Refined microstructure and dispersed precipitates in a gradient rolled AZ91 alloy under pulsed current

An accelerated aging assisted by electric current in a Fe-Mn-Al-C low-density steel

“…Compared with TA treatment, the atomic diffusion flux generated by the nonthermal effect of current causes the κ-carbides to grow rapidly after precipitation. 0 However, the size of κ-carbides tends to decrease beyond some aging time, which was also observed by Xu et al [43] . The reason is analyzed as follows: The precipitation of κ-carbides introduces a surrounding elastic strain field due to the lattice mismatch with the matrix [44] .…”

Solid-State Synthesis of SiC Particle-Reinforced AZ91D Composites: Microstructure and Reinforcement Mechanisms

“…The AZ91D alloy is currently the most widely used cast magnesium alloy [26]; it has a finite slip system with a hexagonal closed-packed (HCP) structure [27][28][29], which leads to poor formability [30] and low strength [31,32]. When evaluating the feasibility of solid-state recycling of AZ91D alloy chips, the key engineering consideration is to ensure that the recycled material has excellent mechanical properties after extrusion.…”

Microstructure and mechanical properties of Co-28Cr-6Mo-0.22C investment castings by current solution treatment

“…Consequently, the exploration of fast solution treatment methods is imperative for enhancing production efficiency. Recent literatures suggest that current heat treatment methods can swiftly regulate microstructure and improve mechanical properties at lower temperatures, owing to non-thermal effects such as electron wind [19,20] and electromigration [21,22] . The current, by reducing the diffusion activation energy of elements and augmenting diffusion rates, enhances heat treatment efficiency [23][24][25] .…”