Romeo-Gabriel CHELARIU

Dr. Romeo-Gabriel CHELARIU


Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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11 December 2024 in Applied Sciences
Verified
Journal Article
Open access
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Alin Marian CazacAlin Marian Cazac
Alin Marian Cazac
RCRomeo-Gabriel CHELARIU
Romeo-Gabriel CHELARIU
Ramona CimpoesuRamona Cimpoesu
Ramona Cimpoesu
MBMihai-Adrian Bernevig
Mihai-Adrian Bernevig
Marcelin BencheaMarcelin Benchea
Marcelin Benchea
Costica BejinariuCostica Bejinariu
Costica Bejinariu
A new non-sparking metallic material, Cu-Ti, with applications in potentially explosive environments is proposed as an alternative to CuBe, to reduce the processing and toxic effects of Be. Using high-purity Cu and Ti materials, a Cu (~3–4 wt%) Ti alloy with good chemical and structural homogeneity was fabricated in an induction furnace under an Ar atmosphere. The hot-rolled material was tested in an explosive gas mixture (10% H2 or 6.5% CH4) under extremely severe wear tests for 15,000 cycles, and no hot sparks were produced to ignite the medium. The material was investigated as hot-rolled plates (600 s at 950 °C and 10% reduction). The microstructures and surface of the wear test samples were investigated by light optical microscopy (LOM) and scanning electron microscopy (SEM). The chemical compositions were determined by energy dispersive spectrometry (EDS). The corrosion behavior was studied using electrochemical techniques: open-circuit, linear, and cyclic potentiometry in saline electrolyte solutions. The mechanical properties, such as microhardness and friction coefficient, were determined using UMT equipment. The results showed that the alloy is suitable for applications requiring non-ignition properties, with good hot rolling deformability and chemical composition homogeneity. Regarding the corrosion analysis and mechanical properties of the experimental CuTi alloy, minor differences were observed between the cast- and hot-rolled material.