CREEP CHARACTERIZATION OF SUPERALLOY IN-738 USING ULTRASONIC NONLINEARITY MEASUREMENT

被引：12
作者：
Kim, Chung Seok [1 ]
Hyun, Chang Young [2 ]
Jhang, Kyoung Young [1 ]
机构：
[1] Hanyang Univ, Seoul 133791, South Korea
[2] Seoul Natl Univ Sci & Technol, Seoul 139743, South Korea
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2011年 / 25卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Nickel-based superalloy; creep; precipitate; nonlinearity; ultrasonic; EQUATION-OF-STATE; HIGH-PRESSURE; TRANSITION-METALS; 1ST-PRINCIPLES CALCULATIONS; THERMODYNAMIC PROPERTIES; ELASTIC-CONSTANTS; TOTAL ENERGIES; TANTALUM; TUNGSTEN; BAND;
D O I：
10.1142/S0217979211100011
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The higher harmonic generation technique has been presented to investigate the creep characteristics of nickel-based superalloy. The primary gamma' precipitates became coarsened preferentially in the direction perpendicular to the applied stress axis during the creep deformation and the Vickers hardness decreased with creep time due to loss of interfacial strain between gamma matrix and gamma' precipitate. The increase in ultrasonic nonlinearity with increasing creep time is discussed in relation to the directional coarsening of the gamma' precipitates, which was closely related to the scattering and distortion of the ultrasonic wave.
引用
收藏
页码：1385 / 1407
页数：23
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