Tensile properties of in situ synthesized (TiB + La2O3)/β-Ti composite
Tensile properties of in situ synthesized (TiB + La2O3)/β-Ti composite
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DOI：
10.1016/j.msec.2009.02.024
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发表时间：
2009-08
期刊：
影响因子：
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通讯作者：
Liqiang Wang;W. Lu;J. Qin;Fan Zhang;Di Zhang
中科院分区：
文献类型：
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作者：
Liqiang Wang;W. Lu;J. Qin;Fan Zhang;Di Zhang
通过在非自耗真空电弧重熔炉中均匀熔化原位合成了一种新型(TiB+La2O3)/Ti合金复合材料。选择Ti-35Nb-2Ta-3Zr β钛合金作为基体钛合金，并选择不同质量分数的LaB6作为添加物。通过光学显微镜（OM）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）检查微观结构。通过X射线衍射(XRD)鉴定物相分析。添加 0.1% LaB6 的样品获得了约 580 MPa 的最大极限拉伸强度和约 30% 的最高伸长率。过多的La2O3颗粒的出现和基体合金中氧的减少也对(TiB+La2O3)/Ti复合材料的强度和塑性有很大影响。添加 0.5% LaB6 的样品获得了约 526 MPa 的较低极限拉伸强度。
A novel (TiB+La2O3)/Ti-alloy composite was In situ synthesized through homogeneously melting in a non-consumable vacuum arc remelting furnace. Ti–35Nb–2Ta–3Zr β titanium alloy was chosen as the matrix Ti-alloy and different mass fractions of LaB6were chosen as additions. Microstructure observations were examined by optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscopy (TEM). The phase analysis was identified by X-ray diffraction (XRD). Largest ultimate tensile strength around 580 MPa and highest elongation around 30% is obtained in 0.1% LaB6-additioned specimen. The appearance of too many La2O3particles and the reduction of oxygen in the matrix alloy also attribute much to the strength and plasticity of (TiB+La2O3)/Ti composites. Lower ultimate tensile strength around 526 MPa is obtained in 0.5% LaB6-additioned specimen.