Preliminary Mechanical Property Assessment of an Ultra SCS®/Ti-22A1-23Nb Composite
| Autor: | WS Johnson, JE Masters, DW Wilson, AH Rosenberger, PR Smith, SM Russ |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Titanium aluminide
Materials science Polymers and Plastics Metal matrix composite Metallurgy Composite number Isothermal process chemistry.chemical_compound chemistry Creep visual_art Ultimate tensile strength Materials Chemistry Ceramics and Composites Aluminium alloy visual_art.visual_art_medium Silicon carbide Composite material |
| Zdroj: | Journal of Composites Technology and Research. 21:164 |
| ISSN: | 0884-6804 |
| DOI: | 10.1520/ctr10617j |
| Popis: | The mechanical performance of an orthorhombic-based titanium aluminide matrix composite (OTMC) reinforced with Ultra SCS® silicon carbide continuous monofilament (i.e., Ultra SCS®/Ti-22Al-23Nb) was investigated. Tensile properties, creep resistance, isothermal fatigue, and thermomechanical fatigue were examined over the temperature range from 20 to 760°C, with the bulk of the testing conducted at the upper end of this range to more fully characterize the high-temperature performance of this new composite system. A comparison was made with two similar OTMCs consisting of SCS-6 and Trimarc 1® silicon carbide fiber reinforcement of a Ti-22Al-23Nb matrix. In general, the longitudinal properties benefited significantly as a result of the higher-strength Ultra SCS® fiber. Both the cyclic behavior, isothermal fatigue, and in-phase thermomechanical fatigue, as well as static properties, tension, and creep were improved. However, matrix-dominated performance, including out-of-phase thermomechanical fatigue and transverse properties, was similar or exhibited a slight debit in the Ultra SCS®/Ti-22Al-23 composite. The demonstrated improvement in longitudinal properties makes the Ultra SCS® composite system an excellent choice for rotating components in advanced gas turbine engine applications. However, improvements in transverse properties may still be required for those applications subjected to appreciable off-axis loads. |
| Databáze: | OpenAIRE |
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