Neutron Diffraction Analysis of Residual Stresses near Unannealed Welds in Anhydrous Ammonia Nurse Tanks
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2014-01-01
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Materials Science and Engineering
Materials engineers create new materials and improve existing materials. Everything is limited by the materials that are used to produce it. Materials engineers understand the relationship between the properties of a material and its internal structure — from the macro level down to the atomic level. The better the materials, the better the end result — it’s as simple as that.
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Materials Science and Engineering
Abstract
Neutron diffraction analysis was employed to measure residual stresses near welds in used anhydrous ammonia nurse tanks. Tensile residual stresses contribute to stress corrosion cracking of nurse tanks, which can cause tanks to release toxic ammonia vapor. The analysis showed that tensile residual stresses were present in the tanks measured, and the magnitudes of these stresses approached the yield strength of the steel. Implications for agricultural safety and health are discussed.
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This article is from Journal of Agricultural Safety and Health (2014): 3–13, doi:10.13031/jash.20.9858.