Estimation of Grain Boundary Diffusivity in Near-Alpha Titanium Polycrystals (Preprint)

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-6...

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Main Authors: Pilchak, Adam L, John, Reji, Brockman, Robert A, Porter, III, W J
Format: Report
Language:English
Subjects:
BACKSCATTERING
DIFFUSIVITY
ELECTRON BACKSCATTERING
GRAIN BOUNDARIES
GRAIN BOUNDARY DIFFUSION
MICROMECHANICAL MODELING
OXIDATION
OXYGEN
PE62102F
Properties of Metals and Alloys
TITANIUM ALLOYS
WUAFRLLM121100
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creator Pilchak, Adam L
John, Reji
Brockman, Robert A
Porter, III, W J
description 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. Prepared in collaboration with Univ. of Dayton Research Inst., Dayton, OH. Preprint journal article to be submitted to Scripta Materialia.
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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. Prepared in collaboration with Univ. of Dayton Research Inst., Dayton, OH. 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source DTIC Technical Reports
subjects BACKSCATTERING
DIFFUSIVITY
ELECTRON BACKSCATTERING
GRAIN BOUNDARIES
GRAIN BOUNDARY DIFFUSION
MICROMECHANICAL MODELING
OXIDATION
OXYGEN
PE62102F
Properties of Metals and Alloys
TITANIUM ALLOYS
WUAFRLLM121100
title Estimation of Grain Boundary Diffusivity in Near-Alpha Titanium Polycrystals (Preprint)
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