Very high cycle fatigue properties at 973 K of additively manufactured and conventionally processed intermetallic TiAl 48-2-2 alloy

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 862; p. 144507
• Main Authors: Schmiedel, Alexander, Burkhardt, Christina, Rudolph, Sebastian M., Weidner, Anja, Biermann, Horst
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 18.01.2023; Elsevier BV
• Subjects: Additive manufacturing; Crack initiation; Crack propagation; Electron beams; Fatigue life; Fatigue strength; Fatigue tests; Gamma TiAl alloys; Grain size; Heat treating; Heat treatment; High cycle fatigue; High temperature; High-temperature materials; Hot isostatic pressing; Intermetallic compounds; Melting; Metal fatigue; Microstructure; Powder beds; Short cracks; Titanium aluminides; Titanium base alloys; Ultrasonic testing; Vacuum arc melting; Very high cycle fatigue; Very high cycle fatigue; Additive manufacturing; Gamma TiAl alloys; High-temperature materials

The fatigue lives of 2nd generation γ-TiAl alloy Ti–48Al–2Cr–2Nb manufactured both by additive manufacturing using electron beam powder bed fusion (EB-PBF) as well as conventional casting process by vacuum arc remelting for comparison (REF) were investigated. Both batches (EB-PBF and REF) were subje...