Nanoindentational and conventional mechanical properties of spark plasma sintered Ti-Mo alloys
Nanoindentational and conventional mechanical properties of spark plasma sintered Ti-Mo alloys
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DOI：
10.1016/j.jmrt.2020.07.066
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发表时间：
2020-09-01
影响因子：
6.4
通讯作者：
Mohammadi, Mohsen
中科院分区：
文献类型：
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作者：
Asl, Mehdi Shahedi;Delbari, Seyed Ali;Mohammadi, Mohsen
研究了放电等离子烧结钛钼合金的致密化行为和力学性能。所有Ti-(4、8、12、16和20 wt%) Mo样品在1200℃下50 MPa下烧结5分钟。Mo含量为16 wt.%的ti基合金的相对密度达到99.9%，总体硬度变化趋势与Ti-16 wt.% Mo合金在宏观（30 kg）和微观（300 g）尺度上的硬度最高，分别为372 HV30和592 HV0.3。ti - 8wt .% Mo试样的最大极限抗拉强度为室温852 MPa和600 MPa。这种现象与β - ti相的形成和应变诱导转变现象有关。Ti-12 wt.% Mo合金的抗折强度最高，接近2 GPa，这可能是Ti和Mo之间形成固溶体的结果。最后，通过纳米压痕技术计算Mo含量为12和20 wt.% Mo的样品中各相的纳米硬度、弹性模量和刚度的平均值，结果表明，Mo含量为12和20 wt.% Mo的样品在上述所有品质中均具有更高的值。(C) 2020作者。Elsevier B.V.出版
The densification behavior and mechanical properties of spark plasma sintered titanium-molybdenum alloys were investigated in this paper. All Ti-(4, 8, 12, 16, and 20 wt%) Mo samples were sintered at 1200 degrees C for 5 min under 50 MPa. A significant relative density of 99.9% was secured for the Ti-based alloy with 16 wt.% Mo. The overall trend of hardness was similar to that of the relative density as Ti-16 wt.% Mo alloy showed the highest hardness values of 372 HV30 and 592 HV0.3 in macro (30 kg) and micro scales (300 g), respectively. Maximum ultimate tensile strength values (852 MPa at room temperature and 600 MPa at 600 ) belonged to the Ti-8 wt.% Mo sample. Such an observation was related to the formation of beta-Ti phase and the strain-induced transformation phenomenon. The highest flexural strength of similar to 2 GPa belonged to the Ti-12 wt.% Mo alloy, which may be a result of solid solution formation between Ti and Mo. Finally, average values of nano hardness, elastic modulus, and stiffness of various phases available in the samples with 12 and 20 wt% Mo were calculated through nano-indentation technique and the former specimen presented higher values in all the mentioned qualities. (C) 2020 The Authors. Published by Elsevier B.V.