Accession Number:

ADA550536

Title:

Stress Corrosion Cracking Facet Crystallography of Ti-8Al-1Mo-1V (Preprint)

Descriptive Note:

Journal article preprint

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIR METALS CERAMICS AND NONDESTRUCTIVE EVALUATION DIV/METALS BRANCH

Report Date:

2011-05-01

Pagination or Media Count:

36.0

Abstract:

The spatial and crystallographic orientations of facets formed during stress corrosion cracking of Ti-8Al-1Mo-1V have been characterized using quantitative fractography and electron backscatter diffraction. The results indicate that most facets are formed nearly perpendicular to the loading direction on irrational hkil planes. The facets were imaged with high resolution scanning electron microscopy and were found to contain evidence of localized plastic flow despite their brittle appearance at moderate magnification. Some fracture planes were related to titanium-hydride habit planes however, the mechanism of faceted growth does not appear to involve hydride nucleation, growth, and fracture, but rather hydrogen enhanced localized plasticity.

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE