The potential for achieving superplasticity in high-entropy alloys processed by severe plastic deformation

7th International Conference on Nanomaterials by Severe Plastic Deformation

Shahmir, Hamed^1,2 ; Kawasaki, Megumi^3,4 ; Langdon, Terence G.^1,4

Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton

SO17 1BJ, United Kingdom^1

School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran, Iran^2

Division of Materials Science and Engineering, Hanyang University, Seoul

04763, Korea, Republic of^3

Departments of Aerospace and Mechanical Engineering and Materials Science, University of Southern California, Los Angeles

CA

90089-1453, United States^4

关键词: High entropy alloys;    High temperature mechanical properties;    Limited information;    Nano meter range;    Severe plastic deformations;    Solid solution strengthening;    Superplastic alloys;    Superplastic elongation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/194/1/012040/pdf
DOI  :  10.1088/1757-899X/194/1/012040

来源: IOP

【 摘 要 】

High-entropy alloys (HEAs) are now becoming important because they offer unique combinations of solid solution strengthening and good ductility at low temperatures. Only limited information is at present available on the high temperature mechanical properties of these materials. Nevertheless, it is evident that, as in conventional metallic alloys, processing through the application of severe plastic deformation can reduce the grain size to the nanometer range and this provides a potential for achieving good superplastic elongations. The superplastic data available to date are examined in this review and a comparison is made between the behaviour of HEAs and conventional superplastic alloys.