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ASTM E664-1993(2005)  用浸渍法测量纵向超声波的表面衰减的标准操作规程

标准编号:ASTM E664-1993(2005)
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中文标准名称:用浸渍法测量纵向超声波的表面衰减的标准操作规程
英文标准名称:Standard Practice for the Measurement of the Apparent Attenuation of Longitudinal Ultrasonic Waves by Immersion Method
标准状态:Withdrawn
复审确认日期:2005
代替标准号:ASTM E 664-1978
语言:英文版,中文版
发布日期:1993
实施日期:1993-09-15
标准类别:美国材料与试验协会ASTM
中国标准文献分类法(中标分类CCS):环境保护 >> 环境保护采样、分析测试方法 >> 噪声、振动测试方法
标准页数:3P.;A4 页
起草单位:E07.06
引用标准:ASTM E1316;ASTM E214;ASTM E317
标准简介:

The measurement of apparent attenuation in materials is useful in applications such as the comparison of heat treatments of different lots of material or the assessment of the degradation of materials due to environment.

Several different modes of wave vibration can be propagated in solids. This practice is concerned with the attenuation associated with longitudinal waves introduced into the specimen by the immersion method.

This practice allows for the comparison of the apparent attenuations of geometrically similar specimens.

For the determination of apparent attenuation, the procedures described herein are valid only for measurements in the far field of the ultrasonic beam.

1.1 This practice describes a procedure for measuring the apparent attenuation of ultrasound in materials or components with flat, parallel surfaces using conventional pulse-echo ultrasonic flaw detection equipment in which reflected indications are displayed in an A-scan presentation.

1.2 The measurement procedure is readily adaptable for the determination of relative attenuation between materials. For absolute (true) attenuation measurements, indicative of the intrinsic nature of the material, it is necessary to correct for specimen geometry, sound beam divergence, instrumentation, and procedural effects. These results can be obtained with more specialized ultrasonic equipment and techniques.

1.3 The values stated in inch-pound units are to be regarded as the standard.

1.4 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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添加时间:2012/11/23
 
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