Cyclic creep behaviour of two-phase Ti-6Al-2Mo-2Cr alloy
| Autor: | Waldemar Ziaja, Jan Sieniawski, Maciej Motyka, Krzysztof Kubiak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Alloy 0211 other engineering and technologies Cyclic creep 02 engineering and technology engineering.material Engineering (General). Civil engineering (General) 020303 mechanical engineering & transports 0203 mechanical engineering Phase (matter) 021105 building & construction engineering Composite material TA1-2040 |
| Zdroj: | MATEC Web of Conferences, Vol 321, p 11079 (2020) |
| Popis: | One of the important criteria for selection titanium alloys for discs and blades of turbine engine compressor is their fatigue and creep strength at room and elevated temperature. Fatigue and creep properties of two-phase titanium alloys show strong dependence on microstructure, especially morphology of the α and β phases which can be controlled to certain extent by proper selection of hot working and heat treatment conditions. Quantitative description of two-phase titanium alloys behaviour under loading and environmental conditions leading to combined creep and fatigue processes has been always very challenging task due to large number of factors affecting deformation and fracture behaviour of the material. In the course of the research cyclic creep behaviour of Ti-6Al-2Mo-2Cr alloy (VT3-1) was investigated and compared to low-cycle fatigue and static creep properties at the temperature of 450°C. Microstructure of the alloy was varied by means of the heat treatment. Constant load tensile creep tests were carried out. Tension-tension cyclic loading was applied at the constant stress ratio with and without hold time at maximum load. The effect of test parameters on the creep-fatigue life at elevated temperature was estimated. Characteristic features of fracture surfaces were identified by scanning electron microscopy methods. |
| Databáze: | OpenAIRE |
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