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Direct measurements of Rayleigh wave acoustoelastic constants for shot-peened superalloys
NDT & E International ( IF 4.2 ) Pub Date : 2020-04-18 , DOI: 10.1016/j.ndteint.2020.102279
Sergey Gartsev , Bernd Köhler

In this article, the experimental investigation of the dependency of surface wave (Rayleigh wave) acoustoelastic constants (AEC) on surface treatment parameters and plastic deformation is discussed. These constants are necessary for the monitoring of surface treatment intensity by means of ultrasonic testing. The indirect (mapping of bulk wave AEC to the surface wave AEC through the Grüneisen constants) method and the direct method are compared. Also the Rayleigh wave AEC have been directly measured for the different states of material (annealed, plastically deformed, or surface treated) for In718 and Ti6246 alloys. We show that surface AEC are very sensitive to any changes in material structure, up to changes in the sign of the effect, and for practical applications, the direct in-situ Rayleigh wave AEC measurement should be performed.



中文翻译:

直接测量喷丸超合金的瑞利波声弹性常数

本文讨论了表面波(瑞利波)声弹常数(AEC)对表面处理参数和塑性变形的依赖性的实验研究。这些常数对于通过超声测试监测表面处理强度是必需的。比较了间接方法(通过Grüneisen常数将体波AEC映射到表面波AEC)和直接方法。此外,还针对In718和Ti6246合金的材料的不同状态(退火,塑性变形或表面处理)直接测量了瑞利波AEC。我们表明表面AEC对材料结构的任何变化都非常敏感,直到影响的迹象发生变化为止,对于实际应用,应执行直接原位瑞利波AEC测量。

更新日期:2020-04-18
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