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J. Cent. South Univ. (2017) 24: 1619-1626 DOI: 10.1007/s11771-017-3567-9 Investigation on jointed rock strength based on fractal theory YANG Lan-lan(杨兰兰)1, 2, XU Wei-ya(徐卫亚)1, 2, MENG Qing-xiang(孟庆... of jointed rock mass; test results show that the fractal dimension of rock joints can be related to the equivalent cohesion strength and shear strength of the rock mass. When the fractal dimension......
-sized nozzles and shielding hoods were designed. Table 2 lists the welding parameters in the experiments. Table 1 Chemical composition of titanium alloy TC4 (mass fraction, %) Table...Article ID: 1003-6326(2005)05-1081-04 Double-sided gas tungsten arc welding process on TC4 titanium alloy GAO Hong-ming(高洪明), BAI Yan(白 岩), YANG Tian-dong(杨天东) (State Key Laboratory......
progress of AZ91D magnesium alloy better, it is necessary to investigate the EN characteristics of the materials in neutral chloride medium. Df (fractal dimension) is a quantitative parameter... products. In the end of immersion, Df increases again, which means that the severe corrosion occurs on the local region of the surface. Fig.4 Fractal dimension of AZ91D magnesium alloy in different......
Effect of pouring temperature on fractal dimension of primary phase morphology in semi-solid A356 alloy LIU Zheng(刘 政)1, 2, MAO Wei-min(毛卫民)3, LIU Xiao-mei(刘小梅)2 1. Jiangxi Nonferrous... in semi-solid A356 alloy prepared by low superheat pouring and slightly electromagnetic stirring were calculated, and the effect of pouring temperature on fractal dimension of primary phase......
. The bonding joint was obtained (Fig.1) and the joint strength was tested and the results are listed in Table 2. From the data of Table 2, the joint strength of HIP diffusion bonding of P/M titanium alloy... that the maximized strength of HIP diffusion bonding between P/M titanium alloy Ti-6Al-4V and stainless steel 1Cr18Ni9Ti can be up to 388 MPa and the microstructure of bonding joint is acceptable. Key words......
with a fractional dimension that indexes the complexity of patterns in the object [2]. With the maturation of fractal analysis, different measurement methods have been developed for a range of research... was then calculated, and we found that the fractal dimension is useful as a quantitative representation of the way in which the rock will fail under an impact load. 2 Methods 2.1 Fractal principle and definition......
composition of Ti-15-3 titanium alloy (mass fraction, %) Table 2 Chemical composition of 304 stainless steel (mass fraction, %) Table 3 Physical properties and tensile strength of Ti-15-3 titanium... a certain strength, which could supply guidance to the fusion welding of titanium alloy and steel. Fracture location of the joint is given in Fig.7. It could be seen that fracture occurred......
0.6 to 2 MPa, which is considered negligible. So it can be concluded that with ACT stepped in, the shearing strength is decreased and the ductility is improved. Figure 5 Shearing strength-punch... ARTICLE J. Cent. South Univ. (2019) 26: 1582-1591 DOI: https://doi.org/10.1007/s11771-019-4114-7 Influence of AZ31 sheet treated by cryogenic on punch shearing HU Zhi-qing(胡志清)1, 2, GUO Chao-fan(郭超......
of the BD joints is tested and the fracture mode is analyzed by SEM observation. 2 Experimental A Ti-6Al-4V rolled bar in the annealed condition, and an as cast titanium aluminide alloy... diagram of g-TiAl/Ti-6Al-4V alloy diffusion bonding mode To determine the bonding quality, the three-point bending strength of the joints was tested in comparison with that of the base g-TiAl alloy......