Temperature effects on the transition from Lomer-Cottrell locks to deformation twinning in a Ni-Co-based superalloy. (December 2016)

• Record Type: Journal Article
• Authors: Qi, Dongqing; Fu, Baidong; Du, Kui; Yao, Tingting; Cui, Chuanyong; Zhang, Jianxin; Ye, Hengqiang
• Is Part Of: Scripta materialia. Volume 125(2016)
• Page Start: 24
• Page End: 28
• Publication Date: 2016-12
• Subjects: Superalloy -- Microstructure -- Lomer-Cottrell lock -- Twinning; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.07.033
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Deformation mechanisms of a Ni-Co-based superalloy at various temperatures were investigated with aberration corrected and conventional transmission electron microscopes. When deformed at intermediate temperature, Lomer-Cottrell locks were formed in primary γ′ precipitates in this superalloy; at high temperatures, however, microtwins become prominent. The transition from Lomer-Cottrell locks to microtwins with temperature increase is discussed, in particular, on the reordering process in the ordered γ′ precipitates during the deformation twinning. Graphical abstract: