Influence of β grain size on tensile behavior and ductile fracture toughness of titanium alloy Ti-10V-2Fe-3Al

• Published in: Metallurgical and materials transactions. A, Physical metallurgy and materials science Vol. 37; no. 5; pp. 1423 - 1433
• Main Authors: BHATTACHARJEE, A, VARMA, V. K, KAMAT, S. V, GOGIA, A. K, BHARGAVA, S
• Format: Journal Article
• Language: English
• Published: New York, NY Springer 01-05-2006
• Subjects: Applied sciences; Exact sciences and technology; Fractures; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Grain size; Size effect; Mechanical properties; Tensile property; Ductile fracture; Microstructure; Fracture toughness
• ISSN: 1073-5623; 1543-1940
• DOI: 10.1007/s11661-006-0087-x

The beta grain size of the alloy Ti-10V-2Fe-3Al was varied by heat treatment, and the tensile behavior and fracture toughness were evaluated as a function of beta grain size at room temperature. The alloy showed stress-induced martensitic transformation, and the triggering stress for this transformation varied with grain size. The 0.2 pct yield stress exhibited a Hall-Petch relationship with grain size. The ductile fracture toughness was found to increase with decrease in grain size, and it was also shown to follow a Hall-Petch kind of relationship. The grain boundary and the stress-induced martensitic contribution to fracture toughness were separated out.