Metallographic and Finite Element Evaluation of Plastic Deformation During the Forming Process of Cartridge Brass Casings

Bezecný, Ján; Dubec, Andrej

doi:10.1016/j.proeng.2016.01.187

Cited by 5 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are plenty of different microstructural sites in steels such as grain boundaries, free dislocations, precipitates and inclusions which may interact with absorbed hydrogen and thus make effects on the resulting tensile properties and fracture behaviour. Figure 6b indicates that the effect of additional carbide precipitation and/or coarsening during long-term thermal exposition may even have a slight positive effect on the resulting plastic properties through a certain suppression of hydrogen embrittlement by the mechanism of hydrogen trapping at the carbide/matrix interfaces, described also in many other studies [47][48][49][50]. These irreversible hydrogen traps can bind up free atomic hydrogen within the crystal lattice.…”

Section: Mechanical Properties and Microstructure Evolutionmentioning

confidence: 60%

“…According to specific morphological terminology for hydrogen embrittlement fracture features, described e.g. in [52][53][54], the typical "fish-eyes" and "crows-feet" marks are clearly distinguishable on fracture surfaces of T24 HAZ and T92 HAZ, respectively. It can reasonably be assumed that the aged HAZ regions contain a higher concentration of hydrogen than base mate- rials under the same cathodic charging conditions.…”

Section: Fracture Behaviourmentioning

confidence: 99%

“…It can reasonably be assumed that the aged HAZ regions contain a higher concentration of hydrogen than base mate- rials under the same cathodic charging conditions. The higher solubility of hydrogen in the aged HAZ regions of steels may be interpreted in terms of an increased capacity of hydrogen trapping sites, namely the carbide/matrix interfaces [47][48][49][50], caused by the higher volume fraction of carbides formed in microstructures with the higher initial level of transformation hardening after the welding process. However, the hydrogen is well-known to be distributed in steels heterogeneously.…”

Section: Fracture Behaviourmentioning

confidence: 99%

See 2 more Smart Citations

Hydrogen pre-charging effects on the notch tensile properties and fracture behaviour of heat-affected zones of thermally aged welds between T24 and T92 creep-resistant steels

Falat¹,

Čiripová²,

Homolová³

et al. 2016

View full text Add to dashboard Cite

The effects of thermal exposure at 600• C and subsequent electrolytic hydrogen charging at ambient temperature were studied in terms of their influence on notch-tensile properties and fracture behaviour of individual heat-affected zones (HAZ) of Ni-based transition weldments between T24 and T92 creep-resistant steels. The experimental welded joints were prepared by gas tungsten arc welding using "Inconel-type" filler metal Nirod 600. Post-weld heat treatment (PWHT) was carried out at 720• C for 2 h, followed by passive cooling within tempering furnace. Subsequent long-term ageing of two series of prepared T24/T92 dissimilar welds at 600• C for 1000 and 5000 h, respectively, led to gradual changes in both T24 and T92 HAZ microstructures, which were mainly related to their additional tempering accompanied by the coarsening of original precipitates as well as newly-formed secondary phases. The observed thermally-induced microstructural changes together with subsequently applied hydrogen charging effects resulted in complex variations in tensile properties and fracture behaviour of individual HAZ regions related to the pre-existing differences in their initial tempering grade due to the used PWHT procedure. K e y w o r d s : creep-resistant steels, dissimilar welding, isothermal ageing, hydrogen embrittlement, mechanical properties, fracture mechanisms

show abstract

Section: Mechanical Properties and Microstructure Evolutionmentioning

confidence: 60%

Section: Fracture Behaviourmentioning

confidence: 99%

Section: Fracture Behaviourmentioning

confidence: 99%

See 1 more Smart Citation

Hydrogen pre-charging effects on the notch tensile properties and fracture behaviour of heat-affected zones of thermally aged welds between T24 and T92 creep-resistant steels

Falat¹,

Čiripová²,

Homolová³

et al. 2016

View full text Add to dashboard Cite

show abstract

“…For example, examination of the brass cases from the Akko 1 shipwreck revealed presence of -brass grains with annealing twins [16,27]. Such microstructure is typical of brass plate manufactured by rolling and annealing cycles [28,29].…”

Section: Metallographic Inspection Of Ancient Metal Artefacts Retrievmentioning

confidence: 99%

“…The brass cases of Akko 1 had a uniform thickness of 0.5-0.55 mm. Based on their microstructure, including the presence of preferred oriented imperfections, these cases were produced of -brass rolled sheets [14,16,28,29]. In another example from the nineteenth century Puerto Pirámides 1 shipwreck (Argentina), the rolled brass sheathing was 0.41±0.07 mm thick.…”

Section: -mentioning

confidence: 99%

Analysis of naturally etched surface of brass sheathing from a nineteenth-century shipwreck

Ashkenazi

Inberg

Cvikel

2018

J min metall B Metall

View full text Add to dashboard Cite

The Akko Tower Wreck is ently the remains of a 25-m-long merchant brig, dated to the first half of the nineteenth century. During the 2015 underwater excavation, a piece of brass sheet was retrieved from the shipwreck and its surface and bulk were examined by metallurgical analyses. The examinations revealed a unique example of almost two hundred years' natural etching, which took place in the sea underwater environment. The surface of the sheet was covered with different copper and zinc oxides, which were identified by XRD analysis. Observation of the naturally etched surface with multi-focal light microscopy and SEM-EDS analysis indicated a microstructure of annealed brass, similar to that of its bulk. S-OES chemical analysis of the bulk revealed a composition of 65.0 wt% Cu, 34.4 wt% Zn and 0.6 wt% Pb. Based on the thickness of the sheet and its good state of preservation, it is suggested that it was used as sheathing to protect the hull against marine organisms, and to improve the sailing qualities of the ship. The results provide further information about the Akko Tower shipwreck; and expand our knowledge regarding the corrosion processes and preservation of brass during a long burial period in marine environments.

show abstract

Cold deformation of dezincification resistant yellow brass for plumbing applications

Sivasankaran

Alaboodi

Al-Mufadi

2018

Materials and Manufacturing Processes

View full text Add to dashboard Cite

Metallographic and Finite Element Evaluation of Plastic Deformation During the Forming Process of Cartridge Brass Casings

Cited by 5 publications

References 0 publications

Hydrogen pre-charging effects on the notch tensile properties and fracture behaviour of heat-affected zones of thermally aged welds between T24 and T92 creep-resistant steels

Hydrogen pre-charging effects on the notch tensile properties and fracture behaviour of heat-affected zones of thermally aged welds between T24 and T92 creep-resistant steels

Analysis of naturally etched surface of brass sheathing from a nineteenth-century shipwreck

Cold deformation of dezincification resistant yellow brass for plumbing applications

Contact Info

Product

Resources

About