共搜索到17197条信息，每页显示10条信息，共1720页。用时：0小时0分0秒468毫秒
Dynamic deformation behavior and microstructural evolution during high-speed rolling of Mg alloy having non-basal textureSang-Hoon Kim1,Jeong Hun Lee2,Chong Soo Lee3,Jonghun Yoon4,Sung Hyuk Park11... parallel to the transverse direction(TD) are subjected to hot rolling with different reductions at a rolling speed of 470 m/min. The initial grains with a TD texture are favorable for {10–12} twinning under......
% oxygen for particle diameter of 5.4 μm at initial temperature of 300 K and atmospheric pressure and β=0.65 Figure 6 demonstrates the variation of flame propagation speed with equivalence ratio in air... speed with equivalence ratio in pure carbon dioxide reaction media at initial temperature of 300 K , atmospheric pressure and β=0.65 Figure 8 illustrates the quenching distance in terms of aluminum......
Microstructural evolution of high strength 7B04 ingot during homogenization treatment LI Nian-kui(李念奎), CUI Jian-zhong(崔建忠) Key Laboratory of Electromagnetic Processing of Materials, Ministry...; Abstract: The evolution of the microstructure and phases of the direct chill semicontinuous casting......
is small in a narrow weld metal zone. Key words: microhardness; microstructure; misorientation angle; non-uniformity; welding speed 1 Introduction Ti6Al4V titanium alloy is widely used in aerospace... affected zone (HAZ) and weld metal, which proved that the welding speed affected the martensite content and microhardness. Grain orientations of the different regions of a welded joint are related......
of differential format are all included. The simulation results show that the evolution of dendrite morphology is as follows: the initial circle nucleus transforms to the rectangle one firstly, then its.... The definition of initial condition, boundary condition and the stability condition of differential format are all included. 2) The dendrite morphology evolution: the initial circle nuclei transform......
constitutive model was proposed to modify the term in the original Johnson-Cook constitutive model. The new model can be used to describe and predict the flow stress of AA1070 aluminum with different initial grain sizes in the hot working process. This developed model considers thermal softening, strain-rate hardening, strain hardening, initial grain size, and interactions with each other and can correctly......
......
on the outer and inner surfaces of the pipe were analyzed. The results suggest that the final residual stresses in the weld and its vicinity are not affected by the initial residual stresses of the structure...; initial residual stress 1 Introduction The residual stress in welded structures mainly results from the non-uniform expansion and contraction of the weld and the base material in the vicinity, due......
rolling speeds were performed and finally the optimum operating rolling speed(50.0 ± 0.8 m/min) was obtained. Further, the effects of rolling reduction and initial temperature were assessed...Optimum rolling speed and relevant temperature-and reduction-dependent interfacial friction behavior during the break-down rolling of AZ31B alloyWeitao Jia1,Yan Tang1,Fangkun Ning1,Qichi Le1,Lei......
Effect of Alloying Additions on the Oxidation of High Speed Steels under Dry and Wet Conditions () 摘要:An investigation has been carried out into the effects of chromium and vanadium content on the oxidation rate and on the adhesion of oxide scales grown on three different chemical compositions of high speed steels under dry and wet conditions. The oxidation tests were carried out......
