Temperature dependent load partitioning and slip mode transition in a eutectic AlCoCrFeNi2.1 high entropy alloy
Artikel i vetenskaplig tidskrift, 2021

Eutectic high entropy alloys are gaining increasing attention due to their excellent castability and combination of strength and ductility in the as-cast state. However, the detailed behavior of the nano-scale lamellar microstructure during deformation, and in particular the interaction between the phases, is not well understood. Here we use in-situ neutron diffraction during tensile testing over a wide temperature range (77–673 K) to obtain new insights into the temperature dependent mechanical interactions between and within phases during initial plastic deformation of an AlCoCrFeNi eutectic high entropy alloy. The load was transferred from the L1 to the B2 phase during the yielding process, and the changing load distribution within the L1 phase with increasing temperature strongly suggests that <110>{001} cube slip is activated at room temperature and above. This points towards alloying design for delayed octahedral-to-cube slip transition as a possible strategy for increasing the high temperature strength of material. 2.1 2 2

Load distribution

Cube slip

Elastic lattice strains

Eutectic high entropy alloy

Neutron diffraction

Författare

Nitesh Raj Jaladurgam

Chalmers, Fysik, Mikrostrukturfysik

Adrianna Lozinko

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Sheng Guo

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Tung Lik Lee

STFC Rutherford Appleton Laboratory

Magnus Hörnqvist Colliander

Chalmers, Fysik, Mikrostrukturfysik

Materialia

25891529 (eISSN)

Vol. 17 101118

Ämneskategorier

Keramteknik

Annan materialteknik

Metallurgi och metalliska material

DOI

10.1016/j.mtla.2021.101118

Mer information

Senast uppdaterat

2021-06-17