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[7724] Artykuł: Plastic flow of CuTi alloys at elevated temperatures(Odkształcenie plastyczne stopów Cu-Ti w podwyższonych temperaturach)Czasopismo: Archives of Metallurgy and Materials Tom: 46, Zeszyt: 4, Strony: 361-373 ISSN: 1733-3490 Wydawca: POLISH ACAD SCIENCES COMMITTEE METALLURGY, AL MICKIEWICZA 30, AGH, PAW., A-4,III P., POK 312B, 30-059 KRAKOW, POLAND Opublikowano: 2001 Autorzy / Redaktorzy / Twórcy
Grupa MNiSW: Publikacja w recenzowanym czasopiśmie wymienionym w wykazie ministra MNiSzW (część B) Punkty MNiSW: 6 Klasyfikacja Web of Science: Article Pełny tekst Web of Science YADDA/CEON Keywords: Mechanical properties  Hot deformation  Property composition relationship  Binary alloys  Titanium alloys  Copper base alloys  Plastic flow  Plastic deformation  |
Copper - titanium alloys containing 0.1, 1.0, 2.5 and 5.6 percent wt. of titanium were tensile tested in the temperature range 25°C - 700°C. Alloys of 1.0% to 5.6% titanium content, aged on the peak of hardness before the tensile test, exhibit plateau of the proof stress vs temperature of deformation between 25°C and 300°C. This result is comparable with that reported for precipitation hardened beryllium bronze tested at elevated temperatures. During straining of solution treated copper-titanium alloys, the dynamic strain ageing phenomenon occurs. Instability of the load (Portevi n L e Chatelie r effect), maximum of the proof stress vs temperature of deformation, decrease of the strain rate sensitivity together with transient of load on change of the crosshead speed and drastic decrease of total elongation of the specimens were observed. A considerable reduction of the total elongation of samples aged before the trensile test on the peak of hardness also takes place. Effects of dynamic strain ageing were more pronounced in alloys with higher concentration of titanium.