ArticleMaterials (Basel, Switzerland)2026
Optimization of Mechanical Characteristics of Cu-35.8%Zn Brass by Rotary Swaging and Subsequent Annealing.
Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The effect of rotary swaging (RS) at room temperature and subsequent annealing at 350 °C on the microstructure, mechanical properties, and fatigue strength of Cu-35.8%Zn two-phase brass was studied. A structure with grains of α and β' phases elongated along the deformation direction was formed after RS. It was also shown that subgrains of 200-300 nm in size, shear bands 100-200 nm wide, and deformation twins 10-30 nm wide were formed inside the α-phase grains. RS caused the increase in the yield stress (YS) from 93 ± 4 to 717 ± 6 MPa and the ultimate tensile strength (UTS) from 332 ± 2 to 744 ± 19 MPa with a decrease in ductility (El) from 71.0 ± 2.0 to 10.3 ± 1.7%. The fatigue limit also increased from 240 to 415 MPa after RS. Subsequent annealing at 350 °C induced recrystallization of the α-phase with the formation of equiaxed grains 2.2-3.6 µm in size, which resulted in a decrease in UTS to 462-466 MPa and an increase in ductility to 44-45%. Extending the annealing time to 4 h did not affect the strength and ductility values of the alloy.
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