Microstructural evolution and properties of a Cu–Cr–Ag alloy during continuous manufacturing process
| Autor: | Haofeng Xie, Xu-Jun Mi, Xiang-Qian Yin, Yang Zhen, Xue Feng, Gaolei Xu, Guo-Jie Huang, Li-Jun Peng |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
020502 materials Alloy Metals and Alloys 02 engineering and technology engineering.material Condensed Matter Physics Microstructure Grain size Continuous casting Solid solution strengthening Precipitation hardening 0205 materials engineering Materials Chemistry Hardening (metallurgy) engineering Extrusion Physical and Theoretical Chemistry Composite material |
| Zdroj: | Rare Metals. 40:2213-2220 |
| ISSN: | 1867-7185 1001-0521 |
| DOI: | 10.1007/s12598-019-01238-x |
| Popis: | Microstructure evolution and properties of a Cu–Cr–Ag alloy during the continuous manufacturing process were investigated in detail by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) in the study. The Cu–Cr–Ag alloy rod with uniform compositions is fabricated by upward continuous casting technology. Few of the Cr phases are observed in the as-cast alloy. During the continuous extrusion process, the severe shear deformation and the dynamic aging occur. The average grain size of as-extruded alloy is much smaller than that of as-cast alloy. Both fcc and bcc Cr precipitates appear in the matrix. The interaction mode between dislocations and precipitates can be identified as Orowan bypass mode according to the TEM observations. The overall difference in the yield strength between as-cast and as-extruded Cu–Cr–Ag alloy is attributed to solid solution strengthening, grain refinement strengthening, precipitation hardening and working hardening. |
| Databáze: | OpenAIRE |
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