Quantitative assessment of thermal diffusion using NDE

Keywords

Nondestructive Evaluation, Wave Attenuation, Thermal Diffusivity, Diffusion in Nanoscale Solids

Abstract

. Traditionally, transport in solids is most often described by linear driving forces attributed to chemical potential gradients. However there are a growing number of processes in which the driving forces arising from thermal gradients cannot be ignored. For example, the mechanisms responsible for the grain refinement caused by electropulse processing are not known, but there is reason to suspect that thermal gradients play a significant role. The mathematical description of thermal diffusion (Soret effect) is well established, but the ability to perform in situ measurement of the effect of this driving force needs further development. The contribution of thermal gradients to the mass transport occurring during advanced processing and in nanostructured materials thus requires new assessment tools to achieve a better understanding of the atomic processes involved. This paper describes an NDE method that may offer mechanistic insights into the material transport effects of thermal diffusion.

Original Publication Citation

C. T. Howard, E. A. Pfeif, J. M. Porter, B. Mishra, and D. L. Olson, Quantitative assessment of thermal diffusion using NDE, AIP Conference Proceedings, vol. 1511, no. 1, (2014) pp. 1143–1149.

Document Type

Conference Paper

Publication Date

2014

Publisher

AIP Publishing LLC

Language

English

College

Ira A. Fulton College of Engineering and Technology

Department

Mechanical Engineering

University Standing at Time of Publication

Associate Professor

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