Dynamic Strain Aging Behavior of Cobalt-Based Haynes188 Superalloy
Küçük Resim Yok
Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Superalloys have been developed to meet the need for materials that will serve at high operating temperatures without losing their properties. The three major classes of superalloys are nickel-, iron-, and cobalt-based alloys. Cobalt-based superalloys are used between 650 and 1100 degrees C temperatures due to their wear, creep, oxidation, heat, and corrosion resistance. Haynes 188, an essential family member, is mainly used in gas turbine engines such as combustion chambers, air transfer ducts, fixed blades, exhaust nozzles, and flame holder components. Strengthening is achieved by solid solution or carbide and intermetallic formed in their structures. None of the cobalt-based superalloys are fully solid solution alloys. Almost all contain carbide or intermetallic compounds. This can lead to dynamic strain aging at different service temperatures in the alloy under load, resulting in a reduction in ductility. Considering the temperatures in service conditions, the dynamic strain ageing behavior of Haynes 188 alloy at 25, 250, 400, 550, 700, 850, and 1000 degrees C was thoroughly examined for the first time in this study. The unsteady yielding with different type's serration verified that the dynamic strain ageing is formed in Haynes 188 alloy. Therefore, ductility of alloy decreased in the temperature range of 250-700 degrees C, particularly at 550 degrees C.
Açıklama
Anahtar Kelimeler
cobalt-based superalloy, dynamic strain ageing, haynes 188
Kaynak
Journal of Materials Engineering and Performance
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
33
Sayı
5
