NDLI: Analysis of Railgun Barrel Material

Content Provider	IEEE Xplore Digital Library
Author	Cooper, K.P. Jones, H.N. Meger, R.A.
Copyright Year	1965
Abstract	The effect of the number of shots on multiple-launch railgun barrel material performance under significantly high current conditions was studied. Material analysis was conducted on rail samples from four sets of experiments involving increasing number of shots. Cross sections of samples from two locations in the copper rail were examined using a variety of metallographic techniques. During each shot a thin film of molten aluminum from the armature deposited on the rail surface. The deposit became thicker and multilayered with increasing number of shots and was thicker in the bottom half of the vertically oriented rails than in the top half. Preferential removal of material occurred along both rail edges, which resulted in the formation of grooves over the length of the rails. Grooves were deeper near the top edge of the rails compared to the bottom edge. A proposed mechanism for grooving is dissolution of the rail material into molten aluminum flowing toward the rail interior due to aerodynamic drag and over the rail edge due to surface tension effects, assisted by extremely high rail edge temperatures. Asymmetry in the armature-rail gap due to magnetic interactions with the support structure may be the cause of asymmetry in deposit thickness and groove depth
Sponsorship	IEEE Magnetics Society
Starting Page	120
Ending Page	125
Page Count	6
File Size	1304937
File Format	PDF
ISSN	00189464
Volume Number	43
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Railguns Rails Conducting materials Aluminum Copper Sputtering Magnetic materials Aerodynamics Surface tension Temperature railgun Alloying grooving
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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