Ordering-mediated local nano-clustering results in unusually large Hall-Petch strengthening coefficients in high entropy alloys
نویسندگان
چکیده
This paper reports a dramatic increase in the grain boundary strengthening or Hall-Petch coefficient, K, by systematically investigating effect of Al addition on tensile yield strength CoFeN...
منابع مشابه
Local lattice distortion in high-entropy alloys
Hongquan Song,1 Fuyang Tian,1,* Qing-Miao Hu,2,† Levente Vitos,3,4,5 Yandong Wang,6 Jiang Shen,1 and Nanxian Chen1,7 1Institute for Applied Physics, University of Science and Technology Beijing, Beijing 100083, China 2Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China 3Applied Materials Physics, Department of Mater...
متن کاملHall-Petch Relationship: Use in Characterizing Properties of Aluminum and Aluminum Alloys*
The mechanical properties of aluminum are shown to be of special importance beginning from the early 20th century production of the material in single crystal and polycrystalline form. Experimental and theoretical researches of the time were concerned with particular influence of polycrystalline microstructure and the presence of crystal (grain) boundaries on both the material strength properti...
متن کاملSuperior hydrogen storage in high entropy alloys
Metal hydrides (MHx) provide a promising solution for the requirement to store large amounts of hydrogen in a future hydrogen-based energy system. This requires the design of alloys which allow for a very high H/M ratio. Transition metal hydrides typically have a maximum H/M ratio of 2 and higher ratios can only be obtained in alloys based on rare-earth elements. In this study we demonstrate, f...
متن کامل3D ChemiSTEMTM Tomography of Nano-scale Precipitates in High Entropy Alloys
Electron tomography is a three-dimensional technique well suited for characterizing fine-scale microstructural features on the order of 10-100 nm. Typically performed in a transmission electron microscope (TEM), it relies on successive image acquisition at multiple sample tilts. Images may be formed through various techniques including conventional and scanning transmission electron microscopy ...
متن کاملPseudo Hall-Petch strength reduction in polycrystalline graphene.
The fracture of polycrystalline graphene is explored by performing molecular dynamics simulations with realistic finite-grain-size models, emphasizing the role of grain boundary ends and junctions. The simulations reveal a ~50% or more strength reduction due to the presence of the network of boundaries between polygonal grains, with cracks preferentially starting at the junctions. With a larger...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Materials research letters
سال: 2021
ISSN: ['2166-3831']
DOI: https://doi.org/10.1080/21663831.2020.1871440