The effect of cooling rate on selected structural parameters of advanced cast Ni – base superalloys

• Autorzy: Belan J. , Vaško A. , Kuchariková L. , Švecová I.
• Języki publikacji: EN

Abstrakty

EN

The Ni – base superalloys are used in aircraft industry for production of aero engine most stressed parts, as are turbine blades or turbine discs. The most stressing factor at Ni – base superalloys loading or working conditions are high temperature range of 700°C up to 850°C and, of course, centrifugal forces, and small vibrations, which produce bending of turbine blades inserted into turbine discs. All these factors cause various forms of microstructure degradation closely connected with decreasing of mechanical properties and shortening of working life as well. From this reason a dendrite arm spacing, carbides size and distribution, morphology, number and value of γ’ - phase are very important structural characteristics for blade lifetime prediction as well as aero engine its self. In this article are used methods of quantitative metallography for evaluation of structural characteristics mentioned above on experimental materials – Ni base superalloys ŽS6K and Inconel IN 738. The high temperature effect represented here by heat treatment at 800°C for 10 hours, and cooling rate, here represented by three various cooling mediums as water, air, and oil, on structural characteristics and application of quantitative methods evaluation with using of SEM are presented in this paper.

Słowa kluczowe

EN

Ni-base superalloys; quantitative metallography methods; cooling rate; secondary dendrite arms spacing; gamma prime evaluation; carbide evaluation; heat treatment

PL

superstopy na bazie niklu; obróbka cieplna; rozstaw ramion dendrytu; rozmiar węglików; rozkład węglików; metody metalografii ilościowej

• Wydawca: Oficyna Wydawnicza Stowarzyszenia Menedżerów Jakości i Produkcji
• Czasopismo: Zeszyty Naukowe. Quality. Production. Improvement
• Rocznik: 2017
• Tom: No. 1 (6)
• Strony: 20--30
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Belan J.

• University of Žilina, Faculty of Mechanical Engineering, Department of Materials Science, Univerzitná 8215/1, 01026 Žilina, Slovakia

autor

Vaško A.

• University of Žilina, Faculty of Mechanical Engineering, Department of Materials Science, Univerzitná 8215/1, 01026 Žilina, Slovakia

autor

Kuchariková L.

• University of Žilina, Faculty of Mechanical Engineering, Department of Materials Science, Univerzitná 8215/1, 01026 Žilina, Slovakia

autor

Švecová I.

• University of Žilina, Faculty of Mechanical Engineering, Department of Materials Science, Univerzitná 8215/1, 01026 Žilina, Slovakia

Bibliografia

• 1. COPLEY S.M., KEAR B.H. 1967. Structural characteristics of superalloys, part I. „The Minerals, Metals & Materials Society – The American Institute of Mining, Metallurgical, and Petroleum Engineers” 239, pp. 977–983.
• 2. COPLEY S.M., KEAR B.H. 1967. Structural characteristics of superalloys, part II. „The Minerals, Metals & Materials Society – The American Institute of Mining, Metallurgical, and Petroleum Engineers” 239, pp. 984–989.
• 3. DONACHIE M.J., DONACHIE S.J. 2002. Superalloys – A technical Guide. ASM International. USA.
• 4. LEVERANT G.R., KEAR B.H. 1970. Mechanical properties of advanced superalloys. „Metallurgical and Materials Transactions” 1, pp. 491-498.
• 5. JACKSON J.J. 1977. Evaluation of superalloys structural characteristics. „Metallurgical and Materials Transactions” 8A(10), pp. 1615–1620.
• 6. GELL M., DUHL D.N. 1985. Progressive technologies in superalloys. „Advanced high temperature alloys” ASM. USA.
• 7. CHALUPOVÁ M., TILLOVÁ E., FARKAŠOVÁ M. 2014. Microstructure analysis of AlSi10MgMn aluminium cast alloy. “Materials Science Forum” 782, pp. 365-368.
• 8. SKOČOVSKÝ P., MATEJKA M. 1994. Cast iron microstructure – metallography handbook. EDISŽU Žilina (in Slovak).
• 9. SKOČOVSKÝ P., VAŠKO A. 2007. The quantitative evaluation of cast iron structure 1st Edition. EDIS, Žilina. (in Slovak).
• 10. BELAN J., SKOČOVSKÝ P. 2005. The quantitative metallography of Ni – base superalloys.„XX MIEDZYNARODOWE SYMPOZJUM, Metody oceny struktury oraz własności materialow i wyrobów”, pp. 83–88.
• 11. TILLOVÁ E., PANUŠKOVÁ M. 2008. Effect of Solution Treatment on Intermetallic Phase’s Morphology in AlSi9Cu3 Cast Alloy. “Mettalurgija” 47, pp. 133-137.
• 12. TILLOVÁ E., CHALUPOVÁ M., HURTALOVÁ L., BONEK M., DOBRZANSKI L. A. 2011. Structural analysis of heat treated automotive cast alloy. “Journal of Achievements in Materials and Manufacturing Engineering” 47, pp. 19-25.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).