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Microstructural evolution and FCC twinning behavior during hot deformation of high temperature titanium alloy Ti65Zhixin Zhang1,2,Jiangkun Fan1,3,Bin Tang1,3,Hongchao Kou1,3,Jian Wang2,Xin... research has not stopped. In the present work, detailed analyses on microstructure evolution and hot deformation behavior of a new temperature resistant 650?C titanium alloy Ti65 were investigated from......
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NUMERICAL INVESTIGATION OF STRAIGHT-LINE LASER FORMING UNDER THE TEMPERATURE GRADIENT MECHANISM Z.Q. Yao1,J. Hu1,H. Shen1,Y.J. Shi1 (1.School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China) Abstract:Laser forming is a new flexible and dieless forming technique. To achieve the high accuracy forming, the temperature gradient mechanism (TGM) is studied......
were obtained using tensile testing and microstructure quantification, and new high temperature deformation energy models were established. Results show that the grain interior deformation energy increases with increasing the strain rate and decreases with increasing the temperature. The variation in the grain boundary deformation energy is opposite to that in the grain interior deformation energy......
microstructure and true stress were characterized as function of the deformation temperature and the strain rate using Gleeble-1500 thermal mechanical simulator. The results show that, with the increase of the strain rate from 0.001 s-1 to 10 s-1, the peak value of true stress is elevated at the same deformation temperature, and at the same strain rate the peak value of the true stress decreases......
Effect of strain rate and temperature on the deformation behavior in a Ti-23.1Nb-2.0Zr-1.0O titanium alloyYi Yang1,Di Xu1,Sheng Cao2,Songquan Wu1,Zhengwang Zhu3,Hao Wang3,Lei Li4,Shewei Xin4,Lei... the microstructure evolution during the deformation.Numerous deformation phenomena,including dislocation slip,twinning of both {332}{113) and {112}{111} modes,stress-induced α " martensite(SIMα")and stress-induced ω......
differences of the deformation resistance under different atmosphere and different temperatures, compacts were heated to different temperatures and cooled to room temperature (no defects were found...?m, exceeding the deformation of the compacts under vacuum atmosphere greatly. As shown in Fig.4, the difference of the deformation resistance at different temperatures focuses on the temperature zone......
is meshed with quadrilateral element. These elements have both temperature and displacement as their degrees of freedom to predict both deformation and temperature variation during the process... The temperature gradient is formed in sheet metal, the lowest temperature is located in dome centre areas and increases along the radial direction. As the deformation proceeds, the sheet looses temperature......
℃ and strain rate of 0.001-1 s-1 with Gleeble 1500 thermal simulator. In addition, the deformation activation energy Q was calculated. The results show that the strain rate and deformation temperature have obvious effect on the true stress. The peak value of flow stress becomes larger with increasing strain rate at the same temperature, and gets smaller with the increasing deformation temperature......
temperature, it is essential that the strength and deformation properties of high-strength concrete subjected to high temperatures should be clearly understood[3-6]. The present paper, which focuses... that the effect of exposure to high temperature on strength and deformation characteristics of high-strength concrete should be well understood. This paper provides a part of an ongoing study......