Phase transformations in Ti-3Al-8V-6Cr-4Zr-4Mo
Journal Article
·
· Metall. Trans., A; (United States)
The time-temperature-transformation behavior of a metastable ..beta..-titanium alloy, Ti-3Al-8V-6Cr-4Zr-4Mo (RMI 38644), has been examined using hardness, X-ray measurements, and optical and transmission electron microscopy. This examination has shown that a variety of metastable and stable phases may form in this alloy system. These include metastable zones, ..omega.., both Burgers (Type 1) ..cap alpha.. and non-Burgers (Type 2) ..cap alpha.., TiCr/sub 2/, and a Ti-Zr-silicide. A composite TTT diagram is presented which describes the influence of aging time and temperature on the stability of these phases. Finally, the appearance of these transformation products is correlated with the observed hardness changes when RMI 38644 is aged at elevated temperatures.
- Research Organization:
- Sandia Labs, Albuquerque, NM
- OSTI ID:
- 5941137
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 10A:7; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
AGING
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
GRAIN BOUNDARIES
HARDNESS
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
ORIENTATION
PHASE STUDIES
PHASE TRANSFORMATIONS
PRECIPITATION
SEPARATION PROCESSES
TEMPERATURE DEPENDENCE
TITANIUM
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TITANIUM-BETA
TRANSITION ELEMENTS
ZIRCONIUM ALLOYS
360102* -- Metals & Alloys-- Structure & Phase Studies
AGING
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
GRAIN BOUNDARIES
HARDNESS
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
ORIENTATION
PHASE STUDIES
PHASE TRANSFORMATIONS
PRECIPITATION
SEPARATION PROCESSES
TEMPERATURE DEPENDENCE
TITANIUM
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TITANIUM-BETA
TRANSITION ELEMENTS
ZIRCONIUM ALLOYS