In situ scanning electron microscopy observations of tensile deformation in a boron-modified Ti-6Al-4V alloy

C. J. Boehlert, C. J. Cowen, S. Tamirisakandala, D. J. McEldowney, D. B. Miracle

Research output: Contribution to journalArticle

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Abstract

In situ scanning electron microscopy was performed during both room temperature and 480 °C tensile deformation of a boron-modified Ti-6Al-4V alloy, in order to characterize the deformation evolution. The sequence of observable surface deformation events was: TiB whisker microcracking at stresses well below the global yield stress, multiple and extensive TiB cracking after global yielding, α + β phase slip emanating from the cracked TiB whiskers, localized shear band formation and propagation leading to cracking in the α + β phases, and ductile sample failure. TiB cracking was also observed throughout the subsurface locations on post-deformed samples. The early microcracking of TiB particles did not degrade mechanical properties, and higher tensile and ultimate strengths were obtained with a ductile fracture mode at quasi-static tensile elongations equivalent to conventional Ti-6Al-4V.

LanguageEnglish (US)
Pages465-468
Number of pages4
JournalScripta Materialia
Volume55
Issue number5
DOIs
StatePublished - Sep 2006

Profile

tensile deformation
Boron
Microcracking
boron
Scanning electron microscopy
scanning electron microscopy
tensile strength
elongation
slip
Ductile fracture
Shear bands
mechanical properties
shear
Yield stress
propagation
Elongation
room temperature
Mechanical properties
titanium alloy (TiAl6V4)
Temperature

Keywords

  • Fracture
  • SEM
  • Tension test
  • Titanium alloys

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Metals and Alloys

Cite this

In situ scanning electron microscopy observations of tensile deformation in a boron-modified Ti-6Al-4V alloy. / Boehlert, C. J.; Cowen, C. J.; Tamirisakandala, S.; McEldowney, D. J.; Miracle, D. B.

In: Scripta Materialia, Vol. 55, No. 5, 09.2006, p. 465-468.

Research output: Contribution to journalArticle

Boehlert, C. J. ; Cowen, C. J. ; Tamirisakandala, S. ; McEldowney, D. J. ; Miracle, D. B./ In situ scanning electron microscopy observations of tensile deformation in a boron-modified Ti-6Al-4V alloy. In: Scripta Materialia. 2006 ; Vol. 55, No. 5. pp. 465-468
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