Campus Units

Materials Science and Engineering

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

3-1-2017

Journal or Book Title

Materials Science and Engineering: A

Volume

668

First Page

524

Last Page

531

DOI

10.1016/j.msea.2017.02.029

Abstract

The surface of Ti-6Al-4V was treated mechanically by applying ultrasonic nanocrystal surface modification. The effect of this treatment on the hardness, compressive residual stresses and fatigue performance were investigated. It is shown that in terms of the measured nanoindentation hardness values and the presence of compressive residual stresses, the treated sample only differed from the as-received sample in the first 200–300 µm area far from the surface. Also, the microstructure very close to the treated surface (<5 µm) was characterized using a relatively new transmission orientation microscopy technique named ASTAR™/precession electron diffraction. Based on different types of results (e.g., index map and virtual bright field image) acquired by this technique, it is concluded that titanium grains smaller than 10 nm exist within the distance of less than 1 µm from the treated surface. Difficulties associated with ASTAR™/precession electron diffraction technique to characterize this challenging near-surface area are discussed.

Comments

This is a manuscript of an article published as Ghamarian, I., P. Samimi, A. Telang, V. K. Vasudevan, and P. C. Collins. "Characterization of the near-surface nanocrystalline microstructure of ultrasonically treated Ti-6Al-4V using ASTAR™/precession electron diffraction technique." Materials Science and Engineering: A 688 (2017): 524-531. doi: 10.1016/j.msea.2017.02.029. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Copyright Owner

Elsevier, B.V.

Language

en

File Format

application/pdf

Published Version

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