APPLICATION OF ULTRASOUND AND RADIOGRAPHIC METHODS OF NON-DESTRUCTIVE CONTROL FOR QUALITY ASSESSMENT OF METAL PRODUCTS OF ADDITIVE PRODUCTION

Abstract

Purpose. Find out the possibilities of using acoustic and radiographic methods of non-destructive testing to detect defects in products of electron beam surfacing made of titanium, steel, tungsten, molybdenum and bronze, as well as to determine optimal technologies and control parameters.

Methodology. Comparative control of the acoustic research was carried out by contact transducers, longitudinal (compression) ultrasonic waves of the following frequencies/diameters of the working surface: 2 MHz/24 mm; 2.5 MHz/10mm and 5 MHz/14mm. The radiographic examination was carried out using the technology of classic film radiography and DR (digital direct radiography).

Findings. It is shown that ultrasonic and radiation control methods allow to assess the quality of products of additive technologies in accordance with regulatory documents.

Originality. Based on the research results, recommendations were made regarding the use of non-destructive testing methods to detect defects and mechanical properties of finished products.

Practical value. The use of modern ultrasonic flaw detectors with phased antenna arrays (PHAs), with the simultaneous use of TFM (Total Focusing Method) and FMC (Full Matrix Capture) modes to detect defects of arbitrary orientation located at different depths is promising for researching the quality of products of additive technologies.