Ultrafine-Grained Two-Phase High-Entropy Alloy Microstructures Obtained via Recrystallization: Mechanical Properties

Catalytic characteristics of titanium‐( IV )‐isopropoxide ( TTIP ) on de/re‐hydrogenation of wet ball‐milled MgH 2 / Mg

“…16,50,[52][53][54][55] This approach is significantly less expensive, with a high yield for synthesizing materials in the nano range than other approaches like chemical cold rolling and annealing. 56,57 The yield of materials depends on the milling parameters like milling intensity (rpm), the ball to material ratio, milling time, and the process control agent (medium: liquid or gas). Process control agent is an imported parameter for the ballmilling technique because it prevents heat-trapping and environmental contamination during milling.…”

“…However, high‐energy ball‐milling is one of the most commonly used techniques to reduce the particle size of MgH 2 16,50,52‐55 . This approach is significantly less expensive, with a high yield for synthesizing materials in the nano range than other approaches like chemical cold rolling and annealing 56,57 . The yield of materials depends on the milling parameters like milling intensity (rpm), the ball to material ratio, milling time, and the process control agent (medium: liquid or gas).…”

Thermal–Mechanical Processing and Strengthen in AlxCoCrFeNi High-Entropy Alloys

“…The optimization of the mechanical properties of high-entropy alloys is thus challenging. Recently, studies have focused on overcoming the strength-ductility trade off, by introducing high-density nano-twins in the grains (Lu, 2016;Schneider et al, 2020), as processing fine grains combined with nanoscale precipitates even distribution within the grains (Zhao et al, 2020b;Guillot et al, 2020;Yu et al, 2020), controlling the lattice misfit between intermetallic nanoparticles and matrix (Miracle, 2015;He et al, 2016a;Zhang et al, 2019) and producing materials with a heterogeneous structure (Sun et al, 2018;Wu et al, 2019;Du et al, 2020). The successful preparation of eutectic high-entropy alloy (EHEA) provided a new way to optimize the phase structure of HEAs by combining the ductile phase (e.g., fcc solid-solution phase) with the hard phase (e.g., bcc solid-solution phase or intermetallics) (Lu et al, 2014;Tan et al, 2019).…”