Zongyang Lyu
University of Tennessee
Yield (engineering)FabricationDeformation (engineering)Precipitation hardeningDislocationComposite materialHardening (metallurgy)MetallurgyMaterials scienceStructural materialDeformation mechanismWork hardeningMagnesium alloyAlloyHigh entropy alloysMetallic materialsPhase stabilityFabrication methodsCritical resolved shear stressTexture (crystalline)DuctilityEngineering physicsCrystal twinningPlasticityMicrostructureToughness
4Publications
2H-index
45Citations
Publications 4
Newest
#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
view all 8 authors...
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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#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
view all 9 authors...
Abstract This work investigates the microscopic deformation mechanisms of an extruded, precipitation-strengthened AZ80 magnesium (Mg) alloy subjected to strain-controlled low-cycle fatigue using in situ neutron diffraction measurements. Results demonstrate that the plastic deformation during cyclic loading is dominated by the alternating {10.2} extension twinning and detwinning mechanisms. The observed deformation mode is strongly texture and precipitate dependent. For the initial texture, the t...
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#1Zongyang Lyu (UT: University of Tennessee)H-Index: 2
#2Chanho Lee (UT: University of Tennessee)H-Index: 12
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 4
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High-entropy alloys (HEAs) have become a research hotspot in recent years. The nature of the multi-principal elements, high mixing entropy, and mutual interactions between elements render this novel material outstanding mechanical and functional properties, in which most research efforts are focused on mechanical properties. There are many aspects that can influence the mechanical behavior, such as constituent elements and fabrication methods. This paper will mainly summarize and discuss the eff...
26 CitationsSource
#1Zongyang Lyu (UT: University of Tennessee)H-Index: 2
#2Xuesong Fan (UT: University of Tennessee)H-Index: 4
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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The basic principle of high-entropy alloys (HEAs) is that high mixing entropies of solid-solution phases enhance the phase stability, which renders us a new strategy on alloy design. The current research of HEAs mostly emphasizes mechanical behavior at room and higher temperatures. Relatively fewer papers are focused on low-temperature behaviors, below room temperature. However, based on the published papers, we can find that the low-temperature properties of HEAs are generally excellent. The gr...
25 CitationsSource