High-pressure strengths of Ni3Al and Ni-Al-Cr
High-pressure strengths of Ni3Al and Ni-Al-Cr
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DOI：
10.1016/j.jallcom.2018.01.142
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发表时间：
2018-03
影响因子：
6.2
通讯作者：
S. Raju;B. Godwal;Ashutosh Kumar Singh;R. Jeanloz;S. Saxena
中科院分区：
文献类型：
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作者：
S. Raju;B. Godwal;Ashutosh Kumar Singh;R. Jeanloz;S. Saxena
高压X射线衍射Ni 3Al，非流体静力学压缩在室温下30 GPa的径向几何形状可以解释在流体静力学压力-体积状态方程。我们发现Ni 3Al的屈服强度随着压力从0增加到30 GPa而从约0.2增加到2 GPa。屈服强度值确定从X射线衍射在轴向几何形状，包括泊松比效应和压力梯度的方法是在良好的雅阁符合彼此。我们的研究结果表明，无论是纯的和Cr掺杂（7原子）的强度。Ni 3Al合金的屈服强度略高于Ni-Al-Cr合金。
High-pressure x-ray diffraction on Ni3Al, non-hydrostatically compressed at room temperature to 30 GPa in radial geometry can be interpreted in terms of a hydrostatic pressure–volume equation of state. We found the yield strength of Ni3Al to increase from about 0.2 to 2 GPa as pressure increases from 0 to 30 GPa. Yield-strength values determined from x-ray diffraction in axial geometry by including a Poisson ratio effect and pressure gradient methods are in good accord with each other. Our results indicate that the strengths of both pure and Cr-doped (7 at. %) Ni3Al increase with pressure, with the yield strength of Ni3Al slightly higher than Ni-Al-Cr alloy.