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https://hdl.handle.net/2142/70141
Description
Title
In Process Measurement of Hydrogen In Welding
Author(s)
White, Dawn Roberta
Issue Date
1986
Department of Study
Mechanical Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(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.
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