scholarly journals Directional fatigue behaviour of maraging steel grade 300 produced by laser powder bed fusion

2021 ◽  
pp. 106229
Author(s):  
Klas Solberg ◽  
Even Wilberg Hovig ◽  
Knut Sørby ◽  
Filippo Berto
Keyword(s):  
Maraging Steel ◽  
Fatigue Behaviour ◽  
Steel Grade ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

scholarly journals A Review of Factors Affecting the Mechanical Properties of Maraging Steel 300 Fabricated via Laser Powder Bed Fusion

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1273 ◽  
Author(s):  
Barry Mooney ◽  
Kyriakos Kourousis
Keyword(s):  
Mechanical Properties ◽  
Maraging Steel ◽  
Processing Parameters ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Factors Affecting ◽  
Powder Bed ◽  
Porosity Defects ◽  
Research Findings ◽  
Microstructure Density

Maraging steel is an engineering alloy which has been widely employed in metal additive manufacturing. This paper examines manufacturing and post-processing factors affecting the properties of maraging steel fabricated via laser powder bed fusion (L-PBF). It covers the review of published research findings on how powder quality feedstock, processing parameters, laser scan strategy, build orientation and heat treatment can influence the microstructure, density and porosity, defects and residual stresses developed on L-PBF maraging steel, with a focus on the maraging steel 300 alloy. This review offers an evaluation of the resulting mechanical properties of the as-built and heat-treated maraging steel 300, with a focus on anisotropic characteristics. Possible directions for further research are also identified.

On the constitutive relationship between solidification cells and the fatigue behaviour of IN718 fabricated by laser powder bed fusion

2021 ◽  
pp. 102347
Author(s):  
Alessandro Piglione ◽  
Bonnie Attard ◽  
Vitor Vieira Rielli ◽  
Claudia-Tatiana Santos Maldonado ◽  
Moataz M. Attallah ◽  
...  
Keyword(s):  
Fatigue Behaviour ◽  
Constitutive Relationship ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

scholarly journals Effect of Surface and Subsurface Defects on Fatigue Behavior of AlSi10Mg Alloy Processed by Laser Powder Bed Fusion (L-PBF)

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1063 ◽  
Author(s):  
Milad Hamidi Nasab ◽  
Alessandro Giussani ◽  
Dario Gastaldi ◽  
Valeria Tirelli ◽  
Maurizio Vedani
Keyword(s):  
Crack Nucleation ◽  
Fatigue Behavior ◽  
Fatigue Behaviour ◽  
Surface Finishing ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Finishing Processes ◽  
Effect Of Surface ◽  
Subsurface Defects

The fatigue behaviour of an AlSi10Mg alloy processed by laser powder bed fusion (L-PBF) and subjected to different surface finishing processes was investigated paying special attention to the residual defects on the surface and the dominant fatigue failure mechanisms. Roughness measurements and qualitative surface morphology analysis showed smooth surfaces in the case of vibro-finishing and machining followed by polishing. The fatigue performance did not reveal to be directly related to surface roughness, but residual intrusions left on the finished surfaces. Post-mortem analysis showed single- or multiple-crack nucleation from pores opened on the surface, un-melted powders, or spatters considered as typical L-PBF defects. A fatigue limit of 195 MPa for machined and polished samples was obtained by substantial removal of surface and subsurface defects.

scholarly journals Influence of metal powder cross-contaminations on part quality in Laser Powder Bed Fusion: copper alloy particles in maraging steel feedstock

Procedia CIRP ◽  
2020 ◽  
Vol 94 ◽  
pp. 167-172
Author(s):  
Max Horn ◽  
Lukas Langer ◽  
Mario Schafnitzel ◽  
Simone Dietrich ◽  
Georg Schlick ◽  
...  
Keyword(s):  
Metal Powder ◽  
Maraging Steel ◽  
Copper Alloy ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Part Quality ◽  
Alloy Particles

On the effect of laser powder-bed fusion process parameters on quasi-static and fatigue behaviour of Hastelloy X: A microstructure/defect interaction study

2021 ◽  
Vol 38 ◽  
pp. 101805
Author(s):  
Reza Esmaeilizadeh ◽  
Ali Keshavarzkermani ◽  
Usman Ali ◽  
Behzad Behravesh ◽  
Ali Bonakdar ◽  
...  
Keyword(s):  
Process Parameters ◽  
Fatigue Behaviour ◽  
Fusion Process ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Interaction Study ◽  
Hastelloy X ◽  
Powder Bed ◽  
Defect Interaction

scholarly journals HEAT TREATMENT EFFECT ON MARAGING STEEL MANUFACTURED BY LASER POWDER BED FUSION TECHNOLOGY: MICROSTRUCTURE AND MECHANICAL PROPERTIES

2021 ◽  
Vol 27 (3) ◽  
pp. 122-126
Author(s):  
Giulia Stornelli ◽  
Damiano Gaggia ◽  
Marco Rallini ◽  
Andrea Di Schino
Keyword(s):  
Heat Treatment ◽  
Maraging Steel ◽  
Treatment Effect ◽  
Annealing Treatment ◽  
Ageing Temperature ◽  
Powder Bed Fusion ◽  
Solution Annealing ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Hardening Treatment

Laser Powder Bed Fusion (L-PBF) is a widespread additive manufacturing technology in industrial applications, for metal components manufacturing. Maraging steel is a special class of Fe-Ni alloys, typically used in the aerospace and tooling sectors due to their good combination of mechanical strength and toughness. This work analyses the heat treatment effect on the microstructure and hardness value of 300-grade maraging steel manufactured by the L-PBF process. The considered heat treatment consists of a solution annealing treatment followed by quenching and ageing hardening treatment. The effect of ageing temperature is reported, in a wide temperature range. Results show that solution annealing treatment fully dissolves the solidification structure caused by the L-PBF process. Moreover, the ageing hardening treatment has a significant impact on the hardness, hence on strength, of L-PBF maraging steel. The optimal ageing conditions for the L-PBF maraging steel are identified and reported: in particular, results show that the hardness of 583 HV is achieved following ageing treatment at 490 °C for 6 hours. A higher treatment temperature leads to over-ageing resulting in a decrease of hardness. Conversely, an excessive ageing time does not seem to affect the hardness value, for the ageing temperature of 490 °C.

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