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concentration. In addition, the combustion on the upper pipeline is obviously more violent than the lower part, and the temperature peak of the lower flame and the gas concentrations are expressed...%. Significantly, when the gas volume fraction is 10%, the flame is the brightest, and it reaches the maximum for the maximum explosion pressure and flame temperature peak, which are 0.74 MPa and 1 704.26 °C......
of temperature, however, peak strain increases gradually. With the increase of ratio of height to diameter, peak strength of sandstone decreases, which has an obvious size effect. A new theoretical model...Size effect of sandstone after high temperature under uniaxial compressionSU Hai-jian(苏海健)1, JING Hong-wen(靖洪文)1, MAO Xian-biao(茅献彪)1, ZHAO Hong-hui(赵洪辉)1, YIN Qian(尹乾)1, WANG Chen(王辰)2(1. State Key......
℃, the appearance color of the water cooling limestone changes to hoar. The peak stress has a decreasing trend on the whole. When the temperature changes from room temperature to 500 ℃, the peak strain gradually increases, and the elastic and deformation modulus gradually reduces. When the temperature is more than 500 ℃, the peak strain decreases first and then increases, and the elastic and deformation......
Low Temperature Luminescence Properties of Tm3+ Doped Aluminate Phosphor Zhuang Weidong1,Huang Xiaowei1,Xia Tian1,Teng Xiaoming1,Zhao Chunlei1,Cui Xiangzhong1 (1.National Engineering Research... and UV emission spectra at 20, 50 and 100 K show that the low temperature luminescence intensities become weak gradually with the increasing of the temperature under 147 and 254 nm excitation......
on the deformation temperature. Fig. 2 True stress-strain curves of deformed samples at strain rate of 0.1 s-1 and different temperatures The peak points of the curves shift to the lower stresses..., there are still some unrecrystallized regions in the microstructure. Fig. 3 Dependence of peak stress (a) and peak strain (b) to deformation temperature in hot compression experiments Fig. 4 Microstructure......
30Cr3MoV钢热压缩流变应力行为研究胡诗超1,张恒华1,吴晓春1,闵永安1,许珞萍1(1.上海市上海大学材料科学与工程学院)摘 要:利用Gleeble-3500进行热模拟压缩实验,对低合金钢30Cr3MoV在1 173~1 473 K变形温度以及0.1~10 s-1应变速率条件下的高温流变应力行为进行了研究.通过对真应力-真应变曲线进行分析得到该材料的形变激活能,流变应力本构方程以及峰值应变和峰值应力与变形温度,应变速率之间的关系方程.关键词:30Cr3MoV钢； 流变应力； 形变激活能； 峰......
under high temperature MA Lifeng1, JIA Weitao1, 2, HUANG Zhiquan1, LIN Jinbao1 (1. Heavy Machinery Engineering Research Center, Ministry of Education,Taiyuan University of Science and Technology... was calculated to study the thermal deformation behavior of AZ31B and further establish the structure-activity relationship between the true stress, strain, temperature and strain rate. The results show......
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dispersive spectrum(EDS) and transmission electron microscope(TEM) were used to study the microstructure evolution during high temperature deformation. The results show that, the peak stress value... rapidly. Fig.2 shows the relationship between peak stress and temperature of the alloys TC4, TS3 and TS5. The peak stress decreases with the increase of deformation temperature and strain rate. From......
