Effects of Defects and Inclusions on the Fatigue Properties of Inconel 718 Fabricated by Laser Powder Bed Fusion Followed by HIP

被引：5

作者：

Ogawahara, Manatsu ^{[1
,3
]}

Sasaki, Shinya ^{[2
]}

机构：

[1] Tokyo Univ Sci, Grad Sch Engn, Dept Mech Engn, Tokyo 1258585, Japan

[2] Tokyo Univ Sci, Dept Mech Engn, Tokyo 1258585, Japan

[3] Tokyo Univ Sci, Tokyo, Japan

来源：

MATERIALS TRANSACTIONS | 2021年 / 62卷 / 05期

关键词：

laser powder bed fusion; Inconel; 718; fatigue; defect; inclusion;

D O I：

10.2320/matertrans.Y-M2021804

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fatigue properties of parts fabricated by laser powder bed fusion, a kind of additive manufacturing, are inferior to those of conventional materials. Defects and inclusions are the causes of low fatigue properties, but their effect is not clarified. Inconel 718 specimens were fabricated by laser powder bed fusion. Cross-sectional observation and fatigue tests were performed. Gas porosity, cracks, and inclusions were observed in cross-section. TiN inclusions were observed in the fatigue fracture origins for specimens with hot isostatic pressing. To enhance the fatigue properties of Inconel 718 fabricated by laser powder bed fusion, it was suggested to remove entirely TiN inclusions within the powder.

引用

页码：631 / 635

页数：5

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