SEDL / STP / STP580-EB / STP32323S

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

Petrasek, DW
Lewis Research Center, Cleveland, Ohio

Signorelli, RA
Lewis Research Center, Cleveland, Ohio

Pages: 20    Published: Jan 1975

Download this paper for $25 PDF (448K)          View License Agreement
Abstract

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.