Microstructure, texture, and anisotropic mechanical behavior of selective laser melted maraging stainless steels

Sanjari, Mehdi; Mahmoudiniya, Mahdi; Pirgazi, Hadi; Tamimi, Saeed; Ghoncheh, M.H.; Shahriairi, Ayda; Hadadzadeh, Amir; Amirkhiz, Babak Shalchi; Purdy, Mackenzie; Araujo, Edgar Gomes de; Kestens, Léo; Mohammadi, Mohsen

doi:10.1016/j.matchar.2022.112185

Cited by 21 publications

(4 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the high temperature, the heating time was insufficient for complete homogenisation and recrystallization of the microstructure. Significantly, given that lath martensite transformed to austenite microstructure during heating to hot deformation temperature, identification of prior-austenite grains (PAGS) are much more important [ 5 , 25 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Hot Deformation Behaviour of Additively Manufactured 18Ni-300 Maraging Steel

et al. 2023

View full text Add to dashboard Cite

In this article, hot compression tests on the additively produced 18Ni-300 maraging steel 18Ni-300 were carried out on the Gleeble thermomechanical simulator in a wide temperature range (900–1200 °C) and at strain rates of 0.001 10 s−1. The samples were microstructurally analysed by light microscopy and scanning electron microscopy with electron backscatter diffraction (EBSD). This showed that dynamic recrystallization (DRX) was predominant in the samples tested at high strain rates and high deformation temperatures. In contrast, dynamic recovery (DRV) dominated at lower deformation temperatures and strain rates. Subsequently, the material constants were evaluated in a constitutive relationship using the experimental flow stress data. The results confirmed that the specimens are well hot workable and, compared with the literature data, have similar activation energy for hot working as the conventionally fabricated specimens. The findings presented in this research article can be used to develop novel hybrid postprocessing technologies that enable single-stage net shape forging/forming of AM maraging steel parts at reduced forming forces and with improved density and mechanical properties.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Recently, maraging steels have become one of the most interesting materials in rapid prototyping due to their good printability and excellent response to LPBF [ 3 , 4 , 5 ]. High-quality, nearly fully dense parts have been successfully produced.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behaviour of Additively Manufactured 18Ni-300 Maraging Steel

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The inherent layer-by-layer nature of L-PBF introduces microstructural anisotropy that can influence hardness and other mechanical properties [57][58][59]. Variations in thermal gradients during the build process, influenced by process parameters, can lead to localised grain structure and precipitate distribution differences.…”

Section: Phase 2|selected Supplier: Further Characterisation and Eval...mentioning

confidence: 99%

Benchmarking L-PBF Systems for Die Production: Powder, Dimensional, Surface, Microstructural and Mechanical Characterisation

Costa,

Sequeiros,

Santos

et al. 2024

Metals

View full text Add to dashboard Cite

While conventional die manufacturing techniques often lead to limitations in production speed and design intricacy due to labour-intensive procedures like machining and casting, Additive Manufacturing (AM) emerges as a key player offering substantial potential for cost reduction and process improvement in mass production. This study benchmarks four leading Laser Powder Bed Fusion (L-PBF) systems for producing maraging steel (EN 1.2709) dies. Despite the shared material and technology, variations in dimensional accuracy, surface finish, and microstructure were observed among the maraging steel parts. SEM/EDS, EBSD, hardness testing, and dimensional analysis revealed system-specific performance differences. Additionally, select parts underwent heat treatment and tensile testing, demonstrating the impact of post-processing on mechanical properties. These results offer valuable guidance for industrial stakeholders considering AM, highlighting the importance of supplier selection and process optimisation for achieving consistent part quality and unlocking the full potential of AM technologies.

show abstract

“…Therefore, the processing of PH 13-8Mo by AM methods is gaining attention. Researchers have started to investigate the PH 13-8Mo alloys using both wire arc additive manufacturing (WAAM) [4,5] and laser-powder bed fusion (L-PBF) processes [6,7]. Even though microstructure and mechanical properties of PH 13-8Mo have been studied with different AM processes, there is very limited literature on the laser metal deposition process with powder as feedstock (LMDp), also known as laser-based directed energy deposition (DED-LB) of PH 13-8Mo.…”

Section: Introductionmentioning

confidence: 99%

Towards Laser Metal Deposition of Modified PH 13-8Mo Powder

Aydin,

Şelte,

Andersson

et al. 2023

KEM

View full text Add to dashboard Cite

Modified PH 13-8Mo alloy exhibits a good combination of corrosion resistance and mechanical properties for demanding applications in aerospace, petrochemical, and tooling industries. Additive manufacturing, specifically the laser metal deposition process with powder as feedstock (LMDp), has the potential to be utilized in these industries. However, very limited knowledge on the LMDp of this alloy currently exists. The aim of this work was, therefore, to deposit a multi-track single layer of modified PH 13-8Mo alloy as a first step towards 3D geometries, and to analyze the resulting microstructure by using Optical Microscopy, Scanning Electron Microscopy, X-Ray Diffraction, Electron Backscatter Diffraction, and micro-hardness. It was found that the multi-track single layer was free from major defects. The microstructure was heterogeneous, and it consisted of a martensitic matrix and small amounts of δ ferrite, austenite, and AlN. The results of this research will be used to tailor the microstructure and properties of future 3D additively manufactured components.

show abstract

Microstructure, texture, and anisotropic mechanical behavior of selective laser melted maraging stainless steels

Cited by 21 publications

References 58 publications

Hot Deformation Behaviour of Additively Manufactured 18Ni-300 Maraging Steel

Hot Deformation Behaviour of Additively Manufactured 18Ni-300 Maraging Steel

Benchmarking L-PBF Systems for Die Production: Powder, Dimensional, Surface, Microstructural and Mechanical Characterisation

Towards Laser Metal Deposition of Modified PH 13-8Mo Powder

Contact Info

Product

Resources

About