The response of different copper alloys as rail contacts at the breech of an electromagnetic launcher

Gee, R.M.; Persad, C.

doi:10.1109/20.911834

Cited by 29 publications

(10 citation statements)

References 23 publications

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“…The findings confirm and extend previous observations [5,[7][8][9] and point to fundamental materials aspects of sliding friction and wear involving solid-state and melt-phase mechanical or liquid-phase mixing and associated vortex phenomena contributing to dynamic recrystallization and amorphization. Fig.…”

Section: Introductionsupporting

confidence: 89%

“…Similar kinds of damage have also been characterized in high-energy switch electrode and insulator materials comprising high-energy sparkgap switch systems and related pulsed-power applications [6]. Rail damage in railgun systems employing a variety of conductive alloys has been studied by Gee and Persad [7] while Tzeng [8] and Meger [9] have recently summarized railgun material and mechanics research. Related effects such as gauging of rails, armature wear, and liquid metal effects have also been examined [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Materials characterization of railgun erosion phenomena

Machado

Murr

Martínez

et al. 2011

Materials Science and Engineering: A

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Section: Introductionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Materials characterization of railgun erosion phenomena

Machado

Murr

Martínez

et al. 2011

Materials Science and Engineering: A

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“…Grooving on copper alloys was reported for the first time byGeeet al [1]in multipleelectromagnetic launching. Groovesinitiated approximately 35mm from the starting position, and were sharp groove shape and 62.8μm deep.…”

Section: The Surface Transient Damage Of Copper Alloys During Electromentioning

confidence: 99%

Development of Transient Damage Behaviors of Copper Alloys under High Velocity Sliding Electrical Contact

Zhang¹,

Guo²,

Huang³

et al. 2016

Proceedings of the 4th 2016 International Conference on Material Science and Engineering (ICMSE 2016)

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The transient damage problems of copper alloys are the central topic for improving the accuracy and lifetime of electromagnetic launcher. The research works on transient damage behaviors of copper alloys under high-speed sliding electrical contact during the past two decades were summarized in this paper and some suggestions for future research were presented. Firstly the three damage forms of copper alloys under high-velocity sliding electrical contact were introduced, respectively. Then the main technical methods that can solve the damage problems of copper alloys were presented. Finally some proposals for further study on transient damage behavior of copper alloys under sliding electrical contact were put forward.

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“…At that time, R. M. Gee attributed the grooving phenomenon to plastic deformation of the material, but no other work was done [4].…”

Section: Grooving Phenomenon Of Rail Materialsmentioning

confidence: 99%

“…In 1998, R. M. Gee first discovered grooving phenomenon on the medium calibre launcher of the institute of high technology(IHT) [4], when the track is Be-Cu, 10 test, track channel erosion damage obviously, contour detection of Be-Cu damage of the cross-sectional area, found a groove into the lip on the two side edge of the track; for W-Cu, Cr-Cu and Ds-Cu have no grooving phenomenon. At that time, R. M. Gee attributed the grooving phenomenon to plastic deformation of the material, but no other work was done [4].…”

Section: Grooving Phenomenon Of Rail Materialsmentioning

confidence: 99%

Grooving Phenomenon Analysis of Series-Connected Augmented Sextupole Rails Material

Xue¹,

Shu²,

Liu³

et al. 2018

Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)

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Abstract-Because the electromagnetic railgun's main current can reach several MA and the muzzle velocity is more than 2 km/s, launching in this harsh environment in barrel will cause grooving to the rail. Using existing experimental data of references, this paper analyses the position and depth analysis of the grooving phenomenon. So this paper design series connected augmented sextupole rails electromagnetic launcher to obtain high inductance gradient. High inductance gradient plays an important role in a novel electromagnetic launcher. Since inductance gradient is the decisive factor to super high speed and reduce high current, this study focuses on the design of launch model and inductance gradient distribution in moving area of double projectile. In this study we will simulate three typical series augmented sextupole rails connection mode, with finite element method and compare them. The theoretical analysis and numerical simulations indicate that the inductance gradient performance of the A configuration is better than other configurations. Therefore, this configuration could reduce the grooving phenomenon of sextupole rails.

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The response of different copper alloys as rail contacts at the breech of an electromagnetic launcher

Cited by 29 publications

References 23 publications

Materials characterization of railgun erosion phenomena

Materials characterization of railgun erosion phenomena

Development of Transient Damage Behaviors of Copper Alloys under High Velocity Sliding Electrical Contact

Grooving Phenomenon Analysis of Series-Connected Augmented Sextupole Rails Material

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