Effect of tube processing methods on the texture and grain boundary characteristics of 14YWT nanostructured ferritic alloys

E. Aydogan, S. Pal, O. Anderoglu, S. A. Maloy, S. C. Vogel, G. R. Odette, J. J. Lewandowski, D. T. Hoelzer, I. E. Anderson, J. R. Rieken

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Texture and microstructure of tubes and plates fabricated from a nanostructured ferritic alloy (14YWT), produced either by spray forming followed by hydrostatic extrusion (Process I) or hot extrusion and cross-rolling a plate followed by hydrostatic tube extrusion (Process II) have been characterized in terms of their effects on texture and grain boundary character. Hydrostatic extrusion results in a combination of plane strain and shear deformations which generate low intensity α- and γ-fiber components of {001}<110> and {111}<110> together with a weak ζ-fiber component of {011}<211> and {011}<011>. In contrast, multi-step plane strain deformation by hot extrusion and cross-rolling of the plate leads to a strong texture component of {001}<110> together with a weaker {111}<112> component. Although the total strains are similar, shear dominated deformation leads to much lower texture indexes compared to plane strain deformations. Further, the texture intensity decreases after hydrostatic extrusion of the alloy plate formed by plane strain deformation, due to a lower number of activated slip systems during shear dominated deformation. Notably, hot extruded and cross-rolled plate subjected to plane strain deformation to ~50% engineering strain creates only a modest population of low angle grain boundaries, compared to the much larger population observed following the combination of plane strain and shear deformation of ~44% engineering strain resulting from subsequent hydrostatic extrusion.

Original languageEnglish
Pages (from-to)222-232
Number of pages11
JournalMaterials Science and Engineering: A
Volume661
DOIs
StatePublished - Apr 20 2016

Bibliographical note

Publisher Copyright:
© 2016.

Keywords

  • EBSD
  • Nanostructured ferritic alloys
  • Neutron diffraction
  • Texture

Fingerprint

Dive into the research topics of 'Effect of tube processing methods on the texture and grain boundary characteristics of 14YWT nanostructured ferritic alloys'. Together they form a unique fingerprint.

Cite this