Predicting sintering window during supersolidus liquid phase sintering of steels using feedstock analysis and CALPHAD

Rangasayee Kannan; Peeyush Nandwana

doi:10.1016/j.matlet.2021.130648

Predicting sintering window during supersolidus liquid phase sintering of steels using feedstock analysis and CALPHAD

Rangasayee Kannan, Peeyush Nandwana

Materials for Advanced Manufacturing

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Binder jet 3D printing results in carbon pickup from the binder at the inter-particle regions during binder burnout. The excess carbon lowers the solidus temperature of the green part locally during supersolidus liquid phase sintering (SLPS). Currently, thermodynamic calculations rely on the use of bulk powder compositions to predict the sintering window. This can overestimate the sintering temperature since the local increase in carbon on powder surfaces is not accounted for, that can locally lower the solidus temperature during SLPS. Here we show that using the inputs from feedstock and binder analysis, the excess carbon and hence the sintering window for the alloy can be predicted using CALPHAD. We present a case study on applying the proposed approach for pressureless sintering of binder jet additive manufactured (BJAM) of H13 steel via SLPS.

Original language	English
Article number	130648
Journal	Materials Letters
Volume	304
DOIs	https://doi.org/10.1016/j.matlet.2021.130648
State	Published - Dec 1 2021

Funding

The authors acknowledge the help of Mr. Derek Siddel of Manufacturing Science Division, ORNL for help with binderjet printing and sintering of the samples. Research was performed at the U.S. Department of Energy’s Manufacturing Demonstration Facility, located at Oak Ridge National Laboratory. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. Research was co-sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office and Vehicle Technologies Office Propulsion Materials Program. The authors acknowledge the help of Mr. Derek Siddel of Manufacturing Science Division, ORNL for help with binderjet printing and sintering of the samples. Research was performed at the U.S. Department of Energy's Manufacturing Demonstration Facility, located at Oak Ridge National Laboratory. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. Research was co-sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office and Vehicle Technologies Office Propulsion Materials Program. Notice of Copyright: This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Funders	Funder number
U.S. Department of Energy
Advanced Manufacturing Office
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory	DE-AC05-00OR22725

Keywords

Binder jet additive manufacturing
CALPHAD
H13
Supersolidus liquid phase sintering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.matlet.2021.130648

Cite this

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title = "Predicting sintering window during supersolidus liquid phase sintering of steels using feedstock analysis and CALPHAD",

abstract = "Binder jet 3D printing results in carbon pickup from the binder at the inter-particle regions during binder burnout. The excess carbon lowers the solidus temperature of the green part locally during supersolidus liquid phase sintering (SLPS). Currently, thermodynamic calculations rely on the use of bulk powder compositions to predict the sintering window. This can overestimate the sintering temperature since the local increase in carbon on powder surfaces is not accounted for, that can locally lower the solidus temperature during SLPS. Here we show that using the inputs from feedstock and binder analysis, the excess carbon and hence the sintering window for the alloy can be predicted using CALPHAD. We present a case study on applying the proposed approach for pressureless sintering of binder jet additive manufactured (BJAM) of H13 steel via SLPS.",

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Predicting sintering window during supersolidus liquid phase sintering of steels using feedstock analysis and CALPHAD

Abstract

Funding

Keywords

UN SDGs

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