Abstract
Various multi-principle element alloys exhibit superior mechanical properties across a wide range of temperatures including cryogenic temperatures. In most systems, the remarkable properties are attributed to deformation twinning (twinning induced plasticity). The recent VFeCoCrNi multi-principle element alloy displays a combined twinning induced plasticity effect, at room-temperature, and phase transformation at low deformation temperatures (transformation induced plasticity). This work considers single crystalline specimens of VFeCoCrNi loaded along the [111] direction. At room-temperature, slip dominates at low strains, below 22% plastic strain, and a delayed activation of twinning is observed. At 77 K, early activation of transformation, face-center cubic to body-center cubic having {111}FCC//{110}BCC and 〈110〉FCC//〈111〉BCC parallel relations, was revealed.
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