2022/03/04 by Mirko Teschke, Teschke, M., J. Moritz +9
Engineering · Materials Science · #Additive Manufacturing Materials and Processes #Applied Physics (physics.app-ph) #FOS: Physical sciences #Intermetallics and Advanced Alloy Properties #Materials Science (cond-mat.mtrl-sci) #Titanium Alloys Microstructure and Properties
paper · pdf · doi:10.48550/arxiv.2203.02260
openalex publication_date 2022/03/04 · openalex created_date 2022/08/27 · openalex updated_date 2026/07/28
The additively manufactured titanium aluminide alloy TNM-B1 was characterized microstructurally and mechanically in the as-built and hot isostatically pressed (HIP) condition. Tensile and constant amplitude tests were performed at room temperature and 800 °C. Using fractographic SEM images, the fracture-inducing defect was identified. With the HIP, defect number and size could be reduced, increasing fatigue strength by 43% to 500 MPa. Using the model approaches of Murakami and Shiozawa, the fatigue life was correlated with the local stress intensity factor and could be described as function of the stress amplitude as well as the size and location of fracture-inducing defects.