Grain refinement in a single titanium powder particle impacted at high velocity

被引：144

作者：

Kim, KeeHyun ^{[1
]}

Watanabe, Makoto ^{[1
]}

Kawakita, Jin ^{[1
]}

Kuroda, Seiji ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Composites & Coatings Ctr, Tsukuba, Ibaraki 3050047, Japan

来源：

SCRIPTA MATERIALIA | 2008年 / 59卷 / 07期

关键词：

grain refining; plastic deformation; recrystallization; transmission electron microscopy; warm spray;

D O I：

10.1016/j.scriptamat.2008.06.020

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：768 / 771

页数：4

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