Efficient Coarse-Grained Superplasticity of a Gigapascal Lightweight Refractory Medium Entropy Alloy.

Superplastic metals that exhibit exceptional ductility (>300%) are appealing for use in high-quality engineering components with complex shapes. However, the wide application of most superplastic alloys has been constrained due to their poor strength, the relatively long superplastic deformation period, and the complex and high-cost grain refinement processes. Here these issues are addressed by the coarse-grained superplasticity of high-strength lightweight medium entropy alloy (Ti V Zr Nb Mo , at.

Frictional Wear and Corrosion Behavior of AlCoCrFeNi High-Entropy Alloy Coatings Synthesized by Atmospheric Plasma Spraying.

High-entropy alloy coatings (HEAC) exhibit good frictional wear and corrosion resistances, which are of importance for structure materials. In this study, the microstructure, surface morphology, hardness, frictional wear and corrosion resistance of an AlCoCrFeNi high-entropy alloy coating synthesized by atmospheric plasma spraying (APS) were investigated. The frictional wear and corrosion resistance of the coating are simultaneously improved with an increase of the power of APS.

Effect of Fe Addition on Microstructure and Mechanical Properties of As-cast TiNi Alloy.

Effect of Fe addition on microstructure and mechanical properties of as-cast TiNi alloy were investigated. The experimental results shows the microstructures of TiNiFe and TiNiFe alloys are mainly composed of TiNi matrix phase (body-centered cubic, BCC), TiNi and NiTi phases; the microstructure of TiNiFe alloy is mainly composed of BCC TiNi, TiNi, NiTi, and NiTi phases; the microstructure of the TiNiFe alloy is mainly composed of TiNi, TiNi and NiTi phases. The NiTi nanocrystalline precipitates at the adjacent position of NiTi phase.

Novel Ultralight-Weight Complex Concentrated Alloys with High Strength.

To explore a novel high strength and low modulus ultralight-weight complex concentrated alloys (ULW-CCAs), a series of light alloys are designed and explored based on some low-density and low modulus elements, such as Al, Li, Mg, Ca, Si, and Y. An AlLiMgSiCa₅Y (at %) CCA with a high specific strength of 327 KPa·m is successfully developed. After adjusting the composition, the AlLiMgCa₁Si₁ CCA with the good compressive plasticity is successfully developed.