Analytical models for initial and intermediate stages of sintering of additively manufactured stainless steel

Rios, Alberto Cabo; Olevsky, Eugene A.; Hryha, Eduard; Persson, Mats; Bordia, Rajendra K.

doi:10.1016/j.actamat.2023.118822

Cited by 11 publications

(2 citation statements)

References 35 publications

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“…To densify it close to the theoretical density, in practice cases, a trial-and-error methodology is often carried out to obtain the optimized processing parameters and container geometry, which is highly costly and labor-intensive [15][16][17][18][19]. To address this, a new strategy of "simulation prediction, experimental validation" has demonstrated the advantage of accelerating the discovery of optimized parameters in an efficient and economic manner [20][21][22][23][24][25]. In this research, we provided a case showing the effect of temperature on relative density during HIP.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Metal Powder Densification under Hot Isostatic Pressing

Wang,

Srivatsa,

et al. 2024

Materials

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The consolidation of metal powders is a complex thermomechanical process, and the temperature has a significant effect on the density distribution in the compact. The consolidation process of metal powders with an average particle size of 10 μm, 25 μm, and 50 μm under hot isostatic pressure was simulated by finite element modeling. The distribution and evolution of the relative density after being hot isostatic pressing (HIP) under 1050 °C/130 MPa/4 h, 1150 °C/130 MPa/4 h, and 1250 °C/130 MPa/4 h conditions were simulated, respectively. The experimental data of HIP at 1050 °C/130 MPa/4 h were used to verify the modeling results via the geometric change in the container. The relative density difference between the simulated results and the experimental results at different positions was less than 2%. This methodology called “modeling prediction, experimental validation” can accelerate experimental discovery in an economic manner.

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Section: Introductionmentioning

confidence: 99%

Modeling of Metal Powder Densification under Hot Isostatic Pressing

Wang,

Srivatsa,

et al. 2024

Materials

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“…In addition, the oversimplified geometry, including the approximation around neck area, the shape and size distribution of real powder, are also considerations that have not been fully incorporated in one particular model to be applied universally. To tackle this issue, some models have been developed to be applicable to more than a single stage during sintering [85,86]. For example, the Master Sintering Curve (MSC), which was originally derived from the combined-stage model [87,88].…”

Section: Processing Variablesmentioning

confidence: 99%

Site-specific control of alloy property through binder jet 3D printing

Chiang

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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.

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Analytical models for initial and intermediate stages of sintering of additively manufactured stainless steel

Cited by 11 publications

References 35 publications

Modeling of Metal Powder Densification under Hot Isostatic Pressing

Modeling of Metal Powder Densification under Hot Isostatic Pressing

Site-specific control of alloy property through binder jet 3D printing

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

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