Estimation of grain boundary diffusivity in near-α titanium polycrystals

被引：14

作者：

Brockman, Robert A. ^{[1
,2
]}

Pilchak, Adam L. ^{[2
]}

Porter, W. John, III ^{[1
]}

John, Reji ^{[2
]}

机构：

[1] Univ Dayton, Res Inst, Dayton, OH 45469 USA

[2] USAF, Res Lab, Mat & Mfg Directorate, AFRL RXLM, Wright Patterson AFB, OH 45433 USA

来源：

SCRIPTA MATERIALIA | 2011年 / 65卷 / 06期

关键词：

Grain boundary diffusion; Oxidation; Micromechanical modeling; Electron backscattering; OXYGEN;

D O I：

10.1016/j.scriptamat.2011.06.015

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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-CL 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. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：513 / 515

页数：3

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