Effect of post-treatments on the fatigue behaviour of 316L stainless steel manufactured by laser powder bed fusion

被引：150

作者：

Elangeswaran, Chola ^{[1
,2
]}

Cutolo, Antonio ^{[1
,2
]}

Muralidharan, Gokula Krishna ^{[3
]}

de Formanoir, Charlotte ^{[1
]}

Berto, Filippo ^{[4
]}

Vanmeensel, Kim ^{[5
]}

Van Hooreweder, Brecht ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Mech Engn, Celestijnenlaan 300, B-3001 Leuven, Belgium

[2] SIM M3 Program, Technol Pk 935, B-9052 Zwijnaarde, Belgium

[3] 3D Syst Leuven, Grauwmeer 14, B-3001 Leuven, Belgium

[4] Norwegian Univ Sci & Technol NTNU, Dept Mech & Ind Engn, N-7491 Trondheim, Norway

[5] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44, B-3001 Leuven, Belgium

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2019年 / 123卷

关键词：

Additive manufacturing; Stainless steel; S-N curves; Surface treatments; Ductility; CRACK GROWTH-BEHAVIOR; FRACTURE; PERFORMANCE; TENSILE; METALS;

D O I：

10.1016/j.ijfatigue.2019.01.013

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper investigates the influence of post treatments on the fatigue properties of 316L stainless steel produced by laser powder bed fusion. Miniaturised fatigue samples are built in vertical orientation with optimised process conditions to result in very low porosities and minimal scatter in results. Fatigue performance is evaluated for two different material conditions: as-built and stress-relieved, at a nominal load ratio of -1. Furthermore, the samples are tested with and without surface machining. A thorough microstructural and fractographic analysis is performed to evaluate the impact of the main fatigue influencing factors. The results show that the fatigue behaviour of machined samples with and without stress relief heat treatment exceeds that of conventionally manufactured 316L.

引用

页码：31 / 39

页数：9

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