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- Title
Slip and Twinning in the [ $$ \overline{\mathbf{1}} $$ 49]-Oriented Single Crystals of a High-Entropy Alloy.
- Authors
Kireeva, I.; Chumlyakov, Yu.; Pobedennaya, Z.; Platonova, Yu.; Kuksgauzen, I.; Kuksgauzen, D.; Poklonov, V.; Karaman, I.; Sehitoglu, H.
- Abstract
Using [ $$ \overline{1} $$ 49] - oriented single crystals of an FCC FeNiMnCrCo (at.%) high-entropy alloy subjected to tensile deformation, the temperature dependence of critical resolved shear stresses τ(T) and the deformation mechanism of slip and twinning are investigated in the early stages of deformation at ε ≤ 5% within the temperature interval T = 77-573 K. It is shown that τ increases with decreasing the testing temperature and the τ(T) temperature dependence is controlled by the slip of perfect dislocations a/2<110>. The early deformation stages ε ≤ 5% are associated with the development of planar slip by pileups of perfect dislocations a/2<110>, stacking faults and mechanical twins, which is observed in the temperature interval from 77 to 423 K. A comparison of the temperature dependence τ(T) and the development of mechanical twinning is performed between the [ $$ \overline{1} $$ 49] -oriented single crystals of the FeNiMnCrCo high-entropy alloy, the single crystals of the austenitic stainless steel, Fe - 18% Cr - 12% Ni - 2Mo (wt.%) without nitrogen atoms (Steel 316) and Hadfield steel, Fe - 13% Mn - (1-1.3)% C (wt.%).
- Subjects
HEAT resistant alloys; ENTROPY; TWINNING (Crystallography); SINGLE crystals; CRYSTAL orientation; DISLOCATIONS in crystals
- Publication
Russian Physics Journal, 2016, Vol 59, Issue 8, p1242
- ISSN
1064-8887
- Publication type
Article
- DOI
10.1007/s11182-016-0898-1