Estimation of Grain Boundary Diffusivity in Near-Alpha Titanium Polycrystals (Preprint)
Abstract
The role of enhanced grain boundary diffusivity in high-temperature diffusion of interstitial elements through metals is widely recognized but poorly characterized in most materials. This paper summarizes an effort to estimate grain boundary diffusivity of oxygen in a near-alpha titanium alloy, Ti-6Al-2Sn-4Zr-2Mo-0.1Si, by explicitly incorporating microstructure obtained from electron backscatter diffraction into an analytical model. Attention is focused on near-surface diffusion behavior contributing to the rapid ingress of oxygen and possible crack initiation in high-temperature environments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2011
- Accession Number
- ADA553359
Entities
People
- Adam L. Pilchak
- Reji John
- Robert A. Brockman
- W. J. Porter Iii
Organizations
- Air Force Research Laboratory