Correlation of gamma-gamma prime mismatch and strengthening in Ni/Fe-Ni base alloys containing aluminum and titanium as hardeners

Maniar, Gunvant N.; Bridge, JohnC.; James, Hubert M.; Heydt, G. B.

doi:10.1007/bf02819239

Cited by 31 publications

(1 citation statement)

References 2 publications

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“…Therefore, the specimen surface is prepared by grinding, polishing and etching. For the chemical phase extraction, the application of the two different chemical etchants MoO 3 acid (100 mL H 2 O, 100 mL HCl, 100 mL HNO 3 , 3 g MoO 3 powder; 15 etching time, 5 s) and ‘G’ etchant (12 mL H 3 PO 4 , 47 mL H 2 SO 4 , 41 mL HNO 3 ; 16 etching time, 50 or 60 s) is investigated.…”

Section: Methodsmentioning

confidence: 99%

Influence of chromium on microstructure and etching behaviour of new Ni–Fe–Al based alloy

Niewerth

Necker

Rösler

2015

Materials Science and Technology

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In the present study, the influence of chromium on the microstructure and etching behaviour of the polycrystalline alloy Ni–13Fe–8Al–4Ti (at-) has been examined. The alloy was recently designed for nanomembrane fabrication, but although it showed the necessary γ/γ′ microstructure with cubic, well aligned γ′ precipitates, it proved to be unsuitable for nanomembrane fabrication as the γ matrix was dissolved during chemical etching. To obtain the passivation of the γ matrix, chromium has been added in further modifications containing 1, 2, 3 and 4 at- chromium. Moreover, the influence of heat treatment and the different cooling rates of heat treatment in air/vacuum have been investigated. For chemical phase extraction, the application of the chemical etchants MoO3 acid and ‘G’ etchant has been examined, the formability was characterised by Vickers hardness testing. The main purpose of the present study, namely the passivation of the γ matrix, could be achieved by the addition of 4 at- chromium and etching with ‘G’ etchant.

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Section: Methodsmentioning

confidence: 99%

Influence of chromium on microstructure and etching behaviour of new Ni–Fe–Al based alloy

Niewerth

Necker

Rösler

2015

Materials Science and Technology

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The Effect of Composition on the Gamma Prime Distribution of Ni‐Cr‐Al‐Nb Alloys

Jones

Hardy

Stone

2014

8th International Symposium on Superalloy 718 and Derivatives

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Hochwarmfeste Nickellegierungen

Bungardt¹,

Steinen²,

Schubert³

1972

Materialwissenschaft Werkst

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Legierungsaufbau und metallkundliche Grundlagen der hochwarmfesten Nickellegierungen werden erörtert und mit ihrem Festigkeitsverhalten in Zusammenhang gebracht. Die Zusammensetzung des Mischkristalls und der aushärtenden Phase γ′ (Ni3Al, Ti, Nb, Ta) sowie deren From, Anteil und Verteilung sind maßgebend für die Gefügestabilität und das Verhalten unter Zeitstandbeanspruchung. Einige aus der großen Zahl verfügbarer Nickellegierungen angeführte Beispiele kennzeichnen den Verwendungszweck und den von der Legierungszusammensetzung gegebenen bevorzugten Bereich der Anwendungstemperatur zwischen etwa 500 und 1000°C. die weitere Entwicklung ist auf eine Optimierung der chemischen Zusammensetzung und auf die Anwendung verbesserter oder neuer Herstellungsverfahren gerichtet.

show abstract

Correlation of gamma-gamma prime mismatch and strengthening in Ni/Fe-Ni base alloys containing aluminum and titanium as hardeners

Cited by 31 publications

References 2 publications

Influence of chromium on microstructure and etching behaviour of new Ni–Fe–Al based alloy

Influence of chromium on microstructure and etching behaviour of new Ni–Fe–Al based alloy

The Effect of Composition on the Gamma Prime Distribution of Ni‐Cr‐Al‐Nb Alloys

Hochwarmfeste Nickellegierungen

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