Complex soldered joints are used in the manufacture of rocket elements, such as liquid-propellant rocket engines (LRE) NDT technology development for soldered joints is complex due to the design features of the rocket elements. The most difficult defects to identify in the soldered joints of the combustion chambers are solder skips. The minimum area of solder skip that needs to be identified is 1 mm2. The transverse size of the solder skips may reach several microns according to preliminary estimates. The laser ultrasonic testing method is proposed for quality control of the manufacture of soldered joints of LRE combustion chambers. Mathematical modelling of the testing process was undertaken in this research Several series of experiments on the detection of solder skips were also carried out. These experiments showed the possibility that the laser ultrasonic method could detect solder skips with an area of 1 mm2 and more, and a transverse size of 0.02 mm. It is also possible to detect cracks in the ribs in the horizontal direction with a length of 0.5 mm or more The reliability of the test is confirmed by the results of metallographic analysis.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Laser ultrasonic method for the defectoscopy of soldered joints of liquid-propellant rocket engines


    Contributors:

    Published in:

    Insight ; 57 , 4 ; 201-205


    Publication date :

    2015


    Size :

    5 Seiten, Bilder, Tabellen, 7 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Introduction to Liquid-Propellant Rocket Engines

    Huang, David H. / Huzel, Dieter K. | AIAA | 1992


    Design of Liquid Propellant Rocket Engines

    D. H. Huang / D. K. Huzel | NTIS | 1967


    Design of liquid-propellant rocket engines

    Partola, I. S. | British Library Online Contents | 2012


    Liquid Propellant Rocket Engines in Germany

    Sutton, George P. | AIAA | 2006