Peter K. Liaw
University of Tennessee
Ultimate tensile strengthAmorphous metalDeformation (engineering)Composite materialMetallurgyMaterials scienceStructural materialSuperalloyCondensed matter physicsAlloyHigh entropy alloysPhase (matter)Amorphous solidFracture mechanicsDuctilityNeutron diffractionPlasticityCrystallographyMicrostructureThermodynamics
Publications 1109
#1Yunjong Jung (KNU: Kongju National University)
#2Kangjin Lee (KNU: Kongju National University)
Last. Gian Song (KNU: Kongju National University)H-Index: 16
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Abstract null null Refractory high-entropy alloys (RHEAs) show a great potential as structural materials due to their remarkable properties, such as high strength and thermal stability. Despite these advantages, the RHEAs still suffer from the limited ductility at room temperature. To overcome the strength-ductility trade-off, the new RHEA design strategy, transformation-induced plasticity (TRIP) HEAs, have been developed by applying metastability-engineering approach. With the newly developed R...
#1Abdullah Al Hasan (UT: University of Tennessee)H-Index: 2
#2Jiaqi Wang (UT: University of Tennessee)H-Index: 7
Last. Nicholas P. Butch (UMD: University of Maryland, College Park)H-Index: 51
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Abstract null null Introducing a non-regular distribution in the mass and bonding by including distinctly different elements can reduce the phonon transport even within structurally well-ordered materials. These distributions are a quality of all high-entropy alloys (HEAs), however the inclusion of aluminum in AlxCoCrFeNi is particularly impactful due to the large mismatch in atomic mass with other components. The resultant low phonon conductivity is a requirement for high thermoelectric perform...
#1Linxia Bi (DUT: Dalian University of Technology)H-Index: 2
#2Xiaona Li (DUT: Dalian University of Technology)H-Index: 16
Last. Chuang Dong (DUT: Dalian University of Technology)H-Index: 54
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Abstract null null A local structure determines the properties in disordered solid solutions with simple crystal structure. Introducing a weak enthalpy-interaction-element will change the local structure evolution of refractory high-entropy alloy films, thereby bringing effects for the properties. Herein series of (NbMoTaW)100-xVx (x = 0 ∼ 30.5, at%) thin films were prepared by radio frequency magnetron sputtering, and systematic investigations of the films are carried out through combining the ...
#1Wei Yang (Beihang University)H-Index: 5
#2Ying LiuH-Index: 17
Last. Tao Zhang (Beihang University)H-Index: 4
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Abstract null null The Ni-free Ti-based bulk metallic glasses (BMGs) with high glass-forming ability (GFA) can be synthesized in the (Ti, Cu, Zr)92.5Fe2.5Sn2Si1Ag2 alloy system over a wide composition range by copper-mold casting. Especially, the Ti48Cu37Zr7.5Fe2.5Sn2Si1Ag2 glassy alloy can form the BMG rod with a diameter up to 6 mm and showed a high compressive strength of ~ 2.05 GPa, elastic modulus of ~ 100 GPa, and microhardness of ~ 571 Hv. The Ti-based BMGs presented good bio-corrosion re...
#1Mingliang WangH-Index: 2
#2Yiping LuH-Index: 30
Last. Peter K. LiawH-Index: 94
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#1Peijian ShiH-Index: 2
#2Li Yi (SHU: Shanghai University)H-Index: 1
Last. Yunbo ZhongH-Index: 20
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Abstract Over recent years, eutectic high-entropy alloys (EHEAs) have intrigued substantial research enthusiasms due to their good castability as well as balanced strength–ductility synergy. In this study, a bulk cast Al19.25Co18.86Fe18.36Ni43.53 EHEA is developed with fine in-situ lamellar eutectics. The eutectics comprise alternating ordered face-centered-cubic (L12) and ordered body-centered-cubic (B2) phases with semi-coherent interfaces. The resulting microstructure resembles that of most r...
#1Chunyan Li (Lanzhou University of Technology)H-Index: 3
#2Yu Lu (Lanzhou University of Technology)
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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Abstract null null Microstructures and properties of Fe1.25CoNi1.25CrxAl0.25 (x=0.5, 0.75, 1) high-entropy alloys (HEAs) fabricated by copper mold suction casting were studied in this paper. The crystal structure of the alloy is composed of single-phase FCC solid solution, and the crystal structure does not change with the change of Cr content. The yield strength of as-cast alloys is below 200 MPa, and the elongation is above 50%. After cold-rolling and annealing, the strength and hardness of th...
#1Fanchao Meng (Yantai University)H-Index: 1
#1Fanchao Meng (Yantai University)H-Index: 16
Last. Zhu Lilong (CSU: Central South University)H-Index: 1
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Abstract null null It is often assumed that atoms are hard spheres in the estimation of local lattice distortion (LLD) in high-entropy alloys (HEAs). However, our study demonstrates that the hard sphere model misses the key effect, charge transfer among atoms with different electronegativities, in the understanding of the severely distorted local structure in the body-centered cubic (BCC) HfNbTiZr HEA. Through the characterization and simulations of the local structure of the HfNbTiZr HEA, we fo...
#1Jing Peng (Hunan University)H-Index: 1
#2Li Li (Hunan University)H-Index: 7
Last. Feng Liu (CSU: Central South University)H-Index: 134
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Abstract null null Heterostructured high-entropy alloys (HEAs) exhibit a good combination of strength and ductility. However, the deformation mechanisms and related mechanical properties of the heterogeneous nanostructured body-centred cubic (BCC) HEAs remain largely unrevealed. Here, we report the effect of the strain rate on the mechanical properties and microstructural evolution in the heterostructured Al3CoCrCuFeNi HEA with the gradient grain size ranging from 9 nm at the surface to 45 nm in...
#1Tingting Zuo (USTB: University of Science and Technology Beijing)H-Index: 9
#2Yongqiang Cheng (ORNL: Oak Ridge National Laboratory)H-Index: 50
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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