The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. However, please pay special attention to the individual works to make sure there are no copyright restrictions indicated. Individual works may require securing other permissions from the original copyright holder.
FEDLINK - United States Federal Collection jresv64Cn2p147 (User talk:Fæ/IA books#Fork8) (batch 1000-3000 #190555)
Использование файла
Нет страниц, использующих этот файл.
Метаданные
Файл содержит дополнительные данные, обычно добавляемые цифровыми камерами или сканерами. Если файл после создания редактировался, то некоторые параметры могут не соответствовать текущему изображению.
Краткое название
Effect of oleophobic films on metal fatigue.
Название изображения
The fatigue strengths of a low-alloy steel, a magnesium alloy, and a copper-beryllium alloy were increased by coating the specimens with certain polar organic compounds. Also the dispersion of the results was much less for coated specimens of those materials than for clean ones. Similar tests showed no effect with titanium or 6061 aluminum alloy, and only a slight improvement for 17-7 PH stainless steel. The full beneficial effect of the coatings was found only with compounds having a carbon chain of at least twelve, and this effect was not significantly reduced when the coated specimens were tested in water. Organic solvents (benzene and xylene) had a deleterious effect on the fatigue life of materials that were improved by oleophobic coatings. It is suggested that the effect of the coatings is principally due to their ability to present a barrier to water and oxygen molecules.