Correlation between microstructure evolution and creep of alloy 263

• Published in: Materials characterization Vol. 156; p. 109847
• Main Authors: Chung, Hee-Jeong, Huh, Joo-Youl, Jung, Woo-Sang
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.10.2019
• Subjects: Alloy 263; Creep; Eta; Gamma prime; Alloy 263; Gamma prime; Eta; Creep
• ISSN: 1044-5803; 1873-4189
• DOI: 10.1016/j.matchar.2019.109847

This study discusses the temperature dependence of deformation mechanisms and microstructure evolution during creep. Alloy 263 was investigated for creep under various conditions of applied stress and temperature until fracture. The crept microstructure was analyzed using electron microscopy. The analysis shows the phase reaction of MC + γ → M23C6 + (γ′, η) in creep condition takes place. Moreover, the precipitation of η, which has slower precipitation kinetics than γ′, was promoted by creep. Additionally, the interaction between γ′ and dislocations changed from shearing to by-passing with the increase of temperature because critical shear stress of each deformation mechanisms is dependent on temperature. •Crept microstructure of Nimonic 263 is investigated.•The phase reaction of MC + γ → M23C6 + (γ′, η) in Nimonic 263 at creep condition is take place.•Dominant deformation mechanism depends on temperature.