Texture analysis of Napoleonic War Era copper bolts

Malamud, Florencia; Northover, Shirley; James, J. A.; Northover, Peter; Kelleher, Joe

doi:10.1007/s00339-016-9835-y

Cited by 3 publications

(8 citation statements)

References 14 publications

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“…This gives rise to a wide range of possible textures that might be identified, and the potential for texture analysis to differentiate between the different manufacturing systems. The possible variety of textures correlates with the three different textures found in the three bolt sections studied earlier (Malamud et al, 2016). However, two particular questions still unresolved were the extent of the variation in the texture over a cross section and, more broadly, the full range of textures that might be expected.…”

Section: History Of the Navy's Use Of Copper Bolts 1760-1830mentioning

confidence: 86%

“…Bolt segment sample. The crystallographic texture at the centre of the copper bolt segment sample was determined using neutron diffraction and NyRTex data analysis, and the results were validated by complementary experiments using electron backscatter diffraction (EBSD) measurements and laboratory X-ray diffraction (Malamud et al, 2016). In all cases, the recalculated pole figures for the segment showed a marked double-fibre texture: a strong -fibre with {111} planes parallel to the bolt axis and a minor h100i fibre component.…”

Section: Hms Pomonementioning

confidence: 96%

“…The complete bolt central point texture was studied using ENGIN-X and the full ODF reconstructed from the experimental data using NyRTex (Malamud et al, 2016). The data were analysed in a 2 Â 5 (horizontal Â vertical) gridding scheme, which gives each virtual detector a coverage of $8 Â 8 in angular space.…”

Section: Hms Impregnablementioning

confidence: 99%

“…AB1-02-01 sample. The central point texture of the AB1-02-01 sample was measured using an instrument configuration and data analysis strategy identical to that for the segment sample (Malamud et al, 2016). The ODF of the material was calculated using NyRTex and MTEX from the {111}, {200}, {220} and {311} experimental pole figures assuming triclinic sample symmetry.…”

Section: Hms Pomonementioning

confidence: 99%

“…This idea was recently implemented in the data analysis method NyRTex and used to study the crystallographic texture at the centre of three copper bolts from two identified ship wrecks, HMS Pomone and HMS Impregnable (Malamud et al, 2016). The results demonstrated the value of this technique in distinguishing between the different production processes of the different sizes of bolts without the need for unacceptably intrusive sampling.…”

Section: Introductionmentioning

confidence: 99%

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Spatially resolved texture analysis of Napoleonic War era copper bolts

et al. 2017

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Abstract:The spatial resolution achievable by a time-of-flight neutron strain scanner has been harnessed using a new data analysis methodology (NyRTex) to determine, non-destructively, the spatial variation of crystallographic texture in objects of the cultural heritage. Previous studies on the crystallographic texture at the centre of three Napoleonic war era copper bolts, which demonstrated the value of this technique in differentiating between the different production processes of the different types of bolts, was extended to four copper bolts from the wrecks of HMS Impregnable (completed 1786), HMS Amethyst (1799), HMS Pomone (1805), and HMS Maeander (1840) along with a cylindrical 'segment' of a further incomplete bolt from HMS Pomone. These included bolts with works stamps, allowing comparison with documentary accounts of the manufacturing processes used, and the results demonstrated unequivocally that bolts with a 'Westwood and Collins' patent stamp were made using the Collins rather than the Westwood process. In some bolts there was a pronounced variation in texture across the cross-section. In some cases this is consistent with what is known of the types of hot and cold working used but the results from the latest might also suggest that even in the mature phase of this technology, some hand finishing was sometimes necessary. This examination of bolts from a wider range of dates is an important step in increasing our understanding of the introduction and evolution of copper fastenings in Royal Navy warships.

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Section: History Of the Navy's Use Of Copper Bolts 1760-1830mentioning

confidence: 86%

Section: Hms Pomonementioning

confidence: 96%

Section: Hms Impregnablementioning

confidence: 99%

Section: Hms Pomonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations