Tooling reliability is critical to welding success in friction stir welding, but tooling fatigue is not well understood because it occurs in conditions that are often unique to friction stir welding. A fatigue study was conducted on a commonly used tooling material, H13 tool steel, using constant stress loading at temperatures between 300°C and 600°C, and the results are presented. A model is proposed accounting for temperature and stress effects on fatigue life, utilizing a two-region Arrhenius temperature model. A transition in temperature effect on fatigue life is identified. Implications of the temperature effect for friction stir welding suggest that tooling fatigue life dramatically decreases above 500°C and accelerated testing should be conducted below 500°C.
College and Department
Ira A. Fulton College of Engineering and Technology; Mechanical Engineering
BYU ScholarsArchive Citation
Jones, Bradley Valiant, "Temperature and Stress Effect Modeling in Fatigue of H13 Tool Steel at Elevated Temperatures with Applications in Friction Stir Welding" (2015). Theses and Dissertations. 4442.
friction stir welding, H13 tool steel, Arrhenius model, elevated temperature fatigue, reliability, accelerated testing