Influence of post-process heat treatments on the fatigue crack propagation behaviour of a PBF-LB/M AlSi10Mg alloy

被引：18

作者：

Roveda, Ilaria ^{[1
]}

Serrano-Munoz, Itziar ^{[1
]}

Haubrich, Jan ^{[2
]}

Requena, Guillermo ^{[2
,3
]}

Madia, Mauro ^{[1
]}

机构：

[1] Bundesanstalt Mat forsch & prufung BAM, Unter Eichen 87, D-12205 Berlin, Germany

[2] German Aerosp Ctr DLR, Inst Mat Res, D-51147 Cologne, Germany

[3] Rhein Westfal TH Aachen, Met Struct & Mat Syst Aerosp Engn, D-52062 Aachen, Germany

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 175卷

关键词：

Additive manufacturing; Fatigue crack growth; Cyclic R-curve; Heat treatment; LASER-MELTED ALSI10MG; POWDER BED FUSION; MECHANICAL-PROPERTIES; GROWTH-CHARACTERISTICS; METALLIC COMPONENTS; ALUMINUM-ALLOYS; MICROSTRUCTURE; THRESHOLD; SOLIDIFICATION; TEMPERATURE;

D O I：

10.1016/j.ijfatigue.2023.107808

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The microstructure has a great influence on short fatigue crack growth in metallic materials. Laser-based Powder Bed Fusion AlSi10Mg alloys exhibit in the as-built condition a fine fibrous Si structure and a supersaturated solid solution of Si in the & alpha;-Al matrix, which is significantly modified by heat treatments starting already at tem-peratures under 260 & DEG;C. This study focuses on the influence of post-process heat treatments on the micro-structural evolution and the resulting fatigue crack growth resistance. As compared to the as-built condition, two heat treatments at 265 & DEG;C/1 h and at 300 & DEG;C/2 h are found to be beneficial to the fatigue crack growth resistance of the investigated material.

引用

页数：12

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