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Influence of the heating rate on the recrystallization behavior of molybdenum

机译：加热速率对钼重结晶行为的影响

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摘要

Due to its high stacking fault energy, the recrystallization behavior of molybdenum is strongly dominated by concurrent recovery processes. Therefore, the extent of pre-recovery is believed to influence subsequent recrystallization processes. In the present investigation, this influence was studied by continuous heating experiments of cold-compressed specimens with linear heating rates in the range of 1-1000K/min to target temperatures in between 800 and 1300℃. The subsequent microstructural characterization was carried out by electron-channeling-contrast-imaging, hardness tests and electron-back-scatter-diffraction. It was revealed that pre-recovery promoted subsequent recrystallization at lower heating rates (1-100 K/min) which resulted in increased volume fractions of recrystallized grains with decreasing heating rate. In contrast to that, upon rapid heating (1000 K/min), low temperature pre-recovery seemed negligible. Consequently, there was enough stored energy left for rapid recrystallization at higher temperatures. The effect of the heating rate on the recrystallization behavior of molybdenum is discussed.
机译：由于其较高的堆垛层错能，钼的重结晶行为在同时进行的回收过程中占主导地位。因此，据信预回收的程度会影响随后的重结晶过程。在本研究中，通过对线性压缩速率为1-1000K / min的冷压缩样品进行连续加热实验，以达到800至1300℃的目标温度，研究了这种影响。随后的微结构表征是通过电子通道对比成像，硬度测试和电子反向散射衍射进行的。揭示了预回收促进了随后在较低的加热速率（1-100 K / min）下的重结晶，这导致了随着加热速率的降低，重结晶晶粒的体积分数增加。与此相反，在快速加热（1000 K / min）时，低温预恢复似乎可以忽略不计。因此，有足够的存储能量用于在较高温度下快速重结晶。讨论了加热速率对钼再结晶行为的影响。

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  • 来源
    《Materials Science and Engineering》 |2012年第15期|p.316-324|共9页
  • 作者

    S.Primig; H.Leitner; W. Knabl; A.Lorich; H.Clemens; R.Stickler;

  • 作者单位

    Christian Doppler Laboratory for Early Stages of Precipitation, Montanuniversitat Leoben, Austria Department of Physical Metallurgy and Materials Testing, Montanuniversitat Leoben, Austria;

    Christian Doppler Laboratory for Early Stages of Precipitation, Montanuniversitat Leoben, Austria,Department of Physical Metallurgy and Materials Testing, Montanuniversitat Leoben, Austria;

    PLANSEE SE, Reutte, Austria;

    PLANSEE SE, Reutte, Austria;

    Department of Physical Metallurgy and Materials Testing, Montanuniversitat Leoben, Austria;

    University of Vienna, Austria;

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  • 正文语种 eng
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  • 关键词

    molybdenum; heating rate; recovery; recrystallization; hardness; EBSD;

    机译：钼;加热速率复苏;重结晶硬度;欧洲可持续发展委员会;

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