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Meeting TMS Specialty Congress 2026
Symposium 4th World Congress on High Entropy Alloys (HEA 2026)
Presentation Title Neutron Diffraction as a Technique for Detecting Chemical Short-Range Order in CrCoNi Alloy
Author(s) Vinícius Pereira Bacurau, Camilo Salvador, Guilherme Stumpf, Eric Mazzer, Angelo Andreolli, Caroline Stoco, Lewis Owen, Yifan Cao, Rodrigo Freitas, Francisco Coury
On-Site Speaker (Planned) Vinícius Pereira Bacurau
Abstract Scope The equiatomic CrCoNi alloy has been widely reported as one of the toughest alloys at cryogenic temperatures, exhibiting excellent mechanical properties associated with deformation mechanisms such as the TWIP and TRIP effects. However, not all phenomena that may influence its properties are fully understood. One phenomenon that has regained attention in recent years is chemical short-range order (CSRO), which is characterized by preferential bonding between different atoms over short distances without the formation of a new phase. The main difficulty in studying CSRO lies in its experimental detection, as only highly sensitive techniques can directly observe it. In this work, neutron diffraction was employed to investigate CrCoNi alloy samples subjected to different thermal aging conditions in order to detect the presence of CSRO. The diffraction results reveal a low-angle diffuse peak whose intensity increases with aging time, indicating the progressive development of chemical short-range order in the alloy.
Proceedings Inclusion? Undecided

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