Precipitate Contribution to the Acoustic Nonlinearity in Nickel-Based Superalloy
Precipitate Contribution to the Acoustic Nonlinearity in Nickel-Based Superalloy
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DOI：
10.1088/0256-307x/26/8/086107
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发表时间：
2009-08
影响因子：
3.5
通讯作者：
C. Kim;C. Lissenden
中科院分区：
文献类型：
--
作者：
C. Kim;C. Lissenden
研究了γ′析出物对蠕变镍基高温合金声非线性的影响。蠕变过程中，立方γ′析出物在垂直于施加应力轴方向上优先粗化。随着蠕变时间的延长，γ′析出物的长度和形状因子增大。讨论了相对声非线性随蠕变寿命分数的增加而增加的现象，这与声波的散射和畸变密切相关。
The influence of γ' precipitate on the acoustic nonlinearity is investigated for a nickel-based superalloy, which is subjected to creep deformation. During creep deformation, the cuboidal γ' precipitate is preferentially coarsened in a direction perpendicular to the applied stress axis. The length and shape factor of the γ' precipitate increase with creep time. The increase of relative acoustic nonlinearity with increasing fraction of creep life is discussed in relation to the rafting of γ' precipitate, which is closely related to the scattering and distortion of the acoustic wave.