Related Experiment Video
Updated: Feb 28, 2026

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
Published on: September 23, 2018
Enhanced Strength-Ductility Synergy of Fine-Grained AlCoCrFeNi High-Entropy Alloy Prepared by Heavy Hot Deformation
Sujun Lu1, Jingou Yin2, Zhenyu Dou2
1State Key Laboratory of Ni&Co Associated Minerals Resources Development and Comprehensive Utilization, Jinchang 737100, China.
Abstract:
The mechanical properties of the AlCoCrFeNi high-entropy alloy (HEA) can be significantly enhanced by grain refinement. However, it is difficult to refine the grain size of AlCoCrFeNi HEA by solidification methods. In this study, fine-grained AlCoCrFeNi HEA was successfully prepared by heavy thermal mechanical processing. The AlCoCrFeNi HEA consists of FCC, B2, and BCC phases. The FCC phase is distributed on grain boundaries, while the B2 phase is embedded in the BCC matrix within the grains. The fine-grained AlCoCrFeNi HEA has enhanced strength and ductility compared with its coarse-grained counterpart. The enhanced strength-ductility synergy of the fine-grained AlCoCrFeNi HEA is attributed to three key factors: the fine-grained microstructure, the delayed initiation of cracks within the hard-to-deform grain matrix, and the impediment of crack propagation by the grain boundaries enriched with the FCC phase.
Related Concept Videos
Strength and Heat of Hydration
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
Stress-Strain Diagram - Ductile Materials
Yield Criteria for Ductile Materials under Plane Stress
The Maximum Shearing Stress Criterion, also known as...
Mechanical Characteristics of Steel
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....

