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1. Nanoprecipitate‐Strengthened High‐Entropy Alloys

   https://doi.org/10.1002/advs.202100870  

   Liu, Liyuan; Zhang, Yang; Han, Jihong; Wang, Xiyu; Jiang, Wenqing; Liu, Chain‐Tsuan; Zhang, Zhongwu; Liaw, Peter_K (October 2021, Advanced Science)

   Abstract Multicomponent high‐entropy alloys (HEAs) can be tuned to a simple phase with some unique alloy characteristics. HEAs with body‐centered‐cubic (BCC) or hexagonal‐close‐packed (HCP) structures are proven to possess high strength and hardness but low ductility. The faced‐centered‐cubic (FCC) HEAs present considerable ductility, excellent corrosion and radiation resistance. However, their strengths are relatively low. Therefore, the strategy of strengthening the ductile FCC matrix phase is usually adopted to design HEAs with excellent performance. Among various strengthening methods, precipitation strengthening plays a dazzling role since the characteristics of multiple principal elements and slow diffusion effect of elements in HEAs provide a chance to form fine and stable nanoscale precipitates, pushing the strengths of the alloys to new high levels. This paper summarizes and review the recent progress in nanoprecipitate‐strengthened HEAs and their strengthening mechanisms. The alloy‐design strategies and control of the nanoscale precipitates in HEAs are highlighted. The future works on the related aspects are outlined. 

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2. Mechanical behavior of high-entropy alloys

   https://doi.org/10.1016/j.pmatsci.2021.100777  

   Li, Weidong; Xie, Di; Li, Dongyue; Zhang, Yong; Gao, Yanfei; Liaw, Peter K. (May 2021, Progress in Materials Science)

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3. Sudoku-Inspired High-Shannon-Entropy Alloys

   https://doi.org/10.1016/j.actamat.2021.117556  

   Zhuang, Houlong (January 2022, Acta materialia)
4. Temperature-Dependent Configurational Entropy Calculations for Refractory High-Entropy Alloys

   https://doi.org/10.1007/s11669-021-00879-9  

   Nataraj, Chiraag M; van de Walle, Axel; Samanta, Amit (April 2021, Journal of Phase Equilibria and Diffusion)

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   The cluster expansion formalism for alloys is used to construct surrogate models for three refractory high-entropy alloys (NbTiVZr, HfNbTaTiZr, and AlHfNbTaTiZr). These cluster expansion models are then used along with Monte Carlo methods and thermodynamic integration to calculate the configurational entropy of these refractory high-entropy alloys as a function of temperature. Many solid solution alloy design guidelines are based on the ideal entropy of mixing, which increases monotonically with N, the number of elements in the alloy. However, our results show that at low temperatures, the configurational entropy of these materials is largely independent of N, and the assumption described above only holds in the high-temperature limit. This suggests that alloy design guidelines based on the ideal entropy of mixing require further examination. 

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5. Machine learning strategies for high-entropy alloys

   https://doi.org/10.1063/5.0030367  

   Rickman, J. M.; Balasubramanian, G.; Marvel, C. J.; Chan, H. M.; Burton, M.-T. (December 2020, Journal of Applied Physics)

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