Fatigue assessment of as-built and heat-treated Inconel 718 specimens produced by additive manufacturing including notch effects

被引：45

作者：

Solberg, Klas ^{[1
]}

Wan, Di ^{[1
]}

Berto, Filippo ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Mech & Ind Engn, N-7034 Trondheim, Norway

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2020年 / 43卷 / 10期

关键词：

additive materials; fatigue; heat treatment; Inconel; 718; selective laser melting; small defects; MECHANICAL-PROPERTIES; SURFACE-ROUGHNESS; CRACK-GROWTH; MICROSTRUCTURE; TEMPERATURE; SUPERALLOY; TI-6AL-4V; STRENGTH; BEHAVIOR; STRESS;

D O I：

10.1111/ffe.13300

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The fatigue behaviour of notched and unnotched specimens produced by additively manufactured Inconel 718 were analysed in the as-built and heat-treated conditions. The surfaces display high roughness and defects acting as fatigue initiation sites. In the as-built condition, fine subgrains were found, while in in the heat-treated state, the subgrains were removed and the dislocation density recovered. SN-curves are predicted based on tensile properties, hardness and defects obtained by fractography, using thearea-method.

引用

页码：2326 / 2336

页数：11

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