Journal
SCRIPTA MATERIALIA
Volume 59, Issue 7, Pages 768-771Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.06.020
Keywords
grain refining; plastic deformation; recrystallization; transmission electron microscopy; warm spray
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government
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Titanium powder particles were deposited at high velocity on a steel substrate by a process called warm spraying. Extremely fine grains, several tens of nanometers in size, were observed along the interfacial boundary of the deposited particles known as splats and the substrate, where the most severe deformation had taken place. A schematic model to explain the mechanism of grain refinement of titanium powder is presented, in which dynamic recrystallization caused by adiabatic shear instability plays the major role. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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