Interplay between dislocation glide and ω precipitation in a Ti–15Mo alloy investigated by TEM

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 870; p. 144855
• Main Authors: Xiao, J.F., Nie, Z.H., He, B.B., Tan, C.W.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 12-04-2023
• Subjects: Dislocation band; Titanium alloy; Transmission electron microscopy; ω precipitations; Titanium alloy; ω precipitations; Dislocation band; Transmission electron microscopy
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2023.144855

The mechanical response of ω precipitations in a Ti–15Mo alloy during compression test is investigated by transmission election microscopy (TEM) observation. The interaction between the dislocation slips and ω precipitations was focused, by which some of the ω variants were absent, while others were detected, in deformation bands. Two mechanisms including the shear and the disordering mechanisms are proposed to uncover the underlying mechanisms of mechanical responses of ω precipitations. This understanding will provide new insight onto the strengthening strategy and alloy design of titanium.