Electrical and magnetic techniques for monitoring arc behaviour during VAR of INCONEL 718:: Results for different operating conditions

Robin Ward; Michael Jacobs

doi:10.1023/B:JMSC.0000048724.99705.e7

Electrical and magnetic techniques for monitoring arc behaviour during VAR of INCONEL 718: Results for different operating conditions

Robin Ward, Michael Jacobs

Metallurgy and Materials

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Novel instrumentation and computer modelling are described which have been developed to detect and interpret current flows and magnetic fields during VAR. Results from different operating conditions during VAR of 20" diameter ingots of INCONEL 718 at Special Metals Wiggin Ltd., Hereford are presented and discussed with reference to macrostructural findings. It is shown that the results support the viability of the measurement techniques, and that the techniques are capable of detecting subtle changes in arc behaviour. Freckles were formed under one set of experimental conditions, and it is shown that the distribution of the radial location of the arc centre (obtained from the magnetic field analysis) may help to explain this.

Original language	English
Pages (from-to)	7135-7143
Number of pages	9
Journal	Journal of Materials Science
Volume	39
Issue number	24
DOIs	https://doi.org/10.1023/B:JMSC.0000048724.99705.e7
Publication status	Published - 1 Dec 2004
Event	International Symposium on LIquid Metal Processing and Casting - Paris Duration: 1 Jan 2003 → …

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title = "Electrical and magnetic techniques for monitoring arc behaviour during VAR of INCONEL 718:: Results for different operating conditions",

abstract = "Novel instrumentation and computer modelling are described which have been developed to detect and interpret current flows and magnetic fields during VAR. Results from different operating conditions during VAR of 20{"} diameter ingots of INCONEL 718 at Special Metals Wiggin Ltd., Hereford are presented and discussed with reference to macrostructural findings. It is shown that the results support the viability of the measurement techniques, and that the techniques are capable of detecting subtle changes in arc behaviour. Freckles were formed under one set of experimental conditions, and it is shown that the distribution of the radial location of the arc centre (obtained from the magnetic field analysis) may help to explain this.",

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AB - Novel instrumentation and computer modelling are described which have been developed to detect and interpret current flows and magnetic fields during VAR. Results from different operating conditions during VAR of 20" diameter ingots of INCONEL 718 at Special Metals Wiggin Ltd., Hereford are presented and discussed with reference to macrostructural findings. It is shown that the results support the viability of the measurement techniques, and that the techniques are capable of detecting subtle changes in arc behaviour. Freckles were formed under one set of experimental conditions, and it is shown that the distribution of the radial location of the arc centre (obtained from the magnetic field analysis) may help to explain this.

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JO - Journal of Materials Science

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IS - 24

Y2 - 1 January 2003

ER -

Electrical and magnetic techniques for monitoring arc behaviour during VAR of INCONEL 718: Results for different operating conditions

Abstract

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