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% under the pressure of 6 GPa, respectively. Under ambient pressure, cleavage plane on compressive fracture was large and smooth. When it was solidified under the pressure ranging from 4 to 6 GPa, cleavage plane on compressive fracture was small and coarse. In addition, dimple, tear ridge and lobate patterns existed.关键词:......
friction stir spot welding.There are two material flow components, i.e., the inward-or outward-directed spiral flow on the horizontal plane and the upward-or downward-directed flow on the vertical......
of interface growth were studied.The results showed that the remelted coating formed metallurgical bonding with the substrate.The micros tructures changed from plane crystal to dendrite,cellular dendrite,fine... was 1.886 ml-min-1.mm-2.The plane crystal,dendrite and cellular dendrite were mainly composed of compounds and solid solutions with Ni,Fe and Cu,and they were surrounded by strengthening phases composed......
; 文献标志码:A 文章编号:1672-7207(2020)05-1221-07 Design and control for electromagnetically driven two-dimensional precise plane motion platform ZHANG Wei, ZHOU Haibo... linear bearings were used to decouple plane motion and realize two-dimensional plane motion. Based on the mechanical model of linear motor, the basic control model of the platform was derived.Based......
of the mechanisms and the effects of mechanical activation for sulfide ores are obtained. For brittle sulfide ores with thermal instability, and incomplete cleavage plane or extremely incomplete cleavage plane... sulfide ores with thermal instability, and complete cleavage plane, the mechanism of mechanical activation is that a great amount of surface reactive sites are formed, and lattice deformation happens......
to be a or twin with the or plane serving as the twinning plane, and another type of orientation twin is seen to be a domain with the plane serving as the coherent plane. The boundaries of both domain and twin are found to be coincident with the twinning plane. In addition composite-twins are also observed in θ-Al45(Mn,Cr)7 particles. Possible formation mechanisms......
of the sheet processed by ECAR is changed and the crystal orientation evolves from (0002) basal plane orientation to coexistence of basal plane and non-basal plane. Compared with as-received sheet...线衍射谱 Fig.2 XRD patterns of sheet paralleling on rolling plane before and after ECAR 就极易发生孪生变形, 从而导致大量的孪晶出现. 而在每道次之间的退火过程中, 又由于发生了静态再结晶, 前一道次等径角轧制所产生的孪晶就消失了. 而随着轧制道次的增加, 剪切应变量减小, 所以孪晶数量逐渐减少......
)08-2493-06 Application of fuzzy information diffusion method in fissure structural plane analysis DONG Gui-ming1, SHU Long-cang2, WANG Mao-mei3, LIU Li-hong2, TAO Yu-fei4 (1. School of Resources... of the deficiency of traditional fissure structural plane analysis without considering the transitive information of samples, fuzzy information diffusion method was applied to the fissure structural plane......
is that the settlement of pile head induced only by negative skin friction and another part is the settlement of pile head caused by the work load which has moved down to the neutral plane when negative skin friction is hanging on the pile. The force equilibrium on the neutral plane acts like a prestressed force on pile which increases the pile stiff accordingly.Key words:negative skin friction; download; downdrag......
material. Static equilibrium equation of bimodulous cantilever under uniform load was established by using elastic mechanics theory. The location of neutral plane in bimodulous cantilever was determined by using static equilibrium equation. Plane stress problem of bimodulous cantilever under distributed loads was studied by Kantorovich method, and the stress formula was derived. The calculation......