Effect of Al additions on the microstructures and tensile properties of AlxCoCr3Fe5Ni high entropy alloys
Document Type
Journal Article
Publication Title
Materials Characterization
Volume
175
Publisher
Elsevier
School
School of Engineering
RAS ID
36201
Funders
Australian Research Council Discovery Projects
National Natural Science Foundation of China
Abstract
AlxCoCr3Fe5Ni high entropy alloys with varying aluminum contents (x = 0, 0.1, 0.2 and 0.3) were synthesized by induction melting and casting method. The microstructures and tensile properties of the new HEAs were investigated. Different regions of CoCr3Fe5Ni matrix HEA have different microstructures. With the increase of Al content, the microstructure changes from dendrite to lamellar eutectic and dual-phase structure comprising FCC and BCC phases was found in all four samples with different ratios. The volume fraction of BCC phase increased. The ultimate tensile strength (UTS) of the alloy increased, with the highest UTS (1018.9 MPa) achieved at x = 0.3 in this work. On the other hand, increasing Al content further induced distortion of the crystalline lattice and enhanced the alloy strength.
DOI
10.1016/j.matchar.2021.111091
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Comments
Zhang, J., Qiu, H., Zhu, H., & Xie, Z. (2021). Effect of Al additions on the microstructures and tensile properties of AlxCoCr3Fe5Ni high entropy alloys. Materials Characterization, 175, article 111091. https://doi.org/10.1016/j.matchar.2021.111091