2021 Volume 62 Issue 6 Pages 856-863
The ingots of CuxZnMnNi (x = 1, 2) medium-entropy (ME) brasses were fabricated using metallic mold-casting process without a vacuum chamber. The molten metal was obtained by high-frequency melting of the mixture of pure Cu, pure Ni, and pre-alloy ingots of Mn–Cu and Zn–Ni using silica-based crucible in Ar flow. The metallic mold-casting ingots were obtained using centrifugal casting in air atmosphere. The composite of body-centered-cubic (BCC) and face-centered-cubic (FCC) phases were obtained in the ingots of equiatomic CuZnMnNi ME brass, while a near-single FCC phase was obtained in the ingots of non-equiatomic Cu2ZnMnNi ME brass, where the identification of the constituent phases was mainly performed by XRD analysis. The ingots showed superior deformability and high 0.2% proof stress during compression test conducted at room temperature.
This Paper was Originally Published in Japanese in J. Japan Institute of Copper 59 (2020) 24–31. Minor corrections in abstract, main text, Figure and Table captions were performed with the translation from Japanese to English and proofreading by native speakers. Reference 43) was updated. An appendix containing figures based on the original and new experimental results has been added to the paper.
