Gongyao Wang
University of Tennessee
Ultimate tensile strengthAmorphous metalFatigue limitDeformation (engineering)Composite materialCompression (physics)MetallurgyMaterials scienceStructural materialDeformation mechanismShear bandAlloyHigh entropy alloysFatigue testingFracture (geology)ZirconiumAmorphous solidFracture mechanicsForensic engineeringPlasticityMicrostructureStress (mechanics)Atomic ratioShear (geology)
Publications 116
#1Michael C. Gao (DOE: United States Department of Energy)H-Index: 36
#2E-Wen HuangH-Index: 17
Last. Liang Jiang (Yantai University)
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#1Xie Xie (UT: University of Tennessee)H-Index: 16
#2Yu-Chieh Lo (NCTU: National Chiao Tung University)H-Index: 14
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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Abstract Bulk metallic glasses (BMGs) possess amorphous structure and show unique mechanical properties, such as extremely high strength and excellent damage tolerance, entitling them as potential structural materials. So far a great amount of work has been conducted to study BMGs’ macroscopic mechanical properties and examine corresponding microscopic deformation defects. However, the connection between macroscopic inhomogeneous deformation at room temperature and microscopic deformation carrie...
22 CitationsSource
#1Haoling Jia (UT: University of Tennessee)H-Index: 10
#2Gongyao Wang (UT: University of Tennessee)H-Index: 28
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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Abstract A fundamental understanding of the fatigue and fracture behavior of bulk metallic glasses (BMGs) and their composites is of critical significance for designing new BMG systems and developing new manufacturing and processing techniques so as to broaden the scope of applications of BMGs and their composites. However, the fatigue and fracture studies on BMGs are limited so far, compared to other mechanical properties. The present work reviews the fatigue and fracture behavior of BMGs and t...
42 CitationsSource
#1Gongyao WangH-Index: 28
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#1Yuan Wu (USTB: University of Science and Technology Beijing)H-Index: 37
#1Yun-Hui Wu (USTB: University of Science and Technology Beijing)H-Index: 7
Last. Zhaoping Lu (USTB: University of Science and Technology Beijing)H-Index: 56
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Abstract Transformation-induced plasticity in a strain-softening amorphous matrix consisting of austenite B2 phase was studied by in-situ neutron diffraction, coupled with molecular dynamic simulation. It was found that the martensitic transformation from B2 to B19′ upon loading commenced at the macroscopic yielding which increased with the decrease of the fraction of the parent austenite B2 phase, and the threshold lattice strain for the martensitic transformation is almost the same in differen...
61 CitationsSource
#1Tengfei Yang (PKU: Peking University)H-Index: 20
#2Zhi Tang (UT: University of Tennessee)H-Index: 18
Last. Yanwen Zhang (UT: University of Tennessee)H-Index: 53
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Abstract Deformation mechanisms of a high-entropy alloy with a single face-centered-cubic phase, Al0.1CoCrFeNi, at elevated temperatures are studied to explore the high temperature performances of high-entropy alloys. Tensile tests at a strain rate of 10−4 s−1 are performed at different temperatures ranging from 25 to 700 °C. While both yield strength and ultimate tensile strength decrease with increasing temperature, the maximum elongation to fracture occurred at 500 °C. Transmission electron m...
14 CitationsSource
#1Yuan WuH-Index: 37
#1Yun-Hui WuH-Index: 7
Last. Zhaoping LuH-Index: 56
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#1M. A. James (Alcoa)H-Index: 4
#2K. Maciejewski (Alcoa)H-Index: 1
Last. R. BucciH-Index: 1
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This paper described an improved fatigue crack growth rate (FCGR) material characterization process that partitioned residual stress effects from the material “true” FCGR behavior, leading to FCGR design curves that are free of residual stress bias. The material used in the program had high residual stress intentionally introduced. Two test methods from the literature were used to characterize the material: the adjusted compliance ratio (ACR) test method for closure correction, and the crack com...
4 CitationsSource
#1Bilin Chen (UT: University of Tennessee)H-Index: 6
#2Gongyao Wang (UT: University of Tennessee)H-Index: 28
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 94
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The fatigue-crack-growth behavior of two types of pipeline steels, Alloy B [Fe–0.05C–1.52Mn–0.12Si–0.092Nb, weight percent (wt%)] and Alloy C (Fe–0.04C–1.61Mn–0.14Si–0.096Nb, wt%), have been investigated. Compact-tension (CT) specimens have been tested at various frequencies (10, 1, and 0.1 Hz) and different R ratios (0.1 and 0.5, R = Pmin/Pmax where Pmin is the minimum applied load, and Pmax is the maximum applied load) in air. It is concluded that higher R ratios lead to faster crack-growth ra...
1 CitationsSource
#1Peter K. LiawH-Index: 94
#2Fan ZhangH-Index: 25
Last. Michael HemphillH-Index: 1
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6 CitationsSource