Measurement of hydrogen in Ti-Al alloy by RBS
EMSL Project ID
1714
Abstract
Although there are hundreds of intermetallic compounds, only a few are being developed as structural materials for a broad range of applications. Among the titanium aluminide intermetallics, Ti3Al and TiAl are potential candidates for applications in aerospace systems and automobiles because of their low density and high temperature strength properties. In spite of the combination of excellent properties, the use of these intermetallics is limited because of the poor ductility. Another important factor which limits the wide spread use of TiAl based intermetallics is the prohibitively high cost of the alloy. Recent research shows that the TiAl-based alloys are more attractive compared to Ti3Al because of their lower density , higher modulus, higher creep and oxidation limit temperatures. This proposal aims at producing TiAl and its modifications by a method of synthesis which would produce the intermetallic compounds directly from titanium hydride and aluminum by a combination of mechanical alloying and heat treatments during consolidation by hot isostatic pressing. The use of hydrogen as a temporary alloying element is advantageous. This proposed work between the University of Idaho and PNNL would open up a new area in the processing of Ti-Al alloys at low cost. The Ti-Al alloys will be produced at the Institute for Materials and Advanced Processes (IMAP), University of Idaho, by mechanical alloying followed by HIP'ing. The measurement of hydrogen in the alloy will be carried out at EMSL. On the basis of the information on hydrogen content, after different levels of heat treatments of the consolidated alloys, the processing parameters will be modified to control the microstructure of the alloys. Characterization of the alloys will be carried out at IMAP, using XRD, SEM and TEM.
Project Details
Project type
Exploratory Research
Start Date
1999-10-13
End Date
2001-01-01
Status
Closed
Released Data Link
Team
Principal Investigator