Post by Olavo Haase

🎉 Our new paper is out in Materials Today Communications! "Effect of short-term annealing on the microstructure and tensile behaviour of high-strength Ni-free Cr-Mn-(C+N) austenitic stainless steel processed by PBF-LB/M" We investigated whether rapid heat treatments (as short as 1 minute!) can replace conventional solution annealing for additively manufactured Ni-free austenitic stainless steels — relieving residual stresses and reducing dislocation density while preserving the beneficial PBF-LB/M microstructure. Key findings: → Near-complete stress relief and significant dislocation density reduction without significant grain growth → The 1200°C/1 min condition achieved ductility comparable to conventional 30-minute annealing → The 1100°C/3 min condition showed enhanced strain hardening, pointing to distinct deformation mechanisms → Fully austenitic microstructure maintained in all conditions This is my first publication in the context of my PhD, and it has made me even more excited for the chapters ahead! Thank you so much to my co-authors Felix Großwendt, Santiago Benito, and Prof. Sebastian Weber and to all the team from Lehrstuhl Werkstofftechnik der Ruhr-Universität Bochum at Ruhr University Bochum, as well as to my PhD program IMPRS SusMet | SurMat for all the support. 📄 Full paper (open access): https://lnkd.in/djKi6_TW --- 🎉 Nosso novo artigo foi publicado na Materials Today Communications! Investigamos se tratamentos térmicos rápidos (de apenas 1 minuto!) podem substituir o recozimento convencional em aços inoxidáveis austeníticos sem níquel produzidos por manufatura aditiva. Principais resultados: → Alívio quase completo de tensões residuais e redução da densidade de discordâncias sem crescimento significativo de grão → 1200°C/1 min: ductilidade comparável ao recozimento convencional de 30 minutos → 1100°C/3 min: maior taxa de encruamento, indicando mecanismos de deformação distintos → Microestrutura totalmente austenítica em todas as condições Esta é minha primeira publicação no doutorado, e estou animado para os próximos capítulos! Muito obrigado aos coautores Felix Großwendt, Santiago Benito e Prof. Sebastian Weber, e à Ruhr-Universität Bochum e ao IMPRS SusMet pelo suporte. 📄 Acesso aberto: https://lnkd.in/djKi6_TW