The effect of surface indentations on gouging in railguns

被引:28
作者
Watt, Trevor J. [1 ]
Clay, Charys E. [2 ]
Bassett, Philip M. [3 ]
Bourell, David L. [1 ]
机构
[1] Univ Texas Austin, Dept Mech Engn, Austin, TX 78758 USA
[2] Univ Texas Austin, Dept Architectural Engn, Austin, TX 78758 USA
[3] Georgia Tech Univ, Dept Mech Engn, Atlanta, GA 30332 USA
关键词
Railgun; High-speed sliding; Hypervelocity gouging; Aluminum; Copper;
D O I
10.1016/j.wear.2013.12.017
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Hypervelocity gouging occurs in high speed sliding systems such as rocket sled test tracks, light gas guns, and electromagnetic railguns. Gouging takes the form of teardrop-shaped craters on the rail surface, and occurs above a threshold speed which is dependent on the slider and rail materials. In this study, gouging of aluminum railgun armatures on flat and indented copper rails was performed to examine the effect of macroscopic surface defects on gouge onset velocity and morphology. Both galling and gouge craters were shown to initiate at existing macroscopic and microscopic defects. Macroscopically flat rail surfaces provide no practical advantage over indented surfaces insofar as gouge onset velocity is concerned. However, the shape of the resulting gouge craters can be significantly affected. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:41 / 50
页数:10
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