Ductile ultrafine-grained Ti-based alloys with high yield strength

Authors

Lai-Chang Zhang, IFW DresdenFollow
Hai-Bo Lu, IFW DresdenFollow
Christine Mickel, IFW Dresden
Jurgen Eckert, IFW Dresden

RIS ID

26814

Publication Details

Zhang, L. Chang., Lu, H. Bo., Mickel, C. & Eckert, J. (2007). Ductile ultrafine-grained Ti-based alloys with high yield strength. Applied Physics Letters, 91 (5), 051906-1-051906-3.

Abstract

The authors report on ductile ultrafine-grained (Ti_0.72Fe_0.28)_100−xTa_x (0 ⩽ x ⩽ 4) alloys with not only high fracture strength but simultaneously high yield strength exceeding 2000 MPa along with distinct plasticity, which are superior to high-strength Ti-based bulk metallic glasses and bimodal composites. All alloys mainly consist of β-Ti and FeTi solid solutions but display different microstructures. The alloys exhibit a high fracture strength >2500 MPa and a high yield strength >2000 MPa as well as large plasticity of ∼ 5%–7.5%. The microstructure-property correlation of these ultrafine-grained alloys is discussed.