Affiliation:
1. School of Materials Science and Chemical Engineering, Xi’an Technological University, Xi’an 710021, China
2. School of Railway Equipment Manufacturing, Shaanxi Railway Institute, Weinan 714099, China
Abstract
The as-cast (Fe50Mn30Co10Cr10)97C2Mo1 HEA (high entropy alloy) was prepared and cold-rolled at 70%. Subsequently, annealing heat treatment at different temperatures (900 °C, 950 °C, 1000 °C) was carried out. The microstructure evolution and mechanical properties of the HEA were systematically investigated. The results showed that the HEA annealed at 900 °C and 950 °C exhibited uneven grain size and rich σ precipitation phase at grain boundaries. The grains began to grow and complete recrystallization, and no σ phases were observed in HEA annealed at 1000 °C, which resulted in a higher tensile strength of ~885 MPa and elongation of ~68% compared with other annealed HEAs. The higher volume fraction of annealing twins with 60°<111> orientation was produced in HEA annealed at 1000 °C, which enhanced the tensile strength and plasticity via the Twinning-induced plasticity (TWIP) mechanism.
Funder
National Key Research and Development Program of China
High-Level Talent Special Support Program Science and Technology Innovation Leading Talent Project of Shaanxi Provincial
Special Research Plan of the Department of Education of Shaanxi Province
the Research Plan Projects in Weinan city
Aeronautical Science Foundation of China
Subject
General Materials Science