Kinetics of Grain Growth in 718 Ni-Base Superalloy

• Autorzy: Huda Z. , Zaharinie T. , Metselaar H. S. C. , Ibrahim S. , Min Goh J.

Identyfikatory

DOI

10.2478/amm-2014-0143

Warianty tytułu

PL

Kinetyka wzrostu ziaren w nadstopie niklu 718

• Języki publikacji: EN

Abstrakty

EN

The Haynes® 718 Ni-base superalloy has been investigated by use of modern material characterization, metallographic and heat treatment equipment. Grain growth annealing experiments at temperatures in the range of 1050 – 1200 oC (1323–1473K) for time durations in the range of 20 min-22h have been conducted. The kinetic equations and an Arrhenius-type equation have been applied to compute the grain-growth exponent n and the activation energy for grain growth, Q_g, for the investigated alloy. The grain growth exponent, n, was computed to be in the range of 0.066-0.206; and the n values have been critically discussed in relation to the literature. The activation energy for grain growth, Q_g, for the investigated alloy has been computed to be around 440 kJ/mol; and the Q_g, data for the investigated alloy has been compared with other metals and alloys and ceramics; and critically analyzed in relation to our results.

PL

Nadstop na bazie niklu Haynes ® 718 badano przy użyciu nowoczesnych urządzeń do charakterystyki materiałów, metalografii i obróbki cieplnej. Przeprowadzono badania wzrostu ziarna podczas wyżarzania w zakresie temperatur 1050 - 1200 ° C (1323-1473K) w czasie trwania od 20 minut do 22 godzin. Równania kinetyczne i równanie typu Arrheniusa zostały zastosowane do obliczania wykładnika wzrostu ziarna n oraz energii aktywacji wzrostu ziarna, Q_g, dla badanego stopu. Obliczona wartość wykładnika wzrostu ziarna, n, mieści się w zakresie od 0.066 do 0.206 i została krytycznie przedyskutowana w odniesieniu do literatury. Obliczona energia aktywacji wzrostu ziaren, Q_g, wynosi dla badanego stopu na około 440 kJ / mol. Dane Q_g dla badanego stopu porównywano z danymi dla innych metali, stopów i ceramiki oraz krytycznie analizowano w odniesieniu do naszych wyników.

Słowa kluczowe

EN

nickel-base superalloy; microstructures; grain growth; kinetics; activation energy

PL

nadstop niklu; mikrostruktura; wzrost ziaren; kinetyka; energia aktywacji

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2014
• Tom: Vol. 59, iss. 3
• Strony: 847--852
• Opis fizyczny: Bibliogr. 31 poz., rys., tab.

Twórcy

autor

Huda Z.

• Department Of Engineering, Nilai University, Nilai, 71800 Negeri Sembilan, Malaysia

autor

Zaharinie T.

• Department Of Mechanical Engineering, University Of Malaya, 50603 Kuala Lumpur, Malaysia

autor

Metselaar H. S. C.

• Department Of Mechanical Engineering, University Of Malaya, 50603 Kuala Lumpur, Malaysia

autor

Ibrahim S.

• Department Of Mechanical Engineering, University Of Malaya, 50603 Kuala Lumpur, Malaysia

autor

Min Goh J.

• Department Of Mechanical Engineering, University Of Malaya, 50603 Kuala Lumpur, Malaysia

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