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A new flow stress model based on Arrhenius equation to track hardening and softening behaviors of Ti6Al4V alloyFu-Hui Zhu,Wei Xiong,Xi-Feng Li,Jun ChenDepartment of Plasticity Technology, Shanghai... on the stress-strain curves of isothermal compression test. A new flow stress model based on Arrhenius equation was proposed for TC4,which is composed of peak flow stress(PFS) prediction and strain......
Hot Deformation Behavior and Processing Maps of a High Al-low Si Transformation-Induced Plasticity Steel: Microstructural Evolution and Flow Stress BehaviorH.Q.Huang1,H.S.Di1,N.Yan1,J.C.Zhang1,Y... by fitting the strain factor with a sixth-order polynomial. The instability during hot rolling was discussed using processing maps. The results reveal that two types of flow stress curves(dynamic......
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behavior of V-5Cr-5Ti alloy QU Feng-sheng, WANG Zhen-hong, ZHANG Hao (China Academy of Engineering Physics, Mianyang 621900, China) Abstract: The flow stress behaviors of V-5Cr-5Ti alloy were investigated at the temperatures of 1150-1400 ℃ and strain rates of 0.001-1 s-1 using thermo-simulation machine. The constitutive equations of flow stress of V-5Cr-5Ti alloy at high temperature were established......
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, XRD and TEM were employed to characterize the flow stress behavior and microstructure of twin roll cast ZK60 magnesium alloy during initial stage of hot compression at elevated temperature of 300 ℃ and 400 ℃ and a given strain rate of 10-2 s-1. The results suggest that flow stress drop during initial stage of hot compression at 300℃, generally led by dynamic recrystallization, is attributed......
Microstructure and hot flow stress at 970℃ of various heat-treated Ti2AlNb sheetsYong Wu,Rong-Lei Fan,Xian-Jun Zhou,Ming-He ChenCollege of Mechanical and Electrical Engineering,Nanjing University... plastic deformation promoted the O→B2/βphase transition and the globularization of O-phase lamellar grains at 970℃.Calculated by the creep equation and the iso-stress method,the grain size exponent......
J. Cent. South Univ. Technol. (2008) 15: 564-568 DOI: 10.1007/s11771-008-0106-8 Numerical simulation of flow around square cylinder using different low-Reynolds number turbulence models ZHANG... to simulating unsteady turbulence flow around a square cylinder in different phases flow field and time-averaged unsteady flow field. Meanwhile, drag and lift coefficients of the four different low-Reynolds......
are the key parameters of deformation activation energy. When the deformation temperature is definite, the relation between flow stress and strain rate is liner, and the variation of deformation activation energy of experimental alloy is not big in 523-573 K, but the deformation activation energy increases rapidly above 573 K. The relation of peak flow stress, strain rate and temperature can be described......
parameters and the flow stress models are shown in Tables 1 and 2, respectively. Due to the symmetry of the deformation process, only one quarter of the block is adopted for the finite element analysis..., an ideal condition that the frictional coefficient is zero is considered. Fig.1 Finite element analysis model Table 1 Parameters of material[17-18] Table 2 Flow stress model of materials[18-19......