Microstructural evolution in joining of TiAl with a liquid Ti alloy
- Univ. of Cincinnati, OH (United States). Dept. of Materials Science and Engineering
In this study, the reaction between titanium aluminide and a liquid titanium alloy, 70Ti-15Cu-15Ni in wt%, was investigated in order to reveal the behavior of TiAl during joining. The microstructural evolution of the reacted melt during solidification was also studied. Issues of concern in this study include: (1) the solidification process of the melt upon termination of heating, and (2) the diffusion of Cu and Ni into the substrate during processing. To accurately control the extent of reaction, an innovative infrared processing technique was used. Infrared processing can produce heating rates exceeding 100 C/s up to the processing temperature and cooling to below 500 C in a few seconds. Such rapid rates of processing decreases or eliminates the adverse effects associated with prolonged heating. In this study, experiments were conducted at various heating times in order to investigate the solidified zone microstructure, melt affected zone thickness, and base material microstructure. The system investigated in this study is directly related to joining of titanium aluminide with a titanium brazing alloy. Meanwhile, the evolution of the microstructure may be applied to other solid-liquid reactions of titanium alloys.
- OSTI ID:
- 6897329
- Journal Information:
- Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 32:1; ISSN 0956-716X; ISSN SCRMEX
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ALUMINIUM ALLOYS
BRAZING ALLOYS
COPPER
COPPER ALLOYS
DATA
ELEMENTS
EXPERIMENTAL DATA
FABRICATION
FLUIDS
INFORMATION
INTERMETALLIC COMPOUNDS
JOINING
LIQUID METALS
LIQUIDS
METALS
MICROSTRUCTURE
NICKEL
NICKEL ALLOYS
NUMERICAL DATA
TITANIUM ALLOYS
TRANSITION ELEMENTS