Experimental Study at the Phase Interface of a Single-Crystal Ni-Based Superalloy Using TEM.
Experimental Study at the Phase Interface of a Single-Crystal Ni-Based Superalloy Using TEM.
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DOI：
10.3390/ma15196915
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发表时间：
2022-10-05
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影响因子：
--
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中科院分区：
文献类型：
--
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单晶镍基高温合金在高温下具有优异的机械性能，通常用于各种航空发动机和工业燃气轮机的涡轮叶片。针对第二代单晶镍基高温合金的相界面，在室温和高温下进行了原位TEM观察。进行强度比分析来测量两相界面宽度。采用改进的几何相分析方法，引入自适应掩模选择方法，用于相界面附近应变场的测量。应变不规则过渡区域与使用强度比分析计算的界面宽度一致。界面附近的强度比分析和应变测量可以相互印证和补充，有助于界面结构的评估。利用TEM原位加热和傅里叶变换，分析了单晶镍基高温合金两相界面附近γ相位错密度的变化。位错密度随着温度的升高首先降低，与金属淬火的特性一致，在450℃时急剧增加。还研究了高温位错密度变化与中温脆性之间的相关性。
The single-crystal Ni-based superalloys, which have excellent mechanical properties at high temperatures, are commonly used for turbine blades in a variety of aero engines and industrial gas turbines. Focusing on the phase interface of a second-generation single-crystal Ni-based superalloy, in-situ TEM observation was conducted at room temperature and high temperatures. Intensity ratio analysis was conducted for the measurement of two-phase interface width. The improved geometric phase analysis method, where the adaptive mask selection method is introduced, was used for the measurement of the strain field near the phase interface. The strained irregular transition region is consistent with the calculated interface width using intensity ratio analysis. An intensity ratio analysis and strain measurement near the interface can corroborate and complement each other, contributing to the interface structure evaluation. Using TEM in-situ heating and Fourier transform, the change of dislocation density in the γ phase near the two-phase interface of the single-crystal Ni-based superalloy was analyzed. The dislocation density decreases first with the increase in temperature, consistent with the characteristics of metal quenching, and increases sharply at 450 °C. The correlation between the variation of dislocation density at high temperatures and the intermediate temperature brittleness was also investigated.
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影响因子：
6.2
作者：
Ding, Qingqing;Shen, Zhenju;Zhang, Ze
通讯作者：
Zhang, Ze
DOI：
10.1002/pssa.200521039
发表时间：
2005-09-01
影响因子：
2
作者：
Häussler, D;Spiecker, E;Zwicker, G
通讯作者：
Zwicker, G
影响因子：
6
作者：
Meher, S.;Viswanathan, G. B.;Banerjee, R.
通讯作者：
Banerjee, R.
影响因子：
9.4
作者：
Mishin, Y
通讯作者：
Mishin, Y
影响因子：
4.7
作者：
Dirand, Laura;Cormier, Jonathan;Bastie, Pierre
通讯作者：
Bastie, Pierre