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Ultrasonic evaluation method for density and porosity of powder high-temperature alloy

An evaluation method and technology for superalloys, which are applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, and processing response signals of detection, which can solve the problems of non-destructive testing and low efficiency. , to achieve the effect of non-destructive testing and quality control

Inactive Publication Date: 2020-02-21
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing density and porosity measurement mainly adopts the Archimedes drainage method, which requires sampling for detection, which cannot achieve non-destructive testing and is inefficient;

Method used

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  • Ultrasonic evaluation method for density and porosity of powder high-temperature alloy
  • Ultrasonic evaluation method for density and porosity of powder high-temperature alloy

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Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 , figure 2 As shown, the density and porosity detection steps of FGH95 superalloy are as follows:

[0021] 1.1 Sample requirements and thickness measurement

[0022] Process two opposite parallel planes on the sample, and use a vernier caliper or micrometer to measure the distance h between the two parallel planes;

[0023] 1.2 Connecting Devices

[0024] Using a pulse signal generator or ultrasonic detector, connect the output interface and synchronous interface of the pulse signal generator or ultrasonic detector with the input interface and synchronous interface of the oscilloscope respectively through coaxial cables; Connect the probe directly to the transmitting / receiving interface of the pulse signal generator or ultrasonic detector; install the probe on a parallel plane of the sample, and use engine oil or glycerin for good coupling;

[0025] 1.3 Measure transit time and calculate sound velocity

[0026] Use an oscilloscope to measure the t...

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Abstract

The invention belongs to the field of nondestructive detection and relates to an ultrasonic evaluation method for density and porosity of powder high-temperature alloy. According to the method, the relation curve of density and sound velocity of the powder high-temperature alloy and the relation curve of porosity and the sound velocity are established, the method for evaluating the density and theporosity of the powder high-temperature alloy through the sound velocity is provided, and the ultrasonic nondestructive evaluation of the density and the porosity of the powder high-temperature alloyis achieved.

Description

technical field [0001] The invention relates to an ultrasonic evaluation method for powder superalloy density and porosity, belonging to the field of non-destructive testing. Background technique [0002] The powder superalloy needs to go through atomization pulverization, hot isostatic pressing and other processes in the preparation process. Microstructure analysis shows that there may be a certain number and size of voids in the powder superalloy, which seriously reduces its plasticity and fatigue life. The density of the powder superalloy The non-destructive evaluation method of porosity and porosity is of great significance for its quality control. The existing density and porosity measurement mainly adopts the Archimedes drainage method, which requires sampling for detection, which cannot achieve non-destructive testing and is inefficient; Contents of the invention [0003] The present invention designs a kind of ultrasonic evaluation method of powder superalloy dens...

Claims

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Application Information

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IPC IPC(8): G01N29/07G01N29/28G01N29/44
CPCG01N29/07G01N29/28G01N29/44G01N2291/011G01N2291/0234G01N2291/02818G01N2291/0289
Inventor 梁菁沙正骁王铮史丽军林立志王晓
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS