The Effect Of Hot Dip Galvanizing On The Fatigue Performance Of Various Grades Of Alloy Spheroidal Graphite Cast Iron.
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A. Els-Botes & D. G. Hattingh
The effect of hot-dip galvanizing on the fatigue performance of various grades of alloy spheroidal graphite cast iron A Els-Botes & D G Hattingh Department of Mechanical Engineering, Port Elizabeth Technikon, South Africa. Abstract Spheroidal graphite irons are versatile materials exhibiting a wide range of properties that are obtained through microstructural manipulation. Graphite is present in a spherical form and do not create stress raisers to the same extent as graphite flakes in gray cast iron. The graphite nodules act as 'crack-arresters' giving spheroidal graphite irons superior ductility and toughness. Under normal conditions, cast irons have a definite fatigue limit, stress below which will give an infinite fatigue life. The fatigue limit of spheroidal graphite cast iron is influenced by the size, shape and distribution of graphite nodules, the volume fractions of inclusions, carbides, dross, and the quantity and location of porosity. Since cast iron are seen