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- Title
Influence from Size and Morphology of Mn<sub>5</sub>Si<sub>3</sub> on Wear Resistance of Cu-Zn-Al-Mn-Si Alloys.
- Authors
Lin, Y. H.; Chuang, W. S.; Chang, C. M.; Huang, J. C.; Chao, C. Y.
- Abstract
In this study, the microstructure, hardness, and wear resistance of two kinds of copper alloy are demonstrated to be affected by both composition, annealing temperature, and phases present with a sliding block-on-ring test, where the ring is 316 stainless steel. With a higher content of Zn, the solubility of Mn and Si would decrease, resulting in increased volume fraction of the hard ω-Mn5Si3 phase (with a high nanoindentation hardness of 12.9 GPa). Moreover, the higher contents of Mn and Si lead to the formation of large primary polyhedron Pω-Mn5Si3 cylinders during solidification. With the help of two-stage forging, the primary polyhedron Pω-Mn5Si3 grow along [0001], enabling the large primary Mn5Si3 cylinders all parallel to each other. This special microstructure could significantly improve the wear resistance in comparison with the samples with a microstructure containing only small and randomly oriented precipitates. Such parallel primary polyhedron Pω-Mn5Si3 cylinders can act as reinforcements to grab the matrix, effectively improving the wear resistance.
- Subjects
MANGANESE; SILICIDES; COPPER alloys; MICROSTRUCTURE; HARDNESS testing; WEAR resistance
- Publication
Metallurgical & Materials Transactions. Part A, 2019, Vol 50, Issue 7, p3148
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-019-05255-4