INFLUENCE OF THE UPSETTING RATIO ON MICROHARDNESS IN HYDROMECHANICALLY BULGED AXISYMMETRIC COMPONENTS MADE FROM COPPER TUBES

1 MIŁEK Tomasz
Institution:
1 Kielce University of Technology, Faculty of Mechatronics and Mechanical Engineering, Department of Applied Computer Science and Armament Engineering, Kielce, Poland, EU, tmatm@tu.kielce.pl
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
446-451
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
112 views / 33 downloads
Abstract

The paper presents experimental results that concern hydromechanical bulging of copper axisymmetric components whose relative wall thickness was s0/D= 0.045. The specimens used in investigations were segments of copper tubes having the outer diameter D= 22 mm and wall thickness s0 = 1 mm. In the paper, the deformation ratio of material was defined as the relative upsetting ratio l/l0 (where l – the punch displacement, l0 – the initial length of tube). The investigations aimed to determine the impact of the upsetting ratio on microhardness in different zones of hydromechanically bulged axisymmetric components. The measurements of microhardness were taken with the Matsuzawa Seiki Co. MMT-X3 Vickers micro-hardness tester. The paper gives the comparison of the microhardness distributions in longitudinal sections of hydromechanically bulged copper axisymmetric components with different relative ratios l/l0=0.054÷0.109.

Keywords: Hydromechanical bulge forming, hydroforming, axisymmetric components, microhardness

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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