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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Recent Investigations and Developments of Titanium-containing High Entropy Alloys
Presentation Title Single-crystal mechanical properties of equiatomic and non-equiatomic high-entropy alloys
Author(s) Haruyuki Inui, Kyosuke Kishida
On-Site Speaker (Planned) Haruyuki Inui
Abstract Scope The plastic deformation behavior of single crystals of FCC equatomic and non-equiatomic high-entropy alloys of the Cr-Mn-Fe-Co-Ni system has been investigated in a temperature range of 10-1273 K both in tension and compression. Deformation occurs via slip of the {111}<110> system exclusively in the whole temperature range for all alloys investigated. The CRSS values increase with decreasing temperature, especially below room temperature, so that the concept of ‘stress equivalence’ is obeyed. This is a clear indication that the strength of these alloys should be described by a mechanism based on solid-solution hardening. The CRSS values at 10 K seems to be well scaled by the mean-square atomic displacement from the regular FCC lattice points (calculated based on density-functional theory). Deformation twinning occurs in later stages of deformation at low temperatures below room temperature in many of these alloys. The correlation between twinning stress and the stacking-fault energy will be discussed.
Proceedings Inclusion? Planned: None Selected
Keywords High-Entropy Alloys, Mechanical Properties, High-Temperature Materials


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