摘要
对大厚度钛合金锻件不同厚度的横截面及纵剖面切片试样进行了金相观察,应用超声接触法和水浸法检测了不同厚度试样的衰减和杂波水平。进而分析认为大厚度钛合金锻件远场区厚度影响杂波评定水平的两个主要途径为:远场区的声束扩散和主声束与声轴线的声压分布随厚度的相对变化。分析结果为大厚度钛合金锻件远场区超声检测方案的确定和超声检测标准的制定提供了依据。
By metallographic observation of the large titanium alloys forging with different thicknesses on cross section and vertical section,and through detecting the bottom attenuation and noise level of various thickness of the samples by conventional ultrasonic testing method and water immersion method,the reason that the noise level of the Large forging in the far field increased with the thickness was analyzed.The results show that the most important mechanism for the influence of thickness on noise level is that the beam divergence in the far field and the ultrasonic pressure distribution on the main beam and the beam axis varies with the thickness,which provides the basis for determining the ultrasonic detection scheme and setting the ultrasonic detection standards of the large TC4 titanium alloys forging.
出处
《无损检测》
2014年第9期14-18,24,共6页
Nondestructive Testing
关键词
钛合金
超声检测
杂波水平
厚度
声束扩散
Titanium alloys
Ultrasonic testing
Noise level
Thickness
Beam divergence
