An Auger investigation of the fracture behavior of PST TiAl alloys

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

19 Scopus Citations
View graph of relations

Author(s)

  • L. Heatherly Jr.
  • E. P. George
  • C. T. Liu
  • M. Yamaguchi

Detail(s)

Original languageEnglish
Pages (from-to)281-288
Journal / PublicationIntermetallics
Volume5
Issue number4
Publication statusPublished - 1997
Externally publishedYes

Abstract

Samples of two poly synthetically twinned (PST) TiAl alloys (Ti-49 at% Al and Ti-49 at% Al-0·6 at%Cr) were fractured under different environmental conditions at room temperature, and the fracture surfaces were analyzed using scanning Auger and scanning electron microscopy. These techniques were employed to determine the fracture mode and the chemical composition of the fracture surfaces of the TiAl alloys. Our study clearly indicates that all of the fracture surfaces exposed by bend testing were α2, except when fractures occurred across the lamellae. No chromium enrichment was observed on any of the exposed surfaces. From these observations, it was concluded that the fracture mode for these materials is cleavage through the α2-phase. © 1997 Elsevier Science Limited.

Research Area(s)

  • A. titanium aluminides, based on TiAl, B. fracture mode, B. phase identification, D. phase interfaces

Citation Format(s)

An Auger investigation of the fracture behavior of PST TiAl alloys. / Heatherly Jr., L.; George, E. P.; Liu, C. T.; Yamaguchi, M.

In: Intermetallics, Vol. 5, No. 4, 1997, p. 281-288.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review