Productivity-oriented SLM process parameters effect on the fatigue strength of Inconel 718

被引：22

作者：

Macoretta, G. ^{[1
]}

Bertini, L. ^{[1
]}

Monelli, B. D. ^{[1
]}

Berto, F. ^{[2
]}

机构：

[1] Univ Pisa, Dept Civil & Ind Engn, Largo Lucio Lazzarino 2, I-56126 Pisa, Italy

[2] Sapienza Univ Rome, Dept Chem Engn Mat Environm, Via Eudossiana 18, I-00184 Rome, Italy

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 168卷

关键词：

Selective laser melting; S-N curves; High cycle fatigue; Surface roughness; Defects; RESIDUAL-STRESSES; MEAN STRESS; DEFECTS; MICROSTRUCTURE;

D O I：

10.1016/j.ijfatigue.2022.107384

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The low productivity of the SLM process is known to be a limiting factor, but speeding up the process can lead to material defects. Two sets of SLM process parameters enhancing its productivity by 50 % were devised and tested in comparison with baseline sets, in terms of material microstructure, porosity, surface roughness, static mechanical properties, and HCF behavior, in the as-built and aged conditions. The as-built surface was investigated. Despite a significant increase in the porosity and surface roughness, the fatigue strength was reduced by 5 %. The Murakami root area(R) parameter effectively correlates the fatigue strength and surface roughness variations.

引用

页数：17

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