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Ultrahigh temperature intermetallic alloys

Description: A new family of Cr-Cr{sub 2}Ta intermetallic alloys based on Cr-(6--10)Ta (at.%) is under development for structural use in oxidizing environments in the 1,000-1,300 C (1,832--2,372 F) temperature range. Development objectives relate to high temperature strength and oxidation resistance and room temperature fracture toughness. The 1,200 C (2,192 F) strength goals have been met: yield and fracture strengths of 275 MPa (40 ksi) and 345 MPa (50 ksi), respectively, were achieved. Progress in attain… more
Date: November 1, 1998
Creator: Brady, M. P.; Zhu, J. H.; Liu, C. T.; Tortorelli, P. F.; Wright, J. L. & Carmichael, C. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fracture in Bulk Amorphous Alloys

Description: The fracture behavior of a Zr-based bulk amorphous alloy, Zr-10 AI-5 Ti-17.9 Cu-14.6 Ni, was examined by transmission electron microscopy (TEM) and x-ray diffraction for any evidence of crystallization preceding crack propagation. No evidence for crystallization was found in shear bands in compression specimens or at the fracture surface in tensile specimens. In- situ TEM deformation experiments were performed to more closely examine actual crack tip regions. During the in-situ deformation expe… more
Date: November 30, 1998
Creator: Horton, J. A. & Wright, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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