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Author Wilson, D.F. ♦ Pawel, S.J. ♦ DeVan, J.H. ♦ Cole, M.J. ♦ Nelson, B.E.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1995
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword Corrosion ♦ Titanium ♦ Testing ♦ Performance evaluation ♦ Water heating ♦ Coils ♦ Tensile stress ♦ Welding ♦ Temperature distribution ♦ Magnetohydrodynamics
Abstract Corrosion testing was performed to demonstrate the compatibility of the titanium vacuum vessel with borated water. Borated water is proposed to fill the annulus of the double wall vacuum vessel to provide effective radiation shielding. Borating the water with 110 grams of boric acid per liter is sufficient to reduce the nuclear heating in the Toroidal Field Coil set and limit the activation of components external to the vacuum vessel. Constant extension rate tensile (CERT) and electrochemical potentiodynamic tests were performed. Results of the CERT tests confirm that stress corrosion cracking is not significant for Ti-6Al-4V or Ti-3Al-2.5V. Welded and unwelded specimens were tested in air and in borated water at 150/spl deg/C. Strength, elongation, and time to failure were nearly identical for all test conditions, and all the samples exhibited ductile failure. Potentiodynamic tests on Ti-6Al-4V and Ti in borated water as a function of temperature showed low corrosion rates over a wide passive potential range. Further, this passivity appeared stable to anodic potentials substantially greater than those expected from MHD effects.
Description Author affiliation: Oak Ridge Nat. Lab., TN, USA (Wilson, D.F.; Pawel, S.J.; DeVan, J.H.; Cole, M.J.; Nelson, B.E.)
ISBN 0780329694
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1995-09-30
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 348.50 kB
Page Count 4
Starting Page 1371
Ending Page 1374

Source: IEEE Xplore Digital Library