Lianyong Xu
Tianjin University
Ultimate tensile strengthFinite element methodCreepDislocationComposite materialHardening (metallurgy)MetallurgyMaterials scienceWeldingCorrosionGrowth rateAlloyFracture (geology)Grain boundarySolderingStructural engineeringPlasticityMicrostructureStress (mechanics)Austenite
146Publications
24H-index
1,748Citations
Publications 146
Newest
#1Yongdian Han (TJU: Tianjin University)H-Index: 24
#2Jiyuan Fei (TJU: Tianjin University)
Last. Lianyong Xu (TJU: Tianjin University)H-Index: 24
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Abstract null null As a kind of high strength microalloyed steel, pipeline steel has high strength and toughness. However, the formation of the intercritically reheated coarse-grained heat affected zone (ICCGHAZ) during the welding process is an important limitation affecting its performance. Herein, microstructural transformation in the ICCGHAZ of X100 pipeline steel after a secondary thermal cycle and hydrogen sulfide stress corrosion cracking (SSCC) resistance of the transformed microstructur...
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#1Wei Chen (TJU: Tianjin University)H-Index: 1
#2Lianyong Xu (TJU: Tianjin University)H-Index: 24
Last. Hongyang Jing (TJU: Tianjin University)H-Index: 25
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Abstract Directed energy deposition (DED) technology commonly known as additive manufacturing (AM), is a rapid prototyping method for fabricating metallic functional components with minimum finishing operations. However, excessive tensile residual stress (RS) is often a potential source of structural failure due to the fact that it can cause surface/subsurface cracking of DED parts. In this work, the RS properties in DED specimens made of the low-temperature transformation (LTT) pre-alloyed powd...
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#1Deming Xiao (TJU: Tianjin University)
#2Hongyang Jing (TJU: Tianjin University)H-Index: 25
Last. Yongdian Han (TJU: Tianjin University)H-Index: 24
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In this present study, the microstructural and damage characterizations of Inconel 740H alloy welded joint during creep process at 750 °C and 210 MPa were investigated via scanning electron microscopy, electron back-scattered diffraction, and transmission electron microscopy. For the base metal (BM), no significant change for austenite grains occurs with increasing creep time from 1000 to 2651 h. Creep cavities mainly distributed along the grain boundaries are formed due to the existence of larg...
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#1Kaimeng Wang (TJU: Tianjin University)H-Index: 2
#2Hongyang Jing (TJU: Tianjin University)H-Index: 25
Last. Kai Song (TJU: Tianjin University)H-Index: 3
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Abstract The low cycle fatigue behavior of Inconel 750H superalloy, a newly designed Nickel-based superalloy, was studied in this work. The superalloy exhibited an initial cyclic hardening and a following continuous cyclic softening behavior at the strain amplitudes from 0.35% to 0.6%, while a stress saturation at the strain amplitude of 0.3%. Cyclic response considering cyclic stress, plastic strain, and hysteresis loop area was studied. Four interrupted cycle tests were conducted at the strain...
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Abstract This study investigates the relationship between the microstructural evolution and low cycle fatigue behavior of 316H austenitic steel to understand its performance at 550°C in generation-IV nuclear power plants. The 316H steel exhibited non-Masing behavior, where the cyclic hardening behavior followed by cyclic softening behavior was presented. The increased strain amplitude led to a higher degree of cyclic softening, which was related to the evolution of dislocation structures during ...
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#1Nuohao LiuH-Index: 2
#2Huwei DaiH-Index: 3
Last. Jiewei Lin (TJU: Tianjin University)H-Index: 8
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Abstract The crack growth behavior of Hastelloy X under creep-fatigue interaction at high temperature is investigated by a nonlinear creep-fatigue interaction damage model. Multiaxial stress is considered both in the fatigue and creep damage models. The effect of the variance of fatigue damage parameters is analyzed in a quantitative method and some linear effects were observed. The influence of hold time, crack depth ratio and load level on the crack growth behavior are studied and results unde...
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#1Kai Song (TJU: Tianjin University)H-Index: 3
#2Lei Zhao (TJU: Tianjin University)H-Index: 23
Last. Shenghao Pan (TJU: Tianjin University)
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Abstract A dislocation model for predicting creep deformation and long-term life of Sanicro 25 austenitic steel was proposed on the basis of microstructural evolution and particle hardening mechanism. This approach was integrated by four sub-models of (i) time- and strain-induced detachment stress model, (ii) Orowan strengthening model of two precipitates, (iii) void nucleation and growth model, and (iv) temperature-induced strain energy model. The validation of the proposed model was verified b...
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#1Yang Zhang (TJU: Tianjin University)H-Index: 2
#2Hongyang Jing (TJU: Tianjin University)H-Index: 25
Last. Lei Zhao (TJU: Tianjin University)H-Index: 23
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#1Zhengxin Tang (TJU: Tianjin University)H-Index: 6
#2Hongyang Jing (TJU: Tianjin University)H-Index: 25
Last. Yalin Gao (TJU: Tianjin University)H-Index: 2
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Sanicro 25 is a candidate material for reheaters and superheaters used in 650–700 °C advanced ultra-supercritical power plants. A composition-matched weld filler metal has been developed to join Sanicro 25 tubes through tungsten inert gas welding. Creep tests of the Sanicro 25 welded joint were conducted at 973 K under a stress of 180–240 MPa. The creep lifetime decreased with an increase in applied stress. The welded joint crept at 180 MPa fracture at the base metal (BM) in a mixed fracture typ...
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#1Lei Zhao (TJU: Tianjin University)H-Index: 23
#2Xueyan Qi (TJU: Tianjin University)
Last. Kai Song (TJU: Tianjin University)H-Index: 3
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