TY  - JOUR
AU  - Chandran, Anju
AU  - Ganesan, Hariprasath
AU  - Cyron, Christian J.
TI  - Studying the effects of Nb on high-temperature deformation in TiAl alloys using atomistic simulations
JO  - Materials and design
VL  - 237
SN  - 0264-1275
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2024-00476
SP  - 112596 -
PY  - 2024
AB  - Intermetallic γ(TiAl)-based alloys find their application as high-temperature materials for aero engine and automotive components. Microstructure optimization and microalloying play key roles in optimizing these alloys. Several pioneering experimental works showed improved mechanical properties of γ(TiAl)-based alloys containing Niobium (Nb). Despite Nb being a key alloying element, its contribution remains debated, if not least understood, due to the TiAl microstructure's complexity with hierarchical interfaces. This work examines the effects of Nb on the high-temperature deformation behavior of TiAl alloys using atomistic simulations. These revealed that Nb alloying retarded the stress-induced phase transformation of γ → , favoring a refined microstructure with the dislocation sources from microstructure boundaries and interfaces at high temperature and improving thus the ductility. Our microstructure-informed atomistic models reveal a comprehensive picture of the underlying nanomechanical events.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001165848000001
DO  - DOI:10.1016/j.matdes.2023.112596
UR  - https://juser.fz-juelich.de/record/1021016
ER  -