scholarly journals Post‐treatment selection for tailored fatigue performance of 18Ni300 maraging steel manufactured by laser powder bed fusion

2020 ◽  
Vol 43 (10) ◽  
pp. 2359-2375
Author(s):  
Chola Elangeswaran ◽  
Kopila Gurung ◽  
Raphael Koch ◽  
Antonio Cutolo ◽  
Brecht Van Hooreweder
Keyword(s):  
Maraging Steel ◽  
Treatment Selection ◽  
Post Treatment ◽  
Fatigue Performance ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Selection For

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.

Low-cycle fatigue performance of remelted laser powder bed fusion (L-PBF) biomedical Ti25Ta

2020 ◽  
Vol 798 ◽  
pp. 140228 ◽  
Author(s):  
Erin G. Brodie ◽  
Julia Richter ◽  
Thomas Wegener ◽  
Thomas Niendorf ◽  
Andrey Molotnikov
Keyword(s):  
Low Cycle Fatigue ◽  
Fatigue Performance ◽  
Powder Bed Fusion ◽  
Cycle Fatigue ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

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

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.

scholarly journals HIGH CYCLE FATIGUE PERFORMANCE OF TI6AL4V(ELI) SPECIMENS PRODUCED WITH INHERENT LASER POWDER BED FUSION SURFACE ROUGHNESS

2021 ◽  
Vol 32 (3) ◽  
pp. 248-257
Author(s):  
Hlakae Patrick Miya ◽  
Willie Bouwer du Preez ◽  
Lehlohonolo Francis Monaheng
Keyword(s):  
Surface Roughness ◽  
Surface Defects ◽  
Fatigue Testing ◽  
Fatigue Performance ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Heat Treated ◽  
Initiation And Propagation ◽  
Cycles To Failure

This study investigated how surface defects affect the fatigue performance of laser powder bed fusion (LPBF) Ti6Al4V(ELI) test specimens in as-built surface roughness and heat-treated conditions. Tensile and fatigue specimens were built in three orthogonal directions for testing. Fatigue testing was carried out to determine the maximum stress at which a run-out number of 5 million cycles to failure could be achieved. Fractured specimens were analysed and compared for crack initiation and propagation characteristics using scanning electron microscopy. Conclusions were drawn on the possibility of producing Ti6Al4V(ELI) aircraft components through LPBF.

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