NDLI: Inductive heating of materials for the study of high-temperature mechanical properties.

Content Provider	IEEE Xplore Digital Library
Author	Wetz, D. Surls, D. Landen, D. Satapathy, S. Crawford, M.
Copyright Year	2007
Description	Author affiliation: Institute for Advanced Technology, The University of Texas at Austin, 3925 W. Braker Ln., Suite 400, 78759, USA (Wetz, D.; Surls, D.; Landen, D.; Satapathy, S.; Crawford, M.)
Abstract	In any high-energy pulsed power experiment, the metallic conductors are expected to heat up significantly due to resistive losses. In the pulsed case, the effects of local heat transfer are decreased due to limited thermal diffusion, so the process is considered to be adiabatic rather than isothermal. Experimental evidence from electron beam heating indicates that high-temperature mechanical properties significantly depend on the rapidity and duration of heat deposition. With this in mind, it is important to understand the mechanical properties of metals when heated rapidly so that the correct mechanical properties are considered when designing high-energy experiments such as railguns, where both thermal and mechanical stresses are high. An expanding ring experiment, similar to the one originally designed by Gourdin et al. [1,2] has been set up at the Institute for Advanced Technology (IAT) to test such mechanical properties [3]. The experiment uses a primary coil driven with current pulse from a near critically damped RLC circuit that causes a thin specimen ring to expand and fragment due to the induced electromagnetic forces. In order to determine material properties at elevated temperatures, an inductive heating source has been developed to rapidly heat the ring specimen to temperatures as high as the melting temperature in a few milliseconds, immediately prior to the application of electromagnetic expansion forces. The source employs a microprocessor-controlled pumped LC tank circuit with a resonant frequency of roughly 25 kHz to induce a current into the ring. The current in the primary and secondary coils are measured using Pearson and Rogowski coils. A VISAR is used to measure the expansion speed of the ring, and a high-speed camera is used to capture the dynamic fragmentation of the ring. The data generated will quantify the rate of heating sensitivity of material properties in commonly used materials for development and validation of appropriate constitutive equations.
Starting Page	1740
Ending Page	1744
File Size	381970
Page Count	5
File Format	PDF
ISBN	9781424409136
DOI	10.1109/PPPS.2007.4652528
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heating Capacitors Insulated gate bipolar transistors Stress Electromagnetics RLC circuits Optical switches
Content Type	Text
Resource Type	Article

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
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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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