Dynamic tensile deformation of Al0.1Ti0.1CoCrFeNi high entropy alloy with heterogeneous grain structure

Document Type

Journal Article

Publication Title

Journal of Alloys and Compounds

Publisher

Elsevier

School

School of Engineering

RAS ID

61900

Funders

National Natural Science Foundation of PR China / Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, PR China

Comments

Tian, Z., Zhang, T., Wang, Z., Xie, Z., & Fang, F. (2023). Dynamic tensile deformation of Al0.1Ti0.1CoCrFeNi high entropy alloy with heterogeneous grain structure. Journal of Alloys and Compounds, 968, article 172092. https://doi.org/10.1016/j.jallcom.2023.172092

Abstract

The single-phase Al0.1Ti0.1CoCrFeNi high-entropy alloy (HEA) with heterogeneous grain structure was processed through cold rolling followed by annealing at 1073 K. The mechanical behaviors of this HEA under quasi-static (10−3 10−1 s−1) and dynamic (1200 3000 s−1) uniaxial tension were investigated. A combination of high tensile strength and large fracture strain was achieved. Specifically, the yield strength and ultimate tensile strength were increased from 381 MPa and 1000 MPa at 10−3 s−1 to 590 MPa and over 1200 MPa at a strain rate of 3000 s−1, respectively. Meanwhile, the engineering fracture strain of the HEA increased from 43 % to 62 % with increasing strain rate. Under dynamic tension, a high density of dislocations, together with numerous deformation twins and stacking faults, inside the fine grains contributed to the simultaneous improvement of the tensile strength and ductility. © 2023 Elsevier B.V.

DOI

10.1016/j.jallcom.2023.172092

Access Rights

subscription content

Link to Full Text

Share

 
COinS