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Title:In Process Measurement of Hydrogen In Welding
Author(s):White, Dawn Roberta
Department / Program:Mechanical Engineering
Discipline:Mechanical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Mechanical
Abstract:The deleterious effects of atomic, or diffusible, hydrogen dissolved in welds on their mechanical properties have been known for over four decades. However, post weld inspection and repair of hydrogen induced cracks in welds remains the only means of correcting the defects produced by excess hydrogen in the arc atmosphere during welding. In this study, a spectroscopic technique for measuring the amount of hydrogen in the arc atmosphere during welding is presented. A relationship between the amount of hydrogen present in the weld arc atmosphere during welding and the diffusible hydrogen content of the resulting weld is developed. The results of mechanical tests are used to determine the hydrogen induced cracking susceptibility of an armor steel. The amount of hydrogen present in the arc atmosphere during welding is correlated with the mechanical properties of the weld. Methods for applying this work to real time detection of conditions likely to produce hydrogen induced cracking of production welds, and thereby reduce the amount of nondestructive inspection and weld repair required later, are suggested.
Issue Date:1986
Description:172 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1986.
Other Identifier(s):(UMI)AAI8701653
Date Available in IDEALS:2014-12-15
Date Deposited:1986

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