期刊
SCRIPTA MATERIALIA
卷 60, 期 7, 页码 496-499出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.11.040
关键词
Beta21S; Titanium alloy; Grain growth; Zener pinning; Activation energy
Trace boron additions to the P titanium alloy Ti-15Mo-2.6Nb-3Al-0.2Si (wt.%) lead to significant grain refinement of the ascast microstructure and precipitation of TiB whiskers along the grain boundaries. The TiB is very effective in restricting the P grain boundary mobility by Zener pinning. A model is developed to predict the maximum grain size as a function of TiB size, orientation and volume fraction. Good agreement between model predictions and experimental results was obtained. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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