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About

Denis Thibault is a materials engineer whose research has made meaningful contributions to the field of residual stress analysis in welded steel structures and surface treatment technologies. His work centers on understanding how mechanical post-weld treatment processes — particularly hammer peening — influence the stress states of structural steels, with important implications for fatigue life and structural integrity. Thibault's most cited work, a 2009 comparative study of residual stresses in hammer-peened, multi-pass welds across high-strength steels A514 (S690Q) and S41500, has garnered 22 citations and remains a key reference for engineers working with weld improvement techniques. His earlier research, conducted in collaboration with Hydro-Québec's research institute (IREQ), helped pioneer the robotization of hammer peening using the Scompi robotic platform — a significant advancement that brought greater precision and repeatability to an industrial process previously reliant on manual application. Through strain gauge measurements and systematic studies of impact energy levels, Thibault has helped establish a clearer mechanistic understanding of how hammer peening generates compressive residual stresses. His work bridges experimental materials science and practical industrial application, making it valuable for engineers designing fatigue-resistant welded structures in energy and heavy industry sectors.