Agricultural Engineering, Volume 49 (2017)

NON-DESTRUCTIVE TESTING OF JOINTS OF ANTIFRICTION PARTS CRIMPED BY PULSED MAGNETICDEFORMATION

Alexey Tatarinov, V. Mironov, D. Rybak, P. Stankevich
Riga Technical University

Abstract

Abstract: Possibilities of non-destructive testing (NDT) methods to assess the quality of permanent joints of powder metal parts were evaluated. Antifriction bushing-bushing couples used in transport braking systems were investigated. The parts made of bronze graphite were crimped by pulsed magnetic deformation by means of electromagnetic equipment with a maximum discharge energy of 30 kJ. The gap between joint parts in the couples was assessed by ultrasonic and radiographic methods. A standard ultrasonic flaw detector Krautkramer USM-25 with an Olympus 4MHzdual-element echo transducer and an industrial x-ray apparatus YXLON EVO 200D were used, correspondingly. In first trial, both methods were equally sensitive to tight and weak connection of joints, however, further studies are necessary to find quantitative estimations of the mechanical integrity. If not limited by the object size, the ultrasonic method is easier in application and can be standardized for use in production lines.

Keyword(s): powder metal joints, ultrasonic testing, radiography, electromagnetic crimping


References

C.Selcuk, S. Bond, P.Woollin, Joining processes for powder metallurgy parts: a review, Powder Metallurgy, 53 (1), 2010, p.7-11.

V.Mironovs, I.Boiko, M.Kolbe, Application of Pulse Electromagnetic Field for Joining of Powder Details, 9th International Conference "Mechatronic Systems and Materials (MSM-2013), Vilnius, 1-3.07.2013, Vilnius Gediminas Technical University, 2013, p.170-172.

D.Roach, K.Rackow, R.Duvall, C.Nelson, D.Moore, Nondestructive Inspection of Adhesive Metal-to-Metal Bonds, U.S. Automotive Materials Partnership Report DE-FC26- 02OR22910 on Project NDE601 to Department of Energy, Washington, D.C., December 2009.

R. D.Adams, P. Cawley, A review of defect types and nondestructive testing techniques for composites and bonded joints, NDT International, 21(4), 1988, p.208-222.

B. Raj, C.V.Subramanian, T.Jayakumar, Non-Destructive Testing of Welds (Woodhead Publishing Series in Welding and Other Joining Technologies), Alpha Science International Ltd., Oxford, 2000, 260 p.

ISO 16811:2014.Non-destructive testing. Ultrasonic testing. Sensitivity and range setting, 2014.

ISO 17636-1:2013. Non-destructive testing of welds -- Radiographic testing -- Part 1: X- and gamma-ray techniques with film, 2013.


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Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371

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