The effect of cold rolling on the grain boundary character and creep rupture properties of INCONEL alloy 718

C. J. Boehlert, S. Civelekoglu, N. Eisinger, G. Smith, J. Crum

Research output: Research - peer-reviewArticle

Abstract

In order to evaluate the effects of sheet processing on the grain boundary character distribution (GBCD) of INCONEL® alloy 718 (IN 718), electron backscattered diffraction (EBSD) mapping was performed on samples cold rolled between 0-40%. Increased cold rolling increased the fraction of low-angle boundaries at the expense of the coincident site lattice boundaries. The tensile-creep rupture life (Tr) and elongation-to-failure (εf) were evaluated at 649°C and 758MPa, and the data indicated that increased cold rolling significantly increased both the Tr and εf values. In addition the GBCD and room-temperature (RT) tensile properties were evaluated for superplastically formed INCONEL® alloy 718 (IN 718SPF). The tensile results indicated the exceptional strength of the fine-grained IN 718SPF material, however the GBCD parameters were intermediate to those of the 10% and 20% cold rolled IN 718 materials.

LanguageEnglish (US)
Pages761-766
Number of pages6
JournalMaterials Science Forum
Volume426-432
Issue number1
StatePublished - 2003
Externally publishedYes

Profile

Cold rolling
Creep
Grain boundaries
cold rolling
grain boundaries
Tensile properties
Electron diffraction
Elongation
Processing
Temperature
tensile creep
tensile properties
elongation
electron diffraction
room temperature

Keywords

  • Creep
  • Electron backscatter diffraction
  • Microstructure
  • Superalloy

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

The effect of cold rolling on the grain boundary character and creep rupture properties of INCONEL alloy 718. / Boehlert, C. J.; Civelekoglu, S.; Eisinger, N.; Smith, G.; Crum, J.

In: Materials Science Forum, Vol. 426-432, No. 1, 2003, p. 761-766.

Research output: Research - peer-reviewArticle

Boehlert, C. J. ; Civelekoglu, S. ; Eisinger, N. ; Smith, G. ; Crum, J./ The effect of cold rolling on the grain boundary character and creep rupture properties of INCONEL alloy 718. In: Materials Science Forum. 2003 ; Vol. 426-432, No. 1. pp. 761-766
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