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Assessment of structure and selected mechanical properties of braze welded joints of copper‑lined steel tubes

Mirski Zbigniew, Wojdat Tomasz, Hejna Jan

Archives of Civil and Mechanical Engineering

2020

Vol. 20, no. 1

157--167

In the paper, results of a research on braze welded joints of copper-lined 10CrMo9-10 (10H2M) steel tubes made by CMT arc braze welding are presented. As a filler metal, silicon bronze was applied. Results of metallographic examinations with the use of light microscopy, electron scanning microscopy and X-ray microanalysis are presented. Mechanical properties of the joints were assessed on the grounds of static tensile test, technological bending test, as well as hardness measurements. Quality of the obtained joints was good. No cracks were observed in the brazed joints and the obtained mechanical properties were satisfactory.

Cu-etp copper monotonic tensile test modeling in ls-dyna software using hardening and damage models

Burak M., Pejkowski Ł., Skibicki D., Stopel M.

Journal of Polish CIMEEAC

2015

Vol. 10, no 1

23--28

This paper deals with modeling of monotonic tensile test of Cu-ETP copper in numerical environment using finite element method. The research aims to verify the capabilities of LS-Dyna software in terms of modeling the strain hardening and damage of the material. The numerical analyses were proceeded by experimental tests to determine the materials constants of isotropic hardening model and constant required for modeling of material’s damage. Determined material constants were implemented into LS-Dyna environment using MAT_Damage_3 material model. The specimen model was built using eight-node hexahedrons. Both in case of experimental and numerical tests, the controlled parameter was displacement of the specimen. Obtained strain-stress curves were analyzed and conclusions were drawn.