Tuning to more compressible phase in TiZrHfNb high entropy alloy by pressure
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China); Wuhan Univ. (China)
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China); Northeastern Univ., Boston, MA (United States)
- Peking Univ., Shenzhen (China)
- Univ. of Science and Technology Beijing (China)
- Univ. of Chicago, IL (United States)
In this work, the starting nominal Ti25Zr25Hf25Nb25 high entropy alloy (HEA) has two body centered cubic (BCC) phases with a volume percentage about 100:1, with the primary phase having a much larger bulk modulus (incompressible) than the uniform single-phase HEA. We found that these two phases merged into one single BCC phase at pressures beyond 36 GPa, whose bulk modulus dropped to that of the normal homogeneous HEA. After decompressing, the new phase can be sustained to ambient conditions. We note this abnormal pressure-induced softening was largely related to the lattice distortion evolution and interfacial energy during compression.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- National Natural Science Foundation of China (NSFC); China Postdoctoral Science Fund; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- Grant/Contract Number:
- 11804010; U1530402; 51527801; 2016M600909; FG02-94ER14466; AC02-06CH11357
- OSTI ID:
- 1598008
- Journal Information:
- Applied Physics Letters, Vol. 116, Issue 3; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Cited by: 4 works
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