PHASE-TRANSFORMATIONS IN TI3AL AND TI3AL + MO ALUMINIDES

被引：25
|
作者：
DJANARTHANY, S
SERVANT, C
PENELLE, R
机构：
[1] Laboratoire de Métallurgie Structurale, USCNRS 1107, Bât 410-413, Université de Paris Sud, Orsay, Cedex
来源：
JOURNAL OF MATERIALS RESEARCH | 1991年 / 6卷 / 05期
关键词：
D O I：
10.1557/JMR.1991.0969
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have analyzed the phase relationships in two titanium aluminides containing 3.4 at. % Mo with different aluminum compositions. The alloys were first homogenized in the beta field, then cooled continuously at different cooling rates from 80-degrees-C/s to 0.1-degrees-C/s. The continuous cooling transformation diagrams (CCT) show that phase transformations and resulting microstructures are highly dependent on cooling rate. The microstructure consists of ordered alpha-2 (DO19), ordered beta-0 (B2), and athermal omega (hexagonal) phases. The "tweed microstructure" is observed. The evolution of microhardness was determined as well as the relative partitioning of Al and Mo in (alpha-2', alpha-2) and beta-0 phases as a function of cooling rate.
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页码：969 / 986
页数：18
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