A new single crystal high entropy alloy with excellent high-temperature tensile property

Abstract

A new single crystal high entropy alloy is developed and produced using Bridgman directionalsolidification and seed-crystal method. The microstructure exhibits the directional dendrite morphology and is mainly composed of the FCC matrix and the L1 2 ordered precipitates. Its hightemperature yield strengths are far higher than those of the first-generation single crystal superalloys, and close to those of the second-generation ones. The solid-solution strengthening effect from the high content of W and Mo, as well as the precipitation strengthening effect from the combined addition of Al, Ti, Ta, and Nb, should be responsible for the excellent high-temperature strength of the investigated alloy.

Flow structure of pressure transmission tube and its influence on unsteady pressure measuring results in compressible flow

“…The tube material may also affect the dynamic response characteristics. Materials with special mechanic and thermal properties, such as functionally graded materials [71][72][73][74] and high entropy alloys [75,76], can be assessed in the future.…”

Crack growth and fracture mechanics of CuCrFeNiCo high-entropy alloy during tension testing

“…Therefore, the SC CuCrFeNiCo HEA, the NC CuCrFeNiCo HEA and the TN CuCrFeNiCo HEA are selected to perform MD simulations in current study with the aim of evaluating the differences in mechanical properties between the CuCrFeNiCo HEA samples at the same simulation conditions. Besides, HEA materials with SC, NC and TN structural forms have also been widely fabricated and studied using both experimental and simulation methods in recent years [25][26][27][28]. For these indepth studies, molecular dynamics (MD) simulations [29,30] are an efficient, flexible, and consistent tool that provides insight into the respective underlying physical and atomic mechanisms behind the deformation process of the materials.…”