Accès ouvert
2025
article
OpenAlex
Ion Aurel Perianu, Alin Constantin Murariu, Iuliana Duma, Radu Popescu et autres
This case study focuses on the laboratory examination and material analysis of welded components in automotive production. The investigation included metallographic analyses, microstructural evaluations, and non-destructive testing methods to assess weld integrity. Key issues identified were the presence of thermal distortions, incomplete …
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Accès ouvert
2025
article
OpenAlex
Claudia Amalia Ciurel, Alin Constantin Murariu, Anca Lidia Borz
This paper presents an in-depth spectroscopic analysis of Al 2 O 3 -40%TiO 2 coatings deposited via HVOF thermal spraying on a 10CrMo9.10 heat-resistant steel substrate. The study aims to correlate the optoelectronic and structural properties of the coatings with their composition …
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Accès ouvert
2025
article
OpenAlex
Alin Constantin Murariu, Ion Aurel Perianu, Marius Cocard, Eneia Frici
The paper presents a systematic approach to optimize the HVOF deposition technology of Al 2 O 3 40 TiO 2 coatings for the protection of components in the energy industry. Key performance factors evaluated include scratch resistance, surface roughness, and friction coefficient, …
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Accès ouvert
2025
article
OpenAlex
Vlad Ștefan Constantin, Alin Constantin Murariu, Ion Aurel Perianu, Marius Cocard et autres
The paper presents an optimization approach for enhancing the hardness and adhesion of Al 2 O 3 -40%TiO 2 coatings produced by High-Velocity Oxi-Fuel (HVOF) thermal spraying, aimed at their application in protecting components subjected to aggressive environments and severe mechanical stresses …
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Accès ouvert
2024
article
OpenAlex
Alin Constantin Murariu, Iuliana Duma, Radu Nicolae Popescu
This paper presents a case study of an in-service failure occurred in a pressurized gas supply pipeline, which has been recurring in recent years, particularly during the winter season. The investigation focused on two pipe coupons extracted from a DN 300 pipeline, …
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Accès ouvert
2024
article
OpenAlex
Alin Constantin Murariu, Iuliana Duma, Ion Aurel Perianu
Fires can affect both civil and industrial buildings. Following a fire affecting a building or industrial structure, inspections are normally carried out to assess how the materials used in the construction have deteriorated and the severity of this phenomena. Emphasis is put …
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Accès ouvert
2024
article
OpenAlex
Emilia Dobrin, Alin Constantin Murariu
The escalating demand for advanced structural materials with superior wear and corrosion resistance in aeronautical and military applications has spurred interest in amorphous alloys, particularly metallic glasses, due to their non-crystalline atomic configurations and exceptional mechanical properties. High-Velocity Oxygen Fuel (HVOF) spraying, …
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Accès ouvert
2024
article
OpenAlex
Vlad Denis Constantin, Alin Constantin Murariu, Ion Aurel Perianu, Iuliana Duma
This bibliographic research explores the field of renewable energy by exploiting the potential of the High Velocity Oxygen Fuel Deposition (HVOF) method, an advanced thermal spray coating technology. HVOF involves propelling powder particles at remarkable speeds onto material surfaces, providing a means …
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Accès ouvert
2024
article
OpenAlex
Ion Aurel Perianu, Alin Constantin Murariu, Lia-Nicoleta Botila, Matei Marin-Corciu et autres
The purpose of this article is to provide a comprehensive overview of the latest trends in abrasive waterjet cutting technologies and their current state of the art. The article will explore the basic principles of abrasive waterjet cutting and the process advantages …
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2023
article
OpenAlex
Matei Marin-Corciu, Nicuşor Alin Sîrbu, Alin Constantin Murariu, Marius Cocard et autres
Fiber-reinforced 3D printing filaments are composite materials compounded with short, chopped additives (in this paper case glass fibers) in a polymer matrix base. Engineering filaments and reinforced filaments have gotten a lot more popular in the last few years due to their …
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2023
article
OpenAlex
Sergiu Valentin Galaţanu, Iuliana Duma, Cosmin Florin Popa, Alin Constantin Murariu et autres
The paper presents an experimental investigation of the impact properties and imperfections of the 3D printed Al4043A aluminium-silicium alloy using wire-arc additive manufacturing. Using an experimental program based on factorial experiments, correlations between the main WAAM process parameters and the related properties …
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2023
article
OpenAlex
Alin Constantin Murariu, Marius Cocard, Alexandru Adrian Geana, G. Socol
This paper presents the results of factorial experiment applied to optimize Matrix‑Assisted Pulsed Laser Evaporation (MAPLE) and Pulsed Laser Deposition (PLD) coating technologies used to improve the corrosion resistance of steels. MnTa2O6 pseudo-binary oxides and 5,10-(4-carboxy-phenyl)-15,20-(4-phenoxy-phenyl)-porphyrin was used for these experiments to …
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