Temperature dependence of tensile behavior of Ni-based superalloy M951
Temperature dependence of tensile behavior of Ni-based superalloy M951
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DOI：
10.1016/j.msea.2008.02.013
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发表时间：
2008-08-20
期刊：
影响因子：
6.4
通讯作者：
Hu, Z. Q.
中科院分区：
文献类型：
--
作者：
Lian, Z. W.;Yu, J. J.;Hu, Z. Q.
M951合金的拉伸性能在本研究中显示出显着依赖于温度。与其他高温合金一样，屈服强度和拉伸强度在室温至600 ℃之间略有下降，然后两种强度在中间温度下均显示出峰值，并且在850 ℃以上均急剧下降。伸长率随温度波动，在800 ℃时最小。透射电镜观察表明，低温下变形机制主要是位错对和滑移带的γ剪切。高温变形以γ '旁路变形为主。在中温时，它表现出从γ '剪切到旁路的转变。(C)2008 Elsevier B.V.保留所有权利。
Tensile properties of M951 alloy are shown to be significantly dependent on temperatures in this study. Like in other superalloys, the yield and tensile strengths decreased slightly between room temperature and 600 degrees C, then both strengths showed peak values at intermediate temperatures, and both decreased sharply above 850 degrees C. The elongation fluctuated with temperature with its minimum at 800 degrees C. The TEM observations showed that at low temperature the dominant deformation mechanism was gamma' shearing by dislocation pairs and slip bands. At high temperature, the deformation was dominated by gamma' by-pass. At intermediate temperature it showed a transition from gamma' shearing to by-passing. (C) 2008 Elsevier B.V. All rights reserved.