Tensile deformation and fracture behavior of CuZn5 brass alloy at high temperature

Sharififar, Masoud; Mousavi, S.A.A. Akbari

doi:10.1016/j.msea.2013.11.051

Cited by 18 publications

(8 citation statements)

References 26 publications

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“…It is interesting to observe that in both air and solution, jagged stress–strain curves were recorded. This is a mechanical phenomenon known as dynamic strain aging or DSA [ 40 , 41 , 42 ]. In the case of α and α + β’ brasses it was attributed to the interaction of mobile dislocations with Zn solute atoms.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior and Susceptibility to Stress Corrosion Cracking of Leaded and Lead-Free Brasses in Simulated Drinking Water

et al. 2021

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Duplex α + β’ brasses are widely used in drinking water distribution systems for tube fittings, valves, and ancillaries because they are low cost, easy to fabricate, and exhibit high mechanical strength. However, depending on application conditions and alloy composition, they may undergo dealloying and stress corrosion cracking. In this research, three different brass types, two leaded (CW617N and CW602N) alloys and one lead-free brass (CW724R), were investigated to assess their corrosion behavior and susceptibility to stress corrosion cracking (SCC) in simulated drinking water (SDW) solutions containing different chloride concentrations, compatible with drinking water composition requirements according to Moroccan standard NM 03.7.001. The corrosion behavior was assessed by electrochemical tests such as polarization curve recording and electrochemical impedance spectroscopy (EIS) monitoring, coupled to SEM-EDS surface observations. The susceptibility to SCC was investigated by slow strain rate tests (SSRT). The tests showed that corrosion was mainly under diffusion control and chlorides slightly accelerated corrosion rates. All alloys, and particularly CW617N, were affected by SCC under the testing conditions adopted and in general the SCC susceptibility increased at increasing chloride concentration.

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Section: Resultsmentioning

confidence: 99%

Corrosion Behavior and Susceptibility to Stress Corrosion Cracking of Leaded and Lead-Free Brasses in Simulated Drinking Water

et al. 2021

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“…Calculation of k L C , k L b , k L a , and q The first step for calculating the flow behavior of a by the aforementioned approach is calculating the viscosity parameters of the constituents and the composite using the linear viscoplastic constitutive equation given in Eq. (1). For this purpose, k L C can be directly determined using the experimental results presented in Fig.…”

Section: B Self-consistent Modelmentioning

confidence: 99%

“…The hot deformation behavior of brasses with different microstructures of single-phase a or b and duplex a 1 b has been investigated and documented in the literature. [1][2][3][4][5][6] Despite our insight into the flow behaviors of individual a or b, our knowledge about their coexistence is still lacking. This is attributed to the different flow behaviors of a and b and their interactions during straining at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

Application of a self-consistent model to study the flow behavior of CuZn39Pb3 at elevated temperatures

Momeni

2015

J. Mater. Res.

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Hot compression tests were carried out on the duplex a 1 b leaded brass CuZn39Pb3 in temperature range of 600-800°C and at strain rates of 0.001-1 s À1 . 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 b and a 1 b composite to strain rate and the corresponding viscosity parameters were calculated at various deformation conditions. Using the viscosity parameters of b and a 1 b and the volume fractions of the constituents, the viscosity parameter of a was calculated. The values of the viscosity-like parameters and strain rate sensitivity for b and a 1 b composite were calculated using the nonlinear powerlaw viscoplastic equation. The results showed that the flow stress of a calculated using the self-consistent model was considerably higher than that of b. The difference could be attributed to the lower Zn content in a. The flow stress of a 1 b composite was calculated using the law of mixture rule. The law of mixture modeling of a 1 b 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 a and b.

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“…Brasses (Cu-Zn-X), which are produced by adding Pb to the basic elements (Cu and Zn), are probably the most popular Cu alloys. The overall Zn content influences not only the structure and present phases-brasses with very high and very low Zn content feature the beta or alpha phase, respectively [13], while brasses featuring Zn content between 40 and 60 wt.% are biphasic, i.e., they consist of combinations of both the alpha and beta phases [14]-but also the properties of the final brass, such as formability, mechanical properties, corrosion resistance, etc. Brass dezincification, influencing the corrosion resistance, is closely related to its structure, which is primarily determined by its chemical composition.…”

Section: Introductionmentioning

confidence: 99%

Structural Factors Inducing Cracking of Brass Fittings

et al. 2021

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Cu–Zn–Pb brasses are popular materials, from which numerous industrially and commercially used components are fabricated. These alloys are typically subjected to multiple-step processing—involving casting, extrusion, hot forming, and machining—which can introduce various defects to the final product. The present study focuses on the detailed characterization of the structure of a brass fitting—i.e., a pre-shaped medical gas valve, produced by hot die forging—and attempts to assess the factors beyond local cracking occurring during processing. The analyses involved characterization of plastic flow via optical microscopy, and investigations of the phenomena in the vicinity of the crack, for which we used scanning and transmission electron microscopy. Numerical simulation was implemented not only to characterize the plastic flow more in detail, but primarily to investigate the probability of the occurrence of cracking based on the presence of stress. Last, but not least, microhardness in specific locations of the fitting were examined. The results reveal that the cracking occurring in the location with the highest probability of the occurrence of defects was most likely induced by differences in the chemical composition; the location the crack in which developed exhibited local changes not only in chemical composition—which manifested as the presence of brittle precipitates—but also in beta phase depletion. Moreover, as a result of the presence of oxidic precipitates and the hard and brittle alpha phase, the vicinity of the crack exhibited an increase in microhardness, which contributed to local brittleness.

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Tensile deformation and fracture behavior of CuZn5 brass alloy at high temperature

Cited by 18 publications

References 26 publications

Corrosion Behavior and Susceptibility to Stress Corrosion Cracking of Leaded and Lead-Free Brasses in Simulated Drinking Water

Corrosion Behavior and Susceptibility to Stress Corrosion Cracking of Leaded and Lead-Free Brasses in Simulated Drinking Water

Application of a self-consistent model to study the flow behavior of CuZn39Pb3 at elevated temperatures

Structural Factors Inducing Cracking of Brass Fittings

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