Strategy for Texture Management in Metals Additive Manufacturing

Kirka, Michael M.; Lee, Yousub; Greeley, Duncan A.; Okello, Alfred; Goin, Michael J.; Pearce, Michael T.; Dehoff, Ryan R.

doi:10.1007/s11837-017-2264-3

Strategy for Texture Management in Metals Additive Manufacturing

Journal Article · Mon Jan 30 23:00:00 EST 2017 · JOM. Journal of the Minerals, Metals & Materials Society

DOI:https://doi.org/10.1007/s11837-017-2264-3· OSTI ID:1361326

Kirka, Michael M. ^[1]; Lee, Yousub ^[1]; Greeley, Duncan A. ^[2]; Okello, Alfred ^[1]; Goin, Michael J. ^[2]; Pearce, Michael T. ^[2]; Dehoff, Ryan R. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility and Materials Science and Technology Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility

Additive manufacturing (AM) technologies have long been recognized for their ability to fabricate complex geometric components directly from models conceptualized through computers, allowing for complicated designs and assemblies to be fabricated at lower costs, with shorter time to market, and improved function. Lacking behind the design complexity aspect is the ability to fully exploit AM processes for control over texture within AM components. Currently, standard heat-fill strategies utilized in AM processes result in largely columnar grain structures. Here, we propose a point heat source fill for the electron beam melting (EBM) process through which the texture in AM materials can be controlled. Using this point heat source strategy, the ability to form either columnar or equiaxed grain structures upon solidification through changes in the process parameters associated with the point heat source fill is demonstrated for the nickel-base superalloy, Inconel 718. Mechanically, the material is demonstrated to exhibit either anisotropic properties for the columnar-grained material fabricated through using the standard raster scan of the EBM process or isotropic properties for the equiaxed material fabricated using the point heat source fill.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility (MDF)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Advanced Manufacturing Office (EE-5A)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1361326

Journal Information:: JOM. Journal of the Minerals, Metals & Materials Society, Journal Name: JOM. Journal of the Minerals, Metals & Materials Society Journal Issue: 3 Vol. 69; ISSN 1047-4838

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Effect of Layer-Wise Varying Parameters on the Microstructure and Soundness of Selective Laser Melted INCONEL 718 Alloy Wang, Xiang; Kang, Jinwu; Wang, Tianjiao Materials, Vol. 12, Issue 13 https://doi.org/10.3390/ma12132165	journal	July 2019
Progress in the Processing and Understanding of Alloy 718 Fabricated Through Powder Bed Additive Manufacturing Processes Kirka, Michael M.; Plotkowski, Alex; Nandwana, Peeyush The Minerals, Metals & Materials Series https://doi.org/10.1007/978-3-319-89480-5_4	book	January 2018
Influence of build layout and orientation on microstructural characteristics of electron beam melted Alloy 718 Karimi, P.; Sadeghi, E.; Deng, D. The International Journal of Advanced Manufacturing Technology, Vol. 99, Issue 9-12 https://doi.org/10.1007/s00170-018-2621-6	journal	September 2018
Asymmetric Cracking in Mar-M247 Alloy Builds During Electron Beam Powder Bed Fusion Additive Manufacturing Lee, Y. S.; Kirka, M. M.; Kim, S. Metallurgical and Materials Transactions A, Vol. 49, Issue 10 https://doi.org/10.1007/s11661-018-4788-8	journal	July 2018
Correlation of Microstructure to Creep Response of Hot Isostatically Pressed and Aged Electron Beam Melted Inconel 718 Shassere, Benjamin; Greeley, Duncan; Okello, Alfred Metallurgical and Materials Transactions A, Vol. 49, Issue 10 https://doi.org/10.1007/s11661-018-4812-z	journal	July 2018
Effect of Different Post-treatments on the Microstructure of EBM-Built Alloy 718 Goel, Sneha; Ahlfors, Magnus; Bahbou, Fouzi Journal of Materials Engineering and Performance, Vol. 28, Issue 2 https://doi.org/10.1007/s11665-018-3712-0	journal	October 2018
Additive manufacturing – a general corrosion perspective Örnek, Cem Corrosion Engineering, Science and Technology, Vol. 53, Issue 7 https://doi.org/10.1080/1478422x.2018.1511327	journal	August 2018
Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source Song, Gian; Lin, Jiao; Bilheux, Jean Journal of Imaging, Vol. 3, Issue 4 https://doi.org/10.3390/jimaging3040065	journal	December 2017

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