using route BC because (i) shearing occurs over large angular ranges on the three orthogonal planes within the sample, (ii) there is a regular and periodic restoration of an equiaxed structure during consecutive pressing and (iii) deformation occurs on each orthogonal plane.

Original languageEnglish
Article number15373
Pages (from-to)97-109
Number of pages13
JournalMaterials Science and Engineering A
Issue number1-2
Publication statusPublished - Jan 1 2002

All Science Journal Classification (ASJC) codes

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

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