文章基本信息

标题：FATIGUE STRENGTH INVESTIGATION OF FOUR TYPE CAST IRONS SPECIMENS
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作者：Leonavičius M. K. ; Stupak E. ; Krenevičius A. 等
期刊名称：Mechanika
印刷版ISSN：1392-1207
出版年度：2012
卷号：18
期号：3
页码：285-291
DOI：10.5755/j01.mech.18.3.1882
语种：English
出版社：Kauno Technologijos Universitetas
摘要：In this paper data about four types cast irons chemical composition, microstructure, static mechanical properties, durability and cyclic fracture toughness is given. Ultimate stress obtained using cylindrical specimens of diameters 8-14 mm with circular notch are σ u = 403-692 MPa. Endurance limit values of notched specimens are σ 0 = 85-96 MPa. The performed analysis of breaks shows that heterogeneities and defects (voids) formation have an influence on static and cyclic fracture, because they change the crack front and shape of final fracture’s zone. The values of cyclic fracture toughness obtained according to the shape of final fracture’s zone are K c = 10-26 MPa. The obtained data allows deciding about the suitability of cast irons for structural elements production.
关键词：austempered ductile cast iron; durability