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Trans. Nonferrous Met. Soc. China 22(2012) 391-397 Effect of forced lamina flow on microsegregation simulated by phase field method quantitatively WANG Jun-wei1, WANG Zhi-ping1, 2, LU Yang1, 2, ZHU... phase field model coupled with flow field. The microsegregation, concentration maximum value, boundary thickness of concentration near upstream dendrite and normal to flow dendrite, and downstream......
Microstructure and composition characteristics of transition zone in diffusion bonding of Fe3Al intermetallics to Q235 low carbon steelWU Hui-qiang(吴会强)1, FENG Ji-cai(冯吉才)1, LI Ya-jiang(李亚江)2, WANG...% and corresponding phase changes from Fe3Al with DO3 type body-centered cubic (bcc) structure to α-Fe (Al) solid solution, and both structures have an orientation relationship of crystal (11-0)α-Fe(Al......
toward the melt in floating zone process usually indicates proper grain selection and stable growth. The section is comprised of dendrites of the Gd2PdSi3 principal phase along with a dark matrix... of the traveling zone at fixed zone length. It is proved by EDX that there are three phases in the melt, Gd2PdSi3 phase, GdPd2Si2 phase and tiny Si phase. That is, the melt composition of the traveling......
of yield stress. Finally the crack tip plastic zone CTPZ was introduced to interpret the variations of KIC. Key words: titanium alloy; fracture toughness; crack tip plastic zone 随着损伤容限设计准则在航空航天领域中应... fraction, %) 图1 β单相区及α+β两相区热处理得到的显微组织 Fig.1 Lamellar microstructure with coarse β grain heat-treated above Tβ (a), and short-bar structure heat-treated in α+β phase region (b) 表2 ......
is visible in the partially melted zone (PMZ) owing to the inhibitory action of the fine dispersed precipitates and the fine-grained microstructure in the as-rolled magnesium alloy sheets. The fusion zone (FZ) is featured with the equiaxed dendritic grains of the average grain size about 8 μm, which are similar to those in the heat affected zone (HAZ), and this contributes to the relatively high joint......
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in porous medium, solid phase plug flow model, heterogeneous pyrolysis reaction kinetics model and equivalent heat flux boundary model. In addition, the model was applied to research the heat and mass... zone with length of about 2.0 m (T＞1423 K) is formed at the heights of layers 6, 7 and 8, which will further promote green coke polymerization and achieve carbon structure rearrangement. The model......
as a cast alloy.In the present work,the influence of cooling rate during mushy zone on solidification behavior of Ti-44Al-4Nb-2Cr-0.1B alloy was investigated.A vacuum induction heating device combining with temperature control system was used.The Ti-44Al-4Nb-2Cr-0.1B alloy solidified from superheated was melted to β phase with the cooling rates of 10,50,100,200,400 and 700 K·min-1,respectively......
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