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,使得合金仅由FCC相和Laves相组成.此外,所有的抽拉速率下,衍射峰的位置没有发生变化,表明FCC相和Laves相结构稳定,可能是高熵合金的迟滞扩散效应导致的. 图5 定向凝固CoCrCuFeNiTi0.8高熵合金的XRD谱 Fig. 5 XRD patterns of directional solidification CoCrCuFeNiTi0.8 high...],CoCrFeNiAl0.7[25]. 图6 在25 μm/s下定向凝固CoCrCuFeNiTi0.8高熵合金的TEM像分析 Fig. 6 TEM image analysis of directional solidification CoCrCuFeNiTi0.8 high entropy alloy at 25 μm/s 表2 区域1与区域2的成分组成 Table 2 ......
.利用该相选择图,结合温度梯度与凝固速度比值(G/V)及合金原始成分(C0)可预测相选择规律及组织形态. 关键词:Pb-Bi合金；包晶合金；定向凝固；相选择 中图分类号:TG111.4；TG113.12 文献标志码:A Phase and microstructure selection in directional solidification...: Based on the directional solidification of Pb-Bi peritectic alloys with moderate or high and low growth velocities, the competition between the primary α and peritectic β phases was predicted by using......
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">The microstructure formation processes in HK40 and HH40 alloys were investigated through JmatP ro calculations and quenching performed during directional solidification. The phase transition routes of HK40 and HH40...Solidification microstructure formation in HK40 and HH40 alloysXian-fei Ding1,2,Dong-fang Liu3,4,Pei-liang Guo1,Yun-rong Zheng3,Qiang Feng2,31. National Center for Materials Service Safety......
and Cr(Mo) phase. The lamellar Cr(Mo) phase of the longitudinal microstructure is arranged along the direction of the directional solidification. At the present experiment, all of the creep curves of DS... fracture mode is debonding along the phase boundary. Key words: NiAl-based alloy; directional solidification; creep; creep rupture 由于NiAl和Cr都具有较好的高温抗氧化能力,且NiAl与体心立方结构的难熔金属如Cr,Mo,W等具有较小的界面失配度,其共晶组织具有良好......
in the mushy zone during directional solidification of Sn-Ni peritectic alloy was investigated in this study. Examination on the experimental results demonstrates that both the temperature gradient zone melting(TGZM) and Gibbs-Thomson(G–T) effects have obvious influences on the morphology of dendritic network during directional solidification. This is realized through different stages of liquid......
凝固速率对Nb-Ti-Si基合金整体定向凝固组织及固/液界面形态的影响王勇1,郭喜平1(1.陕西省西安市西北工业大学凝固技术国家重点实验室)摘 要:在2050℃的熔体温度下,在自行研制的定向凝固炉内实现了Nb-Ti-Si-Cr-Hf-Al-B-Y超高温合金的有坩埚整体定向凝固.采用XRD,SEM,EDS等方法分析了凝固速率分别为2.5,5,10,20,50和100μm/s时的整体定向凝固组织,组成相的择优取向及固/液界面形貌,并讨论了其共晶生长机制.结果表明:合金的定向凝固组织主要由沿着试棒轴向排列的横截面为多......
; Abstract: Directional solidification of Mg-2.35Gd (mass fraction, %) magnesium alloy...) by using a Bridgman-type directional solidification furnace with liquid metal cooling (LMC) technology. The cellular microstructures are observed. The cellular spacing λ decreases with increasing v......
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Trans. Nonferrous Met. Soc. China 26(2016) 859-864 Redistribution of iron during directional solidification of metallurgical-grade silicon at low growth rate Chuan-hai GAN1 , Ming FANG2,3, Lei...; accepted 6 January 2016 Abstract: Redistribution of iron during directional solidification of metallurgical-grade silicon (MG-Si) was conducted at low growth rate. Concentrations of iron were examined......
