About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Thermomechanical Processing of a CrMnFeCoNi by Cold Rolling and Annealing |
Author(s) |
Caroline Nazaré Gonçalves, Gustavo Henrique Sousa, Eric Marchezini Mazzer |
On-Site Speaker (Planned) |
Caroline Nazaré Gonçalves |
Abstract Scope |
The study approachs the identification of suitable thermomechanical processing routes that allow an improvement of the mechanical properties in a CrMnFeCoNi HEA processed by spray forming. The alloy was submitted to cold rolling under differents reductions (30%, 50%, 90% and 140% of true strain) with and without subsequent annealing (temperatures ranging from 500 to 900 oC). Microstructural and mechanical characterizations were carried out in order to analyze the underlying deformation mechanisms such as dislocation mediated plasticity and twinning. It were observed difference between annealing and deformation twinning and their contributtion to deformation and hardening mechanisms.The results presented an alloy with excellent workability and exhibited a large work hardening capacity in cold rolling It is concluded that the main deformation and hardening mechanisms during cold work are associated with the nanotwinning deformation of this alloy, which is in agreement with the increase of 136% in the microhardness without subsequent annealing. |
Proceedings Inclusion? |
Undecided |