Failure Case Study Series Part Three: Investigation of Wear and Failure Mechanisms in Heavy-Duty Gear Coupling - GURĂU, Liviu; MARIN, Florin; MARIN, Mihaela; ȘTEFĂNESCU, Cristian; GURĂU, Gheorghe (The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2026)