SYMPOSIA PAPER Published: 01 January 1975

Stress-Rupture Strength and Microstructural Stability of W-Hf-C Wire-Reinforced Superalloy Composites


W-Hf-C/superalloy composites were found to be potentially useful for turbine blade applications on the basis of stress-rupture strength. The 100- and 1000-h rupture strengths obtained for 70 volume percent fiber composites tested at 1090°C (2000°F) were 420 and 280 MN/m2 (61 000 and 41 000 psi). The investigation indicated that with better quality fibers, composites having 100- and 1000-h rupture strengths of 570 and 370 MN/m2 (82 000 and 54 000 psi) may be obtained. Metallographic studies indicated sufficient fiber-matrix compatibility for long-time applications at 1090°C (2000°F) for 1000 h or more.

Author Information

Petrasek, DW
Lewis Research Center, Cleveland, Ohio
Signorelli, RA
Lewis Research Center, Cleveland, Ohio
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Developed by Committee: D30
Pages: 405–424
DOI: 10.1520/STP32323S
ISBN-EB: 978-0-8031-4660-0
ISBN-13: 978-0-8031-0309-2