Mechanical and Microstructural Evaluation of Plastically Deformed Brass

Bodude, M. A.; Momohjimoh, Ibrahim; Nnaji, Ruth Nkiruka

doi:10.4236/msa.2015.612112

Cited by 5 publications

(5 citation statements)

References 11 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The hardness values decreased in extrusion case as in samples 7 to10 due to the rise in temperature of billet castings during hot extrusion which leads to enlarge the sample structure. The hardness values are increased again during the cold drawing process due to the work hardening process and dislocation density increases which agree with the results of [15].…”

Section: A a Fadhil Et Alsupporting

confidence: 88%

“…Manufacturing experience with hot extrusion process shows that alpha and beta leaded brasses (CuZn40Pb2) are perfectly suitable for the extrusion process [8]. The material microstructure is highly affected by the production processes parameters and usually influences the properties of the material since any variation in microstructure can significantly change the strength, toughness, hardness, ductility and even thermal and electrical properties [9]. Therefore, the current investigation aims to study the effect of production parameters and the alloy constituents of raw materials on the mechanical properties of leaded brass (CuZn40Pb2) alloy which are used in gas valves production.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on the Effect of Production Parameters and Raw Materials Used on the Mechanical Properties of Leaded Brass (CuZn40Pb2) Alloy

Fadhil¹,

Enab²,

Samuel³

et al. 2017

WJET

View full text Add to dashboard Cite

Leaded brass alloys used progressively in many applications such as gas valves production owing to their excellent machinability, corrosion resistance and some other specifications. However, the production processes of these alloys involve some problems appearing in the last activities of production as a result of cumulative defects of previous production processes. Therefore, the current investigation studies the effect of process parameters during casting, hot extrusion and cold drawing production stages of CuZn40Pb2 leaded brass alloy on the mechanical properties. Starting with casting process, two types of charges were used. The first charge consists of 100% recycles while the second contains 30% of pure materials such as Cu, Zn and Pb in addition to the recycles. For each production stage, alloy hardness, micro-hardness, ultimate tensile strength and elongation were examined. The results illustrated that high hardness values are obtained during casting process due to some impurities such as iron and the effect of cooling rate through solidification. The hardness values decrease during extrusion process and then rise again by cold drawing for the charge of 30% pure materials. Micro-hardness values for the fractured tensile test samples appeared higher than others due to work hardening effect. The best mechanical properties as ultimate tensile strength of CuZn40Pb2 alloy products are appeared into cold forming samples with the 30% pure material added. Keywords

show abstract

Section: A a Fadhil Et Alsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Production Parameters and Raw Materials Used on the Mechanical Properties of Leaded Brass (CuZn40Pb2) Alloy

Fadhil¹,

Enab²,

Samuel³

et al. 2017

WJET

View full text Add to dashboard Cite

show abstract

“…That means the dislocation density increases with the rolling level, so the hardness as usual increases. Higher hardness values are gained for the Cu based alloys than that of commercially pure copper because the solid solution strengthening takes place through the dissolved Al and Zn atoms into the alloys [15,16]. These solute atoms hamper the dislocation movement by pinning the grain boundary and therefore the cold rolled alloy keep a stable supersaturating density of dislocations, as a result, high work hardening rate [11].…”

Section: Resultsmentioning

confidence: 99%

IMPACT OF COLD PLASTIC DEFORMATION AND THERMAL POST-TREATMENT ON THE PHYSICAL PROPERTIES OF COPPER BASED ALLOYS Al-BRONZE AND α-BRASS

Kaiser

Kaiser²

2021

Acta Metall Slovaca

View full text Add to dashboard Cite

The copper based alloys Al-bronze and α-brass containing each of 10wt% aluminum and zinc were prepared by casting. Afterwards, the specimens were cold-rolled with various percentages of deformation and the cold-rolled samples were aged subsequently at the varied time for four hours and temperatures ranging up to 500°C. Samples underwent characterizations by microhardness testing, electrical resistivity, optical properties, differential scanning calorimetry as well as microstructure analysis using an optical microscope. The results showed that the hardening of Cu-based alloys was taken place due to solid-solution hardening. Al addition accelerated the hardness through ageing due to the formation of various intermetallic copper aluminites into the aged alloy which was hard and brittle in nature. The resistivity decreased marginally through heat treatment due to the stage of stress relieving, recovery, precipitation coarsening as well as recrystallization and increased for arranging different intermetallics into the alloys. The microstructural study revealed that the cold rolled alloys content the different phases of elongated grain at the rolling direction. Meanwhile higher ageing temperatures at 500°C for one hour led to recrystallization and grain growth especially in pure copper and Cu-10Zn alloys.

show abstract

“…As solution strengthening occurs through the dissolved Zn and Al atoms in the alloys. As a result, α-brass and Al-bronze have higher hardness compared to Cu [15,16]. Again, Al-bronze has superior hardness to Zn-bearing α-brass.…”

Section: Physical Propertiesmentioning

confidence: 99%

Electrochemical corrosion performance of copper and uniformly alloyed bronze and brass in 0.1 M NaCl solution

Abdullah Khan,

Kaiser,

Kaiser

2023

Rev. Mex. Fís.

View full text Add to dashboard Cite

The influence of Al and Zn by 10 wt.% as alloying elements on the electrochemical corrosion behaviour of Cu-based alloy in 0.1 M NaCl solution is examined. Results from both electrochemical impedance spectroscopy method and potentiodynamic techniques indicate that the corrosion occurred at a higher rate for Zn and Al added alloys than pure Cu, where Zn added alloy shows the worst corrosion performance. Copper forms stable a protective layer of Cu2O, and CuO, as a result, has a lower corrosion rate. In case of Al and Zn added alloys, dealloying, as well as dissolution of additional Al2O3 and ZnO are responsible for higher corrosion rates, respectively. The surfaces are investigated by optical and scanning electron microscopy. Phases of different intermetallics within the Cu matrix are identified in the etched optical micrographs of the experimental alloys. The optical images after corrosion depict layers of oxides on the surfaces where the Zn-added alloys are highly affected, followed by Al-added alloys and pure Cu. Increased amounts of internal damage to the surface of the Zn-added alloy are visible in the SEM images. The EDX spectrum not only supports the presence of oxide layers but also claims that Zn-containing particles are dissolved at a greater rate than Al.

show abstract

Mechanical and Microstructural Evaluation of Plastically Deformed Brass

Cited by 5 publications

References 11 publications

Study on the Effect of Production Parameters and Raw Materials Used on the Mechanical Properties of Leaded Brass (CuZn40Pb2) Alloy

Study on the Effect of Production Parameters and Raw Materials Used on the Mechanical Properties of Leaded Brass (CuZn40Pb2) Alloy

IMPACT OF COLD PLASTIC DEFORMATION AND THERMAL POST-TREATMENT ON THE PHYSICAL PROPERTIES OF COPPER BASED ALLOYS Al-BRONZE AND α-BRASS

Electrochemical corrosion performance of copper and uniformly alloyed bronze and brass in 0.1 M NaCl solution

Contact Info

Product

Resources

About