POPESCU Mihaela Politehnica University of Timisoara

Spoluautoři ROSU Radu Alexandru, LOCOVEI Cosmin, PERIANU Ion Aurel

Composite materials are specifically designed to respond to particular requirements in terms of mechanical strength and stiffness, corrosion resistance, resistance to chemical agents, low weight, dimensional stability, resistance to shock, wear properties, insulating and aesthetic, features which recommends this materials to be used in top fields of engineering (aeronautic, biomedical, etc.). These advanced materials present also an economic benefit, having a low weight together with high strength at high temperatures. Realization of these composites materials and joining them shows a high degree of complexity by combining aspects of material properties, functional needs, and a practical multifunctional development. The paper presents experimental data resulting from joining by CMT (Cold Metal Transfer) of metal matrix composites (aluminum) reinforced with steel mesh S235JR. The microscopic analyzes performed with optical microscopy and scanning electron microscopy presented not welding defects. It also notes that there were not been seen defects after examination in the cross-section of the composite material. The estimator values ΔHV0.1 determined between the areas base metal - weld of the joints shows that did not appeared structural hardening (ΔHV0.1<50%), which attest that will not appear important structural hardening, the risk of breaking fragile in these areas being considered low.

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