Analysis of Elevated Temperature Property of Heat Resistant Materials by Internal Friction Method
Designs of advanced heat resistant materials are highly complicated and at high temperatures various strengthening and weakening mechanisms are operative simultaneously. However, usual characterization methods such as creep tests are not necessarily suitable for analyzing the contributions of the individual mechanisms. In this paper, as a nondestructive way of the above type of analysis, the internal friction method is proposed, and details of the technique devised for measurements at very high temperatures are presented together with results of applications to ODS (oxide dispersion-strengthened) NiCr alloy (MA-754) and sintered silicon nitrides.
KeywordsInternal Friction Silicon Nitride Background Component Torsion Pendulum Internal Friction Peak
Unable to display preview. Download preview PDF.
- 2.J. Shioiri and K. Satoh, Elevated Temperature Internal Friction in an Oxide Dispersion-Strengthened Nickel-Chromium Alloy, ASTM STP 864: 648 (1985).Google Scholar
- 4.T. K. Glasgow, An Oxide Dispersion-Strengthened Alloy for Gas Turbine Blades, NASA TM-79088 (1979).Google Scholar
- 5.J. Shioiri, K. Satoh and Y. Fujisawa, Elevated Temperature Internal Friction Due to Composite Structure in Sintered Silicon Nitrides, Proc. IVth Int. Conf. Composite Materials, Japan Society for Composite Materials, 1289 (1982).Google Scholar
- 6.K. Matusue, Y. Fujisawa and K. Takahara, Tensile Strength of Pressureless-Sintered Silicon Nitride at Elevated Temperature, TR-753, National Aerospace Laboratory, Tokyo (1983), in Japanese.Google Scholar