Experimental Studies on Melt Erosion at Rail-Armature Contact of Rail Launcher in Current Range of 10–20 kA/mm

Xia, Shengguo; Hu, Yuyang; Chen, Lixue; He, Junjia; Yuan, Zhao; He, Hengxin; Yan, Ping; Li, Jun

doi:10.1109/tps.2017.2711623

Cited by 15 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For armature melting (as shown in Figure 6), Xia et al [38] used a payload-separation method to keep the recovered armatures intact. The experimental conditions included an armature and payload mass of 395.05 g, with a peak current ranging from 249.40 to 403.40 kA.…”

Section: Coupling Damagementioning

confidence: 99%

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

Wang,

Yao,

Zhou

et al. 2024

Materials

View full text Add to dashboard Cite

Electromagnetic rail launch technology has attracted increasing attention owing to its advantages in terms of range, firepower, and speed. However, due to electricity-magnetism-heat-force coupling, the surface of the armature–rail friction pair becomes severely damaged, which restricts the development of this technology. A series of studies have been conducted to reduce the damage of the armature–rail friction pair, including an analysis of the damage mechanism and protection strategies. In this study, various types of surface damage were classified into mechanical, electrical, and coupling damages according to their causes. This damage is caused by factors such as mechanical friction, mechanical impact, and electric erosion, either individually or in combination. Then, a detailed investigation of protection strategies for reducing damage is introduced, including material improvement through the use of novel combined deformation and heat treatment processes to achieve high strength and high conductivity, as well as surface treatment technologies such as structural coatings for wear resistance and functional coatings for ablation and melting resistance. Finally, future development prospects of armature–rail friction pair materials are discussed. This study provides a theoretical basis and directions for the development of high-performance materials for the armature–rail friction pair.

show abstract

Section: Coupling Damagementioning

confidence: 99%

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

Wang,

Yao,

Zhou

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…The actual situation of current melting wave erosion in the armature is demonstrated by experimentally recovered armatures, where the actual process is more complex than predicted by the melting wave model [9][10][11][12]. Melting wave propagation is related to both the flow of the aluminum fluid and current distribution and is more obvious in stationary and low velocities situations.…”

Section: Armature Current Melting Wave Modelmentioning

confidence: 99%

A review of static/quasi-static calculations of Electromagnetic-thermal coupling sliding electrical contact characteristics of armature and rails

2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The analysis of the sliding electrical contact characteristics between the armature and rails is an important research area for electromagnetic railguns. In this paper, a sliding electrical contact model considering non-ideal factors is introduced, the magneto-thermal coupling characteristics of the contact interface are summarized, and the current and temperature distribution characteristics are outlined. In the end, measures that can be taken to improve the contact performance are presented in terms of armature rail material selection and structural optimization.

show abstract

“…[9]- [12]. As the deficit at L pr is associated with maximum rail current density [13], the transition is the main candidate for such a loss mechanism. The deficit at the acceleration has occurred at the late stage of the launch, which is a shred of strong evidence for transition.…”

Section: Introductionmentioning

confidence: 99%

Inductance Gradient Calculations of EMFY-3 Electromagnetic Launcher

Tosun¹,

Keysan²

2021

Preprint

View full text Add to dashboard Cite

<div>ASELSAN Inc. has been working on electromagnetic launch technologies since 2014. The first prototype, EMFY-1, has a 25 mm × 25 mm square bore and 3-m-length rails. The second prototype, EMFY-2, has a 50 × 50 mm square bore and 3-m-length. In this paper, a recently developed prototype, EMFY-3, is presented, which has a 50 × 75 mm rectangular bore and 6-m-length. The input energy of the PPS is doubled to 8 MJ, and the 2.91 MJ muzzle energy is obtained up to now. Rail currents, breech, and muzzle voltages are measured to investigate electromagnetic calculations. Velocity curves are captured with Doppler radar, which enables us to establish propulsive inductance gradient L0pr transients empirically. The results confirm that L0 pr is constant throughout the launch, as no significant breaking mechanism occurs with the non-magnetic containment. However, a slight variation (%2 at maximum) happens from one launch to another with different rails’ current magnitudes. The transition phenomenon is a candidate for the drop in the L0 pr, as it occurs more likely at launches with higher linear current densities.</div>

show abstract

Experimental Studies on Melt Erosion at Rail-Armature Contact of Rail Launcher in Current Range of 10–20 kA/mm

Cited by 15 publications

References 12 publications

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

A review of static/quasi-static calculations of Electromagnetic-thermal coupling sliding electrical contact characteristics of armature and rails

Inductance Gradient Calculations of EMFY-3 Electromagnetic Launcher

Contact Info

Product

Resources

About