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TiBw對(duì)高溫鈦基復(fù)合材料基體的強(qiáng)化作用研究
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趙而團(tuán)(1976— )，男，博士，副教授。

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山東省自然科學(xué)基金資助項(xiàng)目(ZR2017MEE038)


Study on Strengthening Effect of TiBw on Matrix in High Temperature Titanium Matrix Composites
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    摘要:

    以名義成分為T(mén)i-6Al-4Sn-10Zr-1Mo-1Nb-1W-0.3Si的基體鈦合金和3%(體積分?jǐn)?shù))TiBw增強(qiáng)高溫鈦基復(fù)合材料為研究對(duì)象，采用納米壓痕法對(duì)比分析了TiBw對(duì)基體的強(qiáng)化作用。結(jié)果表明：3%TiBw增強(qiáng)鈦基復(fù)合材料基體的平均微區(qū)硬度為6.18 GPa，較無(wú)增強(qiáng)相的基體鈦合金提升14.4%；通過(guò)分別對(duì)比不同厚度α層片處以及距離TiBw遠(yuǎn)近不同位置的硬度，發(fā)現(xiàn)TiBw增強(qiáng)高溫鈦基復(fù)合材料基體微區(qū)硬度的提升主要源于增強(qiáng)相TiBw引起的基體組織細(xì)化，以及靠近TiBw增強(qiáng)相區(qū)域的基體受壓縮變形時(shí)易于受阻；添加TiBw后使得基體微觀組織不均勻，導(dǎo)致硬度離散度較大。

    Abstract:

    The micro-zone hardness of titanium alloy matrix of Ti-6Al-4Sn-10Zr-1Mo-1Nb-1W-0.3Si and 3vol%TiBw reinforced high temperature titanium matrix composites were investigated by nano-indentation, respectively. The results show that the average hardness of titanium matrix composites is 6.18 GPa, which is higher than titanium alloy matrix by 14.4%. By comparing the hardness with different thickness of α lamellar and the hardness with different distances to the TiBw respectively, it is found that the TiBw reinforced high temperature titanium matrix composites present higher hardness than the titanium alloy matrix. The reason is that the matrix microstructure is refined by TiBw and the deformation of matrix near the TiBw is easy to be blocked. The hardness data show a large dispersion due to the inhomogeneous microstructure caused by the addition of TiBw.

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孫世臣,田玉晶,胡辰,方曉英,趙而團(tuán). TiBw對(duì)高溫鈦基復(fù)合材料基體的強(qiáng)化作用研究[J].鈦工業(yè)進(jìn)展,2020,37(3):15-19.

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  • 收稿日期:2020-01-19
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  • 在線發(fā)布日期: 2020-09-02
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