Investigation of the Distribution of Lead in Three Different Combinations of Brass Feedstock

Bagherian, Ehsaan-Reza; Fan, Yongchang; Cooper, Mervyn; Frame, Brian; Abdolvand, Amin

doi:10.1007/s40962-016-0055-1

Cited by 8 publications

(8 citation statements)

References 8 publications

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“…less than one-fifth of the beam footprint). If the lead had been added deliberately to the brass to improve its ductility we would expect it to be more evenly distributed at the grain boundaries (Bagherian et al, 2016) and just detectable with SEM-EDS. Moreover, the factor of ten drop in lead content for MR81A1436 with its abrasively cleaned surface compared with MR81A2249, observed using XRF (Fig.…”

Section: Mr81a2249mentioning

confidence: 99%

Synchrotron X-ray diffraction investigation of the surface condition of artefacts from King Henry VIII's warship the Mary Rose

Dowsett¹,

Sabbe²,

Anjos³

et al. 2020

J Synchrotron Radiat

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Synchrotron X-ray diffraction (XRD) measured on the XMaS beamline at the ESRF was used to characterize the alloy composition and crystalline surface corrosion of three copper alloy Tudor artefacts recovered from the undersea wreck of King Henry VIII's warship the Mary Rose. The XRD method adopted has a dynamic range $1:10 5 and allows reflections <0.002% of the height of major reflections in the pattern to be discerned above the background without smoothing. Laboratory XRD, scanning electron microscopy-energy dispersive spectroscopy, synchrotron X-ray fluorescence and X-ray excited optical luminescence-X-ray near-edge absorption structure were used as supporting techniques, and the combination revealed structural and compositional features of importance to both archaeology and conservation. The artefacts were brass links believed to be fragments of chainmail and were excavated from the seabed during 1981 and 1982. Their condition reflects very different treatment just after recovery, viz. complete cleaning and conservation, chemical corrosion inhibition and chloride removal only, and distilled water soaking only (to remove the chlorides). The brass composition has been determined for all three at least in the top 7 mm or so as Cu(73%)Zn(27%) from the lattice constant. Measurement of the peak widths showed significant differences in the crystallite size and microstrain between the three samples. All of the links are found to be almost chloride-free with the main corrosion products being spertiniite, sphalerite, zincite, covellite and chalcocite. The balance of corrosion products between the links reflects the conservation treatment applied to one and points to different corrosion environments for the other two. research papers 654 Dowsett et al. Surface condition of artefacts from the Mary Rose

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Section: Mr81a2249mentioning

confidence: 99%

Synchrotron X-ray diffraction investigation of the surface condition of artefacts from King Henry VIII's warship the Mary Rose

Dowsett¹,

Sabbe²,

Anjos³

et al. 2020

J Synchrotron Radiat

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“…Brass alloys are extensively used in many industrial products, such as bushes, bearings, valves connectors, pipes, heat exchangers, etc, due to their high corrosion resistance, high formability, and acceptable strength. [1][2][3] Brass alloys can be classified according to their structure as: a, a ? b and b-brasses.…”

Section: Introductionmentioning

confidence: 99%

“…b and b-brasses. 3 For the cast brass, the microstructure contains denderitic structure of a solid solution, Widmansta ¨tten structure of a ? b and the hexagonal structure of b.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasonic Vibration Treatment on Microstructure, Tensile Properties, Hardness and Wear Behaviour of Brass Alloy

2022

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Effect of ultrasonic vibration (USV) treatment on microstructure and mechanical properties of brass alloy has been investigated. Microstructure of the investigated brass alloy without USV treatment exhibited stretched and dendritic α-phase within an average length of 165 µm and also interdendritic coarse β-phase. By applying USV treatment, the α-phase is significantly refined that obtained an average length of 21 µm. In addition, USV treatment achieved more homogenized structure of α and β-phases. The refinement of microstructure enhanced of course the mechanical properties of the brass alloy including yield strength, ultimate tensile strength, elongation, hardness and wear resistance. Furthermore, fracture surfaces and worn surfaces mechanisms were also discussed.

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“…The high relative strength and good corrosion resistance in addition to its high electrical and thermal conductivities, and economically costs made brass as one of the most important alloys required in industry [1][2][3]. Most of the industrial applications related to metal forming prefer alloys that are characterized by the plastic formability, and this is an additional feature that contributed to the spread of brass alloys in most industrial products [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Influence of HIP sintering technique on the reliability of the mechanical properties of brass-an experimental study.

Alnomani¹

2022

Diagnostyka

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The reliability of the mechanical properties of any product plays an important role in the longevity of the product to work properly under various working conditions. In the present study, the effect of preparing brass alloy on its mechanical properties was experimentally studied. Samples of brass (60% Cu-40% Zn) were prepared by hot iso-stating pressing (HIP) sintering method and some main mechanical tests were performed on them included porosity, density, hardness and compression tests. Results of these tests were compared with corresponding tests on commercial brass alloys produced by casting in order to show the effect of the method of preparing on their mechanical properties. There was a significant improvement in the hardness and strength of the sintered alloy due to the increasing in density and decreasing in porosity comparing with the corresponding other casting's alloys. Results showed an improvement in the density values by 8.4% as a result of the significant reduction in the porosity values from 8.65% to about 0.43%. As a result, the strength of the alloys prepared by the heat pressing method has jumped to a value of 600MPa compared to the traditional castings that have a strength of 343MPa.

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Investigation of the Distribution of Lead in Three Different Combinations of Brass Feedstock

Cited by 8 publications

References 8 publications

Synchrotron X-ray diffraction investigation of the surface condition of artefacts from King Henry VIII's warship the Mary Rose

Synchrotron X-ray diffraction investigation of the surface condition of artefacts from King Henry VIII's warship the Mary Rose

Effect of Ultrasonic Vibration Treatment on Microstructure, Tensile Properties, Hardness and Wear Behaviour of Brass Alloy

Influence of HIP sintering technique on the reliability of the mechanical properties of brass-an experimental study.

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