Weidong Li
University of Tennessee
Amorphous metalFatigue limitWork (thermodynamics)Finite element methodBrittlenessDeformation (engineering)Strain rateCreepComposite materialMetallurgyMaterials scienceStructural materialDeformation mechanismSerrationShear bandAlloyHigh entropy alloysSofteningFracture (geology)NanoindentationAmorphous solidPlasticityMicrostructureStress (mechanics)Shear (geology)Thermodynamics
31Publications
16H-index
686Citations
Publications 29
Newest
#1Shuying Chen (Yantai University)H-Index: 1
#2Weidong Li (UT: University of Tennessee)H-Index: 16
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
view all 11 authors...
Abstract Plastic instability manifested as the serrated flow on stress-strain curves of metal alloys is generally detrimental to their processing and manufacturing. The flow serration in the HfNbTaTiZr alloy is reported in the present work and its dependence on temperatures (573-823K) and strain rates (5 × 10−5 s−1-1 × 10−3 s−1) is investigated with experiments. The notable transition of the onset strain of the serrated flow from a declining (normal behavior) to rising (inverse behavior) trend w...
Source
#1Fuyu Dong (SUT: Shenyang University of Technology)H-Index: 6
#2Yuexin Chu (SUT: Shenyang University of Technology)
Last. Robert O. Ritchie (University of California, Berkeley)H-Index: 132
view all 0 authors...
Abstract null null This work intends to manipulate the internal flow units in Zr55Cu30Ni5Al10 bulk-metallic glasses (BMGs) through plasma-assisted hydrogenation to generate a positive microalloying effect on plasticity. Based on the cooperative shear model theory, serration-flow statistics during nanoindentation loading and creep tests during the holding stage were used to analyze the influence of hydrogen on the behavior of flow units in BMGs. Experimental observations showed that the hydrogen ...
Source
#1Weidong Li (UT: University of Tennessee)H-Index: 16
#2Di Xie (UT: University of Tennessee)H-Index: 2
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
view all 6 authors...
Abstract Research in the field of high-entropy alloys has been surging since the 2010s. As widely acknowledged, research interests in this field are largely sparked by the enormous possibilities in compositions, microstructures, and properties. In the first decade of extensive investigations, while many avenues of research in this vibrant field are being continuously opened, a considerable portion of endeavors is directed toward two very fundamentally important aspects. One is the exploration of...
2 CitationsSource
Abstract The Ti–48Al–2Cr alloy was subjected to the plasma-hydrogenation treatment. Then the alloy containing minor hydrogen was prepared (0.058 wt percent, wt.%). Hot-compression experiments were carried out at temperatures ranging from 1000 to 1,150 °C and strain rates ranging from 1 to 0.001 s−1. The results show that the peak stress after the plasma-hydrogenation treatment is lower than that of the unhydrogenated one. At 1100 °C and the strain rate of 0.01 s−1, the peak stress is reduced by ...
Source
#1Fuyu Dong (SUT: Shenyang University of Technology)H-Index: 6
#2Yuan Ye (SUT: Shenyang University of Technology)H-Index: 1
Last. Hongjun Huang (SUT: Shenyang University of Technology)H-Index: 5
view all 7 authors...
Abstract The high-temperature deformation mechanisms and processing maps of an equiatomic body-centered-cubic(BCC) structured MoNbHfZrTi refractory high-entropy alloy (RHEA) were studied over the temperatures ranging from 1100 to 1250 °C and different strain rates varying from 10−3 to 0.5 s−1. Flow-stress analyses were performed, using an Arrhenius type relation. The activation energy (Q) for high-temperature deformation was calculated as 326.1 kJ/mol, and the related strain rate sensitivity (m)...
4 CitationsSource
#1Weidong Li (UT: University of Tennessee)H-Index: 16
#2Shuying Chen (UT: University of Tennessee)H-Index: 16
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
view all 3 authors...
Abstract Fatigue resistance is a crucial requirement to the novel high-entropy alloys when they come to engineering applications, as many metal structures used in practice are failed by cyclic loading. Here, a thorough analysis of the information on the low-cycle fatigue, high-cycle fatigue, crack-growth rates, and fatigue mechanisms in the high-entropy alloy literature unveils a guideline through which the discovery and design of fatigue-resistant high-entropy alloys can be facilitated. Overall...
10 CitationsSource
#1Bowen Zheng (SUT: Shenyang University of Technology)H-Index: 3
#2Fuyu Dong (SUT: Shenyang University of Technology)H-Index: 6
Last. Xuan Wang (Chongqing University)H-Index: 2
view all 12 authors...
Abstract To enhance wear properties of titanium alloys, in situ titanium matrix composites (TMCs) were synthesized by a melting cast method with (TiC + TiB) volume fractions of 0, 2, 4, 6, 8, and 10%. The results indicated that tribological properties of TMCs were increased owing to the dispersed distribution of (TiC + TiB) reinforcements, which improved the ability to resist the surface shear stress. Moreover, the stable transfer layer formed during wear reduced the shear strength and limited t...
11 CitationsSource
#1Lei Jiang (USTB: University of Science and Technology Beijing)H-Index: 3
#2Huadong Fu (USTB: University of Science and Technology Beijing)H-Index: 14
Last. Jianxin Xie (USTB: University of Science and Technology Beijing)H-Index: 21
view all 5 authors...
Two different thermo-mechanical processing routes, single-cold-rolling and double-cold-rolling, are adopted to process a Cu-Ni-Si alloy, and their effects on the microstructure and properties of the alloys are investigated. While keeping identical aging treatments and equivalent total cold-rolling deformation, 45-minute final aging at 450 °C endows the double-cold-rolling-processed alloys with a tensile strength of 754 ± 12 MPa, higher than 691 ± 3 MPa for the single-cold-rolling-processed alloy...
1 CitationsSource
#1Shuying Chen (UT: University of Tennessee)H-Index: 16
#2Weidong Li (UT: University of Tennessee)H-Index: 16
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
view all 12 authors...
The TiZrNbHfTa alloy with a single body-centered cubic (bcc) phase is of particular interest among refractory high-entropy alloys (HEAs) because it exhibits significantly large ductility compared to other refractory HEAs. To have a convincing appraisal of its potential in structural applications, its fatigue behavior needs to be understood in depth as fatigue is one of the major failure modes in practice. The in-air, room-temperature high-cycle fatigue study of the alloy at a stress ratio of 0.1...
Source
#1Shuying Chen (UT: University of Tennessee)H-Index: 16
#2Ling Wang (UT: University of Tennessee)H-Index: 6
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
view all 11 authors...
The temperature effect on the mechanical behavior of the HfNbTaTiZr high entropy alloy (HEA) was investigated at 77–673 K. The decrease of the yield strength with increasing the temperature was mec...
9 CitationsSource