Peter K. Liaw
University of Tennessee
Ultimate tensile strengthAmorphous metalDeformation (engineering)Composite materialMetallurgyMaterials scienceStructural materialSuperalloyCondensed matter physicsAlloyHigh entropy alloysPhase (matter)Amorphous solidFracture mechanicsDuctilityNeutron diffractionPlasticityCrystallographyMicrostructureThermodynamics
1,128Publications
94H-index
33.5kCitations
Publications 1104
Newest
#1Wangying Yu (USST: University of Shanghai for Science and Technology)
#2Wei Li (USST: University of Shanghai for Science and Technology)H-Index: 16
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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Abstract The multi-component (AlCrTiZrMo)-Six-N high-entropy films with different silicon contents were deposited on the silicon substrate by magnetron sputtering. The influence of silicon contents on the structures and properties of the films was studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), electron probe microanalyzer (EPMA) and nanoindentation. The results show that the (AlCrTiZrMo)N film without sil...
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#1Nengbin Hua (Fujian University of Technology)H-Index: 15
#1Nengbin Hua (Fujian University of Technology)H-Index: 2
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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Abstract The microstructures, mechanical, corrosion, and wear behaviors of the TixZrNbTaMo (x = 0.5, 1, 1.5, and 2, molar ratio) high entropy alloys (HEAs) were studied. It was found that the Ti–Zr–Nb–Ta–Mo HEAs showed a dendrite structure with two body-centered-cubic (BCC) solid solution phases. The Ti0.5ZrNbTaMo HEA exhibited a high hardness of about 500 HV, high compressive strength approaching 2,600 MPa, and large plastic strain of over 30%. Furthermore, the highly-protective oxide films for...
6 CitationsSource
#1Di Xie (UT: University of Tennessee)H-Index: 2
#2Zongyang Lyu (UT: University of Tennessee)H-Index: 2
Last. Yanfei Gao (UT: University of Tennessee)H-Index: 38
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Abstract Unlike many Mg alloys that exhibit limited ductility, duplex Mg-Li alloys possess enhanced ductility but the underlying mechanisms are unclear. Using real-time in situ neutron diffraction measurements, we show that the underlying deformation modes in this duplex microstructure include an early yield of body-centered-cubic (BCC) β-Li phase and the later elevated hardening in this phase at large macroscopic plastic strain, and the sequential activation of basal and pyramidal slip systems ...
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Last. Gian SongH-Index: 16
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Single-phase solid-solution refractory high-entropy alloys (RHEAs) have been receiving significant attention due to their excellent mechanical properties and phase stability at elevated temperatures. Recently, many studies have been reported regarding the precipitation-enhanced alloy design strategy to further improve the mechanical properties of RHEAs at elevated temperatures. In this study, we attempted to develop precipitation-hardened light-weight RHEAs via addition of Ni or Co into Al0.8NbT...
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#1William Yi WangH-Index: 18
#2Yong ZhangH-Index: 112
Last. Peter K. LiawH-Index: 94
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#1Xiaolei Yan (Beihang University)H-Index: 1
#2Hui Guo (Beihang University)H-Index: 1
Last. Tao Zhang (Beihang University)H-Index: 4
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Abstract The effects of the Cr content on microstructure, corrosion behavior, and mechanical properties of the Al0.3CrxFeCoNi high-entropy alloys (HEAs) were studied. The Al0.3CrxFeCoNi alloys with x = 0–1.0 exhibited the single face-centered-cubic (FCC) structure, and the alloys with x = 1.5–2.0 consisted of the FCC and disordered body-centered-cubic (BCC)/ordered BCC (B2) structure. In the 3.5 mass% NaCl solution, the Al0.3CrxFeCoNi alloys are spontaneously passivated, and the pitting resistan...
1 CitationsSource
#1XueHui Yan (USTB: University of Science and Technology Beijing)
#2Peter K. Liaw (UT: University of Tennessee)H-Index: 94
Last. Yong Zhang (USTB: University of Science and Technology Beijing)H-Index: 112
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Order and disorder are important principles in materials science in which entropy is a measure of disorder in a system. For example, recently developed high-entropy alloys and amorphous alloys have drawn interest based on the ability to design their disorder to bring out different material characteristics. High-entropy alloys are controlled by chemical disorder, whereas amorphous alloys are governed by topological disorder. There is often a need to increase disorder or entropy in these materials...
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#1Qihong Fang (Hunan University)H-Index: 29
#2Jing Peng (Hunan University)
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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Abstract Due to the development and utilization of nuclear energy, there is an urgent need for metal materials that have stable mechanical properties under irradiation conditions. In recent years, high-entropy alloys (HEAs) have been widely concerned, and their excellent properties under extreme conditions have been explored, so that they are considered as candidate materials under nuclear fusion and fission conditions. However, modeling the irradiated hardening behaviour in HEA is still lacking...
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#1Jia Li (Hunan University)H-Index: 18
#1Jia Li (Hunan University)H-Index: 25
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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Abstract In medium/high entropy alloys, their mechanical properties are strongly dependent on the chemical-elemental composition. Thus, searching for optimum elemental composition remains a critical issue to maximize the mechanical performance. However, this issue solved by traditional optimization process via “trial and error” or experiences of domain experts is extremely difficult. Here we propose an approach based on high-throughput simulation combined machine learning to obtain medium entrop...
6 CitationsSource
#1Jamieson BrechtlH-Index: 12
#2Peter K. Liaw (UT: University of Tennessee)H-Index: 94
This chapter presents a literature review of the serrated flow phenomenon in high-entropy alloys (HEAs). The serrated flow is important as it can result in permanent macroscopic and microstructural changes in HEAs. The literature reveals several important findings regarding the effect of strain rate and test temperature on the serrated flow. Furthermore, this chapter explores the relationship among the composition, microstructure, testing condition, and serration behavior. Towards the end of the...