Degradation failure features of chromium-plated gun barrels with a laser-discrete-quenched substrate

Li, Huaixue; Chen, Guangnan; Zhang, Kun; Luo, Guan‐Zheng; Ye, Zhijun

doi:10.1016/j.surfcoat.2007.04.034

Cited by 24 publications

(9 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The outer-side coating modulus was obtained by substituting the tested substrate modulus, vertical displacement, and geometrical dimensions of the SiC/graphite composite split ring piece into Eqs. (26)- (28). And the inner-side coating modulus was calculated by Eqs.…”

Section: Validity Of the Relative Methodsmentioning

confidence: 99%

“…In addition, the coated tubular components are often used at HT and the coatings are required to be on the inside or outside surface of the tubes. For instance, the thermal sprayed coatings are on the out wall of boiler tubes [24,25], and some HT coatings are on the inner surface of the nozzle wall, gun barrel, and engine cylinder liners [26][27][28][29][30]. Also the enamel coatings are applied on both inside and outside surfaces of the combustor liners [31].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluating high temperature elastic modulus of ceramic coatings by relative method

et al. 2017

View full text Add to dashboard Cite

Abstract:The accurate evaluation of the elastic modulus of ceramic coatings at high temperature (HT) is of high significance for industrial application, yet it is not easy to get the practical modulus at HT due to the difficulty of the deformation measurement and coating separation from the composite samples. This work presented a simple approach in which relative method was used twice to solve this problem indirectly. Given a single-face or double-face coated beam sample, the relative method was firstly used to determine the real mid-span deflection of the three-point bending piece at HT, and secondly to derive the analytical relation among the HT moduli of the coating, the coated and uncoated samples. Thus the HT modulus of the coatings on beam samples is determined uniquely via the measured HT moduli of the samples with and without coatings. For a ring sample (from tube with outer-side, inner-side, and double-side coating), the relative method was used firstly to determine the real compression deformation of a split ring sample at HT, secondly to derive the relationship among the slope of load-deformation curve of the coated ring, the HT modulus of the coating and substrate. Thus, the HT modulus of ceramic coatings can be evaluated by the substrate modulus and the load-deformation data of coated rings. Mathematic expressions of those calculations were derived for the beam and ring samples. CVD-SiC coatings on graphite substrate were selected as the testing samples, of which the measured modulus ranging from room temperature to 2100 ℃ demonstrated the validity and convenience of the relative method.

show abstract

Section: Validity Of the Relative Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluating high temperature elastic modulus of ceramic coatings by relative method

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The cannon barrel is the most important part of the artillery system, its comprehensive mechanical properties have a key in uence on the range, hit accuracy, ring speed, and service life of artillery systems [2] . Because of the high-load working environment, it is necessary to improve the hardness and wear resistance of the 32CrNi3MoVE steel to ensure the stability of the artillery system during the entire service period [3] . Surface strengthening technology can improve the surface material properties while retaining the good toughness and ductility of the internal material [4,5] .…”

Section: Introductionmentioning

confidence: 99%

Effects of Laser Shock Peening on Microstructure and Properties in 32CrNi3MoVE Steel

Sun

Zhao

Qiao

et al. 2021

Preprint

View full text Add to dashboard Cite

The effects of laser shock peening (LSP) on microstructure and properties of 32CrNi3MoVE steel are investigated. Laser shock peening experiment was undertaken using a laser system with the pulse-width of 15ns, 50% overlap rate, and pulse-energy of 7J. The microhardness, residual stress, microstructure, and wear resistance of the laser shock peening 32CrNi3MoVE steel samples were measured. The results show that the microhardness and residual compressive stress distribution is remarkably improved by LSP. High-density dislocations are generated and the width of the martensite grains is reduced to a certain extent, indicating the phenomenon of grain compression. The friction coefficient and wear rate of the material reduces so that the wear resistance is correspondingly improved. The wear mechanism of the untreated sample is abrasive wear and adhesive wear, the wear mechanism of the treated samples is abrasive wear.

show abstract

“…It is caused by the passage of some gunpowder gases before the bullet due to the increased diameter of the barrel, resulting from degradation of the barrel duct due to the effects of hot powder gases [1][2][3]. The traditional and most commonly used method of protecting the barrel against wear is to apply a galvanic chromium layer in the cable to ensure high hardness, abrasion, and corrosion resistance [4][5][6][7][8][9][10]. For technological reasons, the thickness of this layer does not exceed 0.1 mm.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Thermophysical Properties of Three Barrel Steels

Koniorczyk

Zmywaczyk

Dębski

et al. 2020

Metals

View full text Add to dashboard Cite

In this paper, thermal diffusivity and heat capacity measurements were performed for three types of barrel steel, 38HMJ (1.8509), 30HN2MFA, and duplex (1.4462). Thermal diffusivity tests as a function of temperature were performed in the range of room temperature (RT) to 500 °C, and specific heat in the range of RT to 1000 °C. All tests were carried out using NETZSCH specialized measuring stands: LFA 467 light flash apparatus and DSC 404 F1 Pegasus differential scanning calorimeter. In the measurements of thermal diffusivity, the reference material Inconel 600 was used. This made it possible to determine thermal conductivity and specific heat as a function of the temperature of barrel steel. The results of specific heat tests of the 38HMJ and the 30HN2MFA steels show a ferrite–austenite phase transition in the 750–810 °C temperature range. This transition was not observed in the duplex steel.

show abstract

Degradation failure features of chromium-plated gun barrels with a laser-discrete-quenched substrate

Cited by 24 publications

References 24 publications

Evaluating high temperature elastic modulus of ceramic coatings by relative method

Evaluating high temperature elastic modulus of ceramic coatings by relative method

Effects of Laser Shock Peening on Microstructure and Properties in 32CrNi3MoVE Steel

Investigation of Thermophysical Properties of Three Barrel Steels

Contact Info

Product

Resources

About