Process development toward full-density stainless steel parts with binder jetting printing

Do, Truong; Kwon, Patrick; Shin, Chang Seop

doi:10.1016/j.ijmachtools.2017.04.006

Cited by 144 publications

(52 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is generally known that up to 8% of delta-ferrite has a negligible effect on mechanical properties and corrosion behavior of steels [57]. Higher sintering temperature could lead to higher density at a cost of dimensional accuracy loss [4,55]. 316L is typically expected to obtain 96 ± 1% final density with acceptable dimensional accuracy [27].…”

Section: Additively Manufactured Ss 316l Partsmentioning

confidence: 99%

“…The infiltrant must be melted at a temperature < melting point or solidus temperature of the bulk material to prevent the part from losing structural integrity [28]. For the stainless steel materials, a low melting material such as bronze is used as an infiltrant which can fill the open pores of the printed powder to improve the final density [4,26]. Cordero et al [105] manufactured ferrous powder via BJ using molten bronze as infiltrant and reported that infiltration could improve the strength of the sintered component by eliminating the stress concentration points at interparticle necks as shown in Figure 13…”

Section: Infiltrationmentioning

confidence: 99%

“…Influence of powder size and shape, sintering profile including time and temperature, sintering additives, sintering atmosphere, and additional heat treatment after sintering (HIP) on the final density, surface roughness, mechanical properties, and dimensional accuracy of BJ manufactured SS 316L parts have been investigated by many researchers [4,14,27,55,56,78,106,107]. However, these studies [4,14,27,55,56,78,106,107] have not been reviewed, summarized and compared in a review article. Table 3 provides an overview of BJ manufactured SS316L.…”

Section: Review Of Previous Studies On Binder Jetting Of Ss 316lmentioning

confidence: 99%

“…BJ printing process can be accelerated by increasing the number of print head nozzles [5,12]. Since the printing process performs at room temperature, no residual stress or distortion is introduced to the part due to thermal gradients [4,5,12,27]. Unbonded powders are fully recyclable so that can be used [26].…”

mentioning

confidence: 99%

“…However, the lack of local melting increases the possibility for the presence of porosity and hinders attaining a high relative density. Before sintering, the relative density of metallic parts created by BJ is typically around 50-60% of the theoretical density which is noticeably lower than the green compacts pressed in powder metallurgy (P/M) process [4,5]. Pores act as high-stress concentration areas promoting crack propagation.…”

mentioning

confidence: 99%

See 4 more Smart Citations

A Review on Binder Jet Additive Manufacturing of 316L Stainless Steel

Mirzababaei

Pasebani

2019

JMMP

153

View full text Add to dashboard Cite

Binder jet additive manufacturing enables the production of complex components for numerous applications. Binder jetting is the only powder bed additive manufacturing process that is not fusion-based, thus manufactured parts have no residual stresses as opposed to laser-based additive manufacturing processes. Binder jet technology can be adopted for the production of various small and large metallic parts for specific applications, including in the biomedical and energy sectors, at a lower cost and shorter lead time. One of the most well-known types of stainless steels for various industries is 316L, which has been extensively manufactured using binder jet technology. Binder jet manufactured 316L parts have obtained near full density and, in some cases, similar mechanical properties compared to conventionally manufactured parts. This article introduces methods, principles, and applications of binder jetting of SS 316L. Details of binder jetting processes, including powder characteristics (shape and size), binder properties (binder chemistry and droplet formation mechanism), printing process parameters (such as layer thickness, binder saturation, drying time), and post-processing sintering mechanism and densification processes, are carefully reviewed. Furthermore, critical factors in the selection of feedstock, printing parameters, sintering temperature, time, atmosphere, and heating rate of 316L binder jet manufactured parts are highlighted and summarized. Finally, the above-mentioned processing parameters are correlated with final density and mechanical properties of 316L components to establish a guideline on feedstock selection and process parameters optimization to achieve desired density, structure and properties for various applications.

show abstract

Section: Additively Manufactured Ss 316l Partsmentioning

confidence: 99%