Influence of initial relative densities on the sintering behavior and mechanical behavior of 316 L stainless steel fabricated by binder jet 3D printing

Chen, Zhiping; Chen, Weiping; Chen, Ling; Zhu, Daoben; Chen, Qiang; Fu, Zhaohui

doi:10.1016/j.mtcomm.2022.103369

Cited by 8 publications

(1 citation statement)

References 33 publications

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“…The simulation results are in good agreement with the density experimentally measured by Archimedes' test. Hence, it is possible to conclude that densification increases with the increase of initial density, by contrast the shrinkage decreases as the initial density increases [33].…”

Section: Dimensional Change On Sintering Of Linear Dimensionsmentioning

confidence: 92%

Influence of shape distortion on the precision of holes in parts fabricated by metal binder jetting

Zago

Lecis

Mariani

et al. 2023

Int J Interact Des Manuf

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Metal binder jetting (MBJ) is an additive manufacturing (AM) technology split into two process steps: printing and sintering. Firstly, product is built up layer-by-layer by the selective deposition of a binder agent on a powder bed. Secondly, a thermal treatment (sintering) consolidates the metal structure. MBJ is currently becoming more and more attractive on the reason of high potential scalability, cost-effective production and wide range of available material feedstocks. However, the transition towards industrial scale production is restrained by the critical control of dimensional and geometrical precision of parts after sintering operation. In fact, product geometry is affected by anisotropic dimensional change or even shape distortion. This study aims at investigating the dimensional and geometrical precision of through holes. Three sample geometries were designed, having a through hole with axis perpendicular to the building direction and located at different levels along sample height. Samples were measured by a coordinate measuring machine before and after sintering, in order to assess the shrinkage and any shape change. Results highlight the inhomogeneous volumetric and linear shrinkage of the three geometries, which is influenced by the printing position in the building plane. A macroscopic deformation of parallelepiped geometry was also evidenced, caused by the superposition of layer shifting originated on printing, and by the frictional forces between sample surface and alumina support during sintering. Such distortion significantly affects the shrinkage and form error of holes.

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Section: Dimensional Change On Sintering Of Linear Dimensionsmentioning

confidence: 92%

Influence of shape distortion on the precision of holes in parts fabricated by metal binder jetting

Zago

Lecis

Mariani

et al. 2023

Int J Interact Des Manuf

View full text Add to dashboard Cite

show abstract

Binder Jetting‐based Metal Printing

Mariani,

Lecis,

Mostafaei

2024

Solid‐State Metal Additive Manufacturing

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Additively Manufactured Stainless Steel Wind Tunnel Model Support Featuring Honeycomb Structures for Vibration Attenuation

Fu,

Peng,

Zhang

et al. 2024

Adv Eng Mater

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Wind tunnel model support (WTMS) is an indispensable component of wind tunnel testing. However, the presence of vibrations within the model‐support system can compromise the accuracy of data and give rise to significant safety hazards. In this study, an approach for vibration attenuation by incorporating honeycomb structures into the design of the WTMS is proposed. To this end, stainless steel WTMSs with integrated honeycomb structures are fabricated by selective laser melting (SLM). Results showed that stainless steels prepared under optimized SLM processing parameters exhibit high crystallinity and consist of single‐phase Fe–Cr–Ni alloy. The stainless steels exhibited robust mechanical properties, including a tensile strength of ≈1 GPa, an elongation of ≈8%, and a compressive strength of ≈1.4 GPa. These exceptional mechanical properties can be attributed to the formation of a cellular structure and tangled dislocations. The first‐order and the third‐order resonant response of WTMS honeycomb structures can be effectively reduced. The vibration reduction mechanism can be attributed to the occurrence of local resonance when the natural frequency of the internal periodic unit of the WTMS closely matched the vibration frequency of the model. The utilization of honeycomb structures holds significant potential for achieving vibration attenuation in WTMS.

show abstract

Influence of initial relative densities on the sintering behavior and mechanical behavior of 316 L stainless steel fabricated by binder jet 3D printing

Cited by 8 publications

References 33 publications

Influence of shape distortion on the precision of holes in parts fabricated by metal binder jetting

Influence of shape distortion on the precision of holes in parts fabricated by metal binder jetting

Binder Jetting‐based Metal Printing

Additively Manufactured Stainless Steel Wind Tunnel Model Support Featuring Honeycomb Structures for Vibration Attenuation

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