Application of a self-consistent model to study the flow behavior of CuZn39Pb3 at elevated temperatures. Issue 22 (13th November 2015)

• Record Type: Journal Article
• Authors: Momeni, A.
• Is Part Of: Journal of materials research. Volume 30:Issue 22(2015)
• Page Start: 3453
• Page End: 3460
• Publication Date: 2015-11-13
• Subjects: hot pressing, -- Cu, -- stress/strain relationship, -- brass, -- modeling; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1557/jmr.2015.337
• Languages: English
• ISSNs: 0884-2914

Abstract

Abstract: Abstract : Hot compression tests were carried out on the duplex α + β leaded brass CuZn39Pb3 in temperature range of 600–800 °C and at strain rates of 0.001–1 s −1 . A self-consistent model was used to analyze the flow behavior of the constituents and the material. A linear viscoplastic model was used to relate the flow stress of β and α + β composite to strain rate and the corresponding viscosity parameters were calculated at various deformation conditions. Using the viscosity parameters of β and α + β and the volume fractions of the constituents, the viscosity parameter of α was calculated. The values of the viscosity-like parameters and strain rate sensitivity for β and α + β composite were calculated using the nonlinear powerlaw viscoplastic equation. The results showed that the flow stress of α calculated using the self-consistent model was considerably higher than that of β. The difference could be attributed to the lower Zn content in α. The flow stress of α + β composite was calculated using the law of mixture rule. The law of mixture modeling of α + β composite for the iso-strain condition resulted to the overestimation of flow stress. The difference between the experimental and predicted results was attribute to the strain partitioning between α and β.