Abstract
To understand the fundamental deformation mechanisms of compositionally complex alloys, single crystals of a multi-component equiatomic FeNiCoCr alloy with face-center-cubic (FCC) structure were grown for mechanical studies. Similar to typical FCC pure metals, slip trace analyses indicate that dislocation slips take place on (1 1 1) planes along [110] directions. The critical resolved shear stress (CRSS) obeys the Schmid law at both 77 and 293 K, and tension-compression asymmetry is not observed. Although this material slips in a normal FCC manner both at 293 and 77 K, the strong temperature dependence of the CRSS is abnormal in comparison to the typical FCC metals.
| Original language | English |
|---|---|
| Article number | 10743 |
| Pages (from-to) | 108-112 |
| Number of pages | 5 |
| Journal | Scripta Materialia |
| Volume | 109 |
| DOIs | |
| State | Published - Dec 1 2015 |
Funding
This work was supported by the Department of Energy, Office of Sciences, Basic Energy Science, Materials Science and Engineering Division . The authors thank Dr. M. K. Miller in Oak Ridge National Laboratory for the help in APT conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility.
Keywords
- Compositionally complex alloys
- High entropy alloys
- Single crystal plasticity
- Slip trace analysis
- Temperature dependence
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