Deformation mechanisms of a nickel-based single-crystal superalloy during low-cycle fatigue at different temperatures

Deformation mechanisms of a nickel-based single-crystal superalloy during low-cycle fatigue at different temperatures
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镍基单晶高温合金不同温度低周疲劳变形机制

DOI:
10.1016/j.scriptamat.2014.11.026
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发表时间:
2015-04
期刊:
影响因子:
6
通讯作者:
C. Y. Jo
C. Y. Jo
中科院分区:
材料科学1区
文献类型:
--
作者:
X. G. Wang;J. L. Liu;T. Jin;X. F. Sun;Y. Z. Zhou;Z. Q. Hu;C. Y. Jo

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研究了一种镍基高温合金在不同温度下的低周疲劳变形机制。在760℃和900℃变形过程中,γ基体中观察到一种新的交叉滑移位错构型,这是900℃时滑移带的重要组成部分,在室温和900℃下观察到不同形态的滑移带,与明显的加工硬化相对应。观察到层错分布在整个γ/γ‘界面上。
Deformation mechanisms of an Ni-based superalloy during low-cycle fatigue at various temperatures were studied. A new configuration of cross-slip dislocation was observed in the γ matrix during the deformation at 760 and 900 °C, which is an important component of the slip band at 900 °C. Slip bands with different morphologies were observed at room temperature and 900 °C, corresponding to the obvious work-hardening. It was observed that stacking faults spread throughout the γ/γ′ interface.
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