Application of the cobalt based superalloy Haynes Alloy 25 (L605) in the fabrication of future radioisotope power systems

Kramer, Daniel P.; McDougal, J.R.; Ruhkamp, Joseph D.; McNeil, Dennis C.; Koehler, F. A.; Booher, Robert A.; Howell, Edwin I.

doi:10.1063/1.54734

Cited by 3 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The Haynes 25 superalloy combines cobalt, nickel, chromium, and tungsten elements. The chemical composition of the Haynes 25 superalloy, provided by the manufacturer, is 10% Ni, 20% Cr, 15% W, 3% Fe, 1.5% Mn, 0.4% Si, and 0.1% C, and the remainder is Co [23].…”

Section: Methodsmentioning

confidence: 99%

A Comparative Study on Characterization and High-Temperature Wear Behaviors of Thermochemical Coatings Applied to Cobalt-Based Haynes 25 Superalloys

Günen

Ergin

2023

Coatings

View full text Add to dashboard Cite

This study investigated the characteristic properties of aluminizing, boronizing, and boro-aluminizing coatings grown on Haynes 25 superalloys and their effects on the high-temperature wear behavior. The coating processes were conducted in a controlled atmosphere at 950 °C for 3 h. Characterization studies were performed using scanning electron microscopy, energy-dispersive spectroscopy, X-ray diffraction analysis, nanoindentation testing, and high-temperature wear tests. It was determined that the thickness values of aluminide, boride, and boride–aluminide coatings were 140 ± 1.50 µm, 37.58 ± 2.85 µm, and 14.73 ± 1.71 µm, and their hardness values were 12.23 ± 0.9 GPa, 26.34 ± 2.33 GPa, and 23.46 ± 1.29 GPa, respectively. The hardness of the coatings resulted in reduced wear volume losses both at room temperature and at 500 °C. While the best wear resistance was obtained in the boronized sample at room temperature due to its high hardness, the best wear resistance at 500 °C was obtained in the boro-aluminized sample with the oxidation–reduction effect of Al content and the lubricating effect of B content in the boro-aluminide coating. This indicates that the presence of aluminum in boride layers improves the high-temperature wear resistance of boride coatings. The coated samples underwent abrasive wear at room temperature, whereas at 500 °C, the wear mechanism shifted to an oxidative-assisted adhesive wear mechanism.

show abstract

Section: Methodsmentioning

confidence: 99%

A Comparative Study on Characterization and High-Temperature Wear Behaviors of Thermochemical Coatings Applied to Cobalt-Based Haynes 25 Superalloys

Günen

Ergin

2023

Coatings

View full text Add to dashboard Cite

show abstract

“…Çalışmada nükleer reaktörler, havacılık ve uzay sanayisi, gaz türbin motorları gibi yüksek sıcaklık uygulamalarında yaygın olarak kullanılabilen ağırlıkça %51 Co, %20 Cr, %15 W, %10 Ni, %3 Fe, %1,5 Mn, %0,4 Si, % 0,1 C ve % kalan diğer elementlerden oluşmuş [21] Haynes 25 kobalt esaslı süper alaşımı kullanılmıştır.…”

Section: Malzemeunclassified

Boronizing of Cobalt Based Haynes 25/L-605 Superalloy

GİRİŞKEN¹,

ÇAM²

2022

JCHAR

View full text Add to dashboard Cite

Bu çalışmada, kobalt esaslı Haynes 25 süper alaşımına 900℃'de 2 saat, 900℃'de 4 saat ve 1000℃'de 4 saat süre ile %90 B4C + %10 NaBF4 tozları kullanılarak kutu borlama yöntemi ile borlama işlemi uygulanmıştır. Borlama sonrası numunelerin yüzeyinde oluşturulan borür tabakalarının karakterizasyonu taramalı elektron mikroskobu (SEM), X-ışını difraktometresi (XRD) ve mikrosertlik testleri ile gerçekleştirilmiştir. XRD analizi sonucunda yüzeyde oluşan borür tabakalarında baskın fazın alaşım içeriğine ve difüze bor elementine bağlı olarak CoB fazı olduğu tespit edilmiştir. Ayrıca yapıda düşük miktarlarda (CoFe)B2, CrB ve W3CoB3 fazlarının da bulunduğu gözlenmiştir. Borlama sıcaklık ve süresindeki değişimlere bağlı olarak kaplama kalınlığının yanı sıra sertlik değerlerinde artışlar olmuştur. Kullanılan yüksek konsantrasyonlu borlama tozu sayesinde literatüre göre daha kalın borür tabakaları elde edilmiştir.

show abstract

Joining of niobium-1% zirconium to incoloy 909 for possible application in a refractory AMTEC cell wall

Kramer¹,

McDougal²,

Kwiatkowski³

et al. 1999

AIP Conference Proceedings

View full text Add to dashboard Cite

Application of the cobalt based superalloy Haynes Alloy 25 (L605) in the fabrication of future radioisotope power systems

Cited by 3 publications

References 4 publications

A Comparative Study on Characterization and High-Temperature Wear Behaviors of Thermochemical Coatings Applied to Cobalt-Based Haynes 25 Superalloys

A Comparative Study on Characterization and High-Temperature Wear Behaviors of Thermochemical Coatings Applied to Cobalt-Based Haynes 25 Superalloys

Boronizing of Cobalt Based Haynes 25/L-605 Superalloy

Joining of niobium-1% zirconium to incoloy 909 for possible application in a refractory AMTEC cell wall

Contact Info

Product

Resources

About