Investigation on the microstructure, room and high temperature mechanical behaviors and strengthening mechanisms of the (TiB+TiC)/TC4 composites
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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Investigation on the microstructure, room and high temperature mechanical behaviors and strengthening mechanisms of the (TiB+TiC)/TC4 composites
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Investigation on the microstructure, room and high temperature mechanical behaviors and strengthening mechanisms of the (TiB+TiC)/TC4 composites

机译：（TIB + TIC）/ TC4复合材料的微观结构，房间和高温机械行为及加固机制研究

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AbstractA hybrid of (TiB+TiC) reinforced Ti-6Al-4V (TC4) matrix composite was produced by solution ball milling and spark plasma sintering process. The reinforcements were uniformly dispersed into the β grain boundary of the TC4 matrix. The size of β-grain is markedly reduced from more than 300?μm to about 23?μm after adding 9.5?vol % reinforcements to the matrix. The room-temperature tensile test results show that yield strength of the composites was enhanced and eventually saturated with the addition of reinforcements. Among all the strengthening mechanisms, grain-refinement effect plays the most important role and contributes 58.5–76.3% increment of the room-temperature yield strength. TiC-particles contribute 15.9–32.2% and TiB-whiskers share the rest contribution. However, the existence of TiBwclusters weakens the load-bearing effect of TiB. The high-temperature yield strength of the composites was improved with increasing volume fraction of the reinforcements and decreased with increasing test temperature. The grain-refinement strengthening efficiency decreases with increasing temperature, while by contrast, the strengthening efficiency of TiC particles goes up. Owing to the combination effect of matrix softening and dynamic recovery process, no saturation of high-temperature yield strength is observed even when the maximum volume fraction of reinforcements (9.5?vol %) were added to the composites.Highlights?(TiB+TiC) reinforced TC4 matrix composites were produced by SPS.?Grain-refinement effect contributes 59–76% increment of the yield strength at RT.?TiC contributes 16–32% and TiB-whiskers share the rest contribution at RT.?Grain-refinement strengthening efficiency decreases with increasing temperature.?The effect of TiC particles enhanced with the increasing of test temperature.]]>
机译：<！[CDATA [ 抽象 （TIB + TiC等）的混合增强的Ti-6AL-4V（TC4）基质复合物通过溶液制造球磨和放电等离子烧结过程。加强件被均匀地分散在基质TC4的β晶界。 β晶粒的尺寸被显着地从超过300？微米加入9.5？体积％增援到基质后减少到约23？微米。在室温拉伸试验结果表明，该复合材料的屈服强度提高，并最终通过加入增强材料的饱和。在所有的强化机制，晶粒细化效果发挥的常温屈服强度的最重要的作用，并有助于58.5-76.3％的增量。 TIC-颗粒有助于15.9-32.2％和TIB-须分担其余的贡献。然而，的TiB的存在瓦特簇削弱的TiB的承重效果。复合材料的高温屈服强度随加强件的体积分数提高，随着试验温度降低。的晶粒细化强化效率随着温度的升高而减小，而与此相反，的TiC颗粒的强化效率上升。由于基质的软化和动态恢复过程的组合效果，当加强件（？9.5体积％）的最大体积分数被添加到复合材料没有的高温屈服强度饱和度甚至观察到 亮点 < CE：列表项ID = “u0010”> （TIB + TiC等）增强TC4基复合材料通过产生的SPS <？CE：对ID = “P0015” 视图=“所有”>的在室温屈服强度晶粒细化效果有助于59-76％的增量 的TiC有助于16-32％和TIB-晶须共享在RT其余贡献。 <？CE：对ID = “p0025” 视图=”所有 “>晶粒细化加强效率随着温度的升高而减小 的TiC颗粒与测试温度的升高增强的影响 < / CE：简单 - 对> ]]>

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