Excellent Strength–Impact Toughness Combination of Heterostructured Metastable Fe-Rich Medium-Entropy Alloy
Dmitrii Panov, Ruslan Chernichenko, Stanislav Naumov, Egor Kudryavtsev, Alexey Pertcev, Nikita Stepanov, Sergey Zherebtsov, Gennady Salishchev
TL;DR
A heterostructured Fe-rich medium-entropy alloy shows excellent strength and impact toughness at both room and cryogenic temperatures.
Contribution
A novel heterostructured alloy design achieves superior mechanical performance through cold rotary swaging and post-deformation annealing.
Findings
CRS and PDA created a heterogeneous microstructure with twinned γ-matrix and ultrafine grains.
The alloy showed excellent σm-KCV combination between −90 °C and +20 °C.
Cryogenic testing revealed inflections in impact curves, increasing crack propagation energy.
Abstract
The effect of a heterogeneous structure obtained via cold rotary swaging (CRS) and post-deformation annealing (PDA) on the dynamic mechanical properties of a non-equiatomic 49.5Fe-30Mn-10Co-10Cr-0.5C (at.%) medium-entropy alloy at room and cryogenic temperatures was studied. CRS to a reduction of 92% and subsequent PDA at 500–600 °C developed a heterogeneous structure consisting of a twinned γ-matrix and dislocation-free γ-grains in the rod core and an ultrafine-grained microstructure of γ-phase at the rod edge. Therefore, the maximum stress (σm) value increased. Charpy V-notch impact toughness (KCV) decreased after CRS to a reduction of 18% and stabilized after further straining. However, the contribution of the crack initiation energy consumption (KCVi) increased, while the crack propagation energy consumption (KCVP) decreased. PDA resulted in increases in KCVi and KCVP. A…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsHigh Entropy Alloys Studies · High-Temperature Coating Behaviors · High Temperature Alloys and Creep