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首页> 美国政府科技报告 >Ductile Iron Data Base: Correlations Between Microstructure and Fracture Toughness: Background Document for Draft ASTM Ductile Iron Specification
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Ductile Iron Data Base: Correlations Between Microstructure and Fracture Toughness: Background Document for Draft ASTM Ductile Iron Specification

机译：球墨铸铁数据库：微观结构与断裂韧性之间的相关性：asTm球墨铸铁规范草案的背景文件

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A computer data base was generated to relate ductile iron fracture toughness with microstructural parameters, chemistry, and mechanical properties. Such relationships are considered necessary before a ductile iron material specification can be generated for spent nuclear fuel containers. Although scatter exists in the available data and more data are desirable, tentative conclusions can be drawn. In particular, ductile iron with high ferrite content (>80%) and spherical graphite nodules shows relatively high fracture toughness values suggesting its suitability for use in spent nuclear fuel casks. A material specification based upon nodule count (or the inversely related nodule spacing) may ensure a minimum fracture toughness in ductile iron. Increasing nodule spacing (decreasing count) increases the fracture toughness. Other relationships between mechanical properties and microstructure/chemistry are evaluated.

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