The study of microstructure TiNb based alloys with different heat treatment

• Autorzy: Štěpán, P. , Losertová, M. , Petlák, D.
• Konferencja: Międzynarodowe Sympozjum Metody oceny struktury oraz własności materiałów i wyrobów (XXV ; 12-14.10.2010 ; Turawa, Polska)
• Języki publikacji: EN

Abstrakty

EN

The study of TiNb-based alloys that are suitable candidates for substitution of TiNi in many biocompatible applications was performed. The experimental alloys with two nominal compositions Ti22Nb and Ti25Nb (at.%) were prepared by plasma melting of TiNb master alloy (55/45 wt.%) and Ti pieces. Different conditions of heat treatment were performed and consisted of homogenisation annealing at 1100°C for 12 hours in flowing Ar gas and water quenching and solution annealing at 900°C for 1 hour in flowing Ar gas and water quenching followed by precipitation aging at different temperatures (200, 400 and 600°C) for 1 hour. The metallographic observation and phase microanalysis of the alloys proved the composition homogeneity. The microstructure of Ti22Nb and Ti25Nb samples after plasma melting was dendritic with very fine martensite needles. After solid solution annealing of plasma melted alloys, the presence of ? phase and " martensite in the microstructure was observed. The microhardness values showed obvious relation with heat treatment and aging. The annealing at 1100°C and quenching increased microhardness because the dendritic and martensite microstructure changed to lamellar one. Furthermore, the higher Nb content in Ti25Nb alloy decreased microhardness of the samples in plasma melted as well as annealed conditions by reason of increasing amount of beta phase.

Słowa kluczowe

PL

TiNb; stop; komponent; obróbka

EN

TiNb; alloy; component; treatment

• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2010
• Tom: z. 97
• Strony: 33-33
• Opis fizyczny: Bibliogr. 6 poz., rys., tab., wykr.

Twórcy

autor

Štěpán, P.

autor

Losertová, M.

autor

Petlák, D.

• VŠB-TU Ostrava

Bibliografia

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