Mechanical characterization of an additively manufactured Inconel 718 theta-shaped specimen

Cakmak, Ercan; Watkins, Thomas R.; Bunn, Jeffrey R.; Cornwell, Paris A.; Wang, Yanli; Dehoff, Ryan R.; Babu, Sudarsanam Suresh; Sochalski-Kolbus, Lindsay M.

doi:10.1007/s11661-015-3186-8

Mechanical characterization of an additively manufactured Inconel 718 theta-shaped specimen

Journal Article · Thu Nov 19 23:00:00 EST 2015 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-015-3186-8· OSTI ID:1244186

Cakmak, Ercan ^[1]; Watkins, Thomas R. ^[1]; Bunn, Jeffrey R. ^[1]; Cornwell, Paris A. ^[1]; Wang, Yanli ^[1]; Dehoff, Ryan R. ^[1]; Babu, Sudarsanam Suresh ^[2]; Sochalski-Kolbus, Lindsay M. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Two sets of “theta”-shaped specimens were additively manufactured with Inconel 718 powders using an electron beam melting technique with two distinct scan strategies. Light optical microscopy, mechanical testing coupled with a digital image correlation (DIC) technique, finite element modeling, and neutron diffraction with in situ loading characterizations were conducted. The cross-members of the specimens were the focus. Light optical micrographs revealed that different microstructures were formed with different scan strategies. Ex situ mechanical testing revealed each build to be stable under load until ductility was observed on the cross-members before failure. The elastic moduli were determined by forming a correlation between the elastic tensile stresses determined from FEM, and the elastic strains obtained from DIC. The lattice strains were mapped with neutron diffraction during in situ elastic loading; and a good correlation between the average axial lattice strains on the cross-member and those determined from the DIC analysis was found. Lastly, the spatially resolved stresses in the elastic deformation regime are derived from the lattice strains and increased with applied load, showing a consistent distribution along the cross-member.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: ORNL LDRD Director's R&D

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1244186

Journal Information:: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 2 Vol. 47; ISSN 1073-5623

Publisher:: ASM InternationalCopyright Statement

Country of Publication:: United States

Language:: English

References (28)

Effect of Processing on Microstructure and Physical Properties of Three Nickel-Based Superalloys with Different Hardening Mechanisms Strondl, Annika; Milenkovic, Srdjan; Schneider, André Advanced Engineering Materials, Vol. 14, Issue 7 https://doi.org/10.1002/adem.201100349	journal	April 2012
Interphase microstress measurements in IN 718 by cold neutron diffraction Repper, J.; Link, P.; Hofmann, M. Applied Physics A, Vol. 99, Issue 3 https://doi.org/10.1007/s00339-010-5607-2	journal	March 2010
Studies of Standard Heat Treatment Effects on Microstructure and Mechanical Properties of Laser Net Shape Manufactured INCONEL 718 Qi, H.; Azer, M.; Ritter, A. Metallurgical and Materials Transactions A, Vol. 40, Issue 10 https://doi.org/10.1007/s11661-009-9949-3	journal	August 2009
The Origin of Microstructural Diversity, Texture, and Mechanical Properties in Electron Beam Melted Ti-6Al-4V Al-Bermani, S. S.; Blackmore, M. L.; Zhang, W. Metallurgical and Materials Transactions A, Vol. 41, Issue 13 https://doi.org/10.1007/s11661-010-0397-x	journal	August 2010
Microstructural Architecture, Microstructures, and Mechanical Properties for a Nickel-Base Superalloy Fabricated by Electron Beam Melting Murr, L. E.; Martinez, E.; Gaytan, S. M. Metallurgical and Materials Transactions A, Vol. 42, Issue 11 https://doi.org/10.1007/s11661-011-0748-2	journal	June 2011
Effect of Heat Treatment on Niobium Segregation of Laser-Cladded IN718 Alloy Coating Zhang, Yaocheng; Li, Zhuguo; Nie, Pulin Metallurgical and Materials Transactions A, Vol. 44, Issue 2 https://doi.org/10.1007/s11661-012-1459-z	journal	October 2012
Determination of Bulk Residual Stresses in Electron Beam Additive-Manufactured Aluminum Brice, Craig A.; Hofmeister, William H. Metallurgical and Materials Transactions A, Vol. 44, Issue 11 https://doi.org/10.1007/s11661-013-1847-z	journal	June 2013
Rationalization of Microstructure Heterogeneity in INCONEL 718 Builds Made by the Direct Laser Additive Manufacturing Process Tian, Yuan; McAllister, Donald; Colijn, Hendrik Metallurgical and Materials Transactions A, Vol. 45, Issue 10 https://doi.org/10.1007/s11661-014-2370-6	journal	June 2014
Comparison of Residual Stresses in Inconel 718 Simple Parts Made by Electron Beam Melting and Direct Laser Metal Sintering Sochalski-Kolbus, L. M.; Payzant, E. A.; Cornwell, P. A. Metallurgical and Materials Transactions A, Vol. 46, Issue 3 https://doi.org/10.1007/s11661-014-2722-2	journal	January 2015
Mechanical Properties of INCONEL 718 Parts Manufactured by Shaped Metal Deposition (SMD) Baufeld, Bernd Journal of Materials Engineering and Performance, Vol. 21, Issue 7 https://doi.org/10.1007/s11665-011-0009-y	journal	August 2011
Metal Additive Manufacturing: A Review Frazier, William E. Journal of Materials Engineering and Performance, Vol. 23, Issue 6 https://doi.org/10.1007/s11665-014-0958-z	journal	April 2014
Metal Fabrication by Additive Manufacturing Using Laser and Electron Beam Melting Technologies Murr, Lawrence E.; Gaytan, Sara M.; Ramirez, Diana A. Journal of Materials Science & Technology, Vol. 28, Issue 1 https://doi.org/10.1016/S1005-0302(12)60016-4	journal	January 2012
Characterization of interfacial microstructures in 3003 aluminum alloy blocks fabricated by ultrasonic additive manufacturing Dehoff, R. R.; Babu, S. S. Acta Materialia, Vol. 58, Issue 13 https://doi.org/10.1016/j.actamat.2010.03.006	journal	August 2010
Microstructures and mechanical behavior of Inconel 718 fabricated by selective laser melting Amato, K. N.; Gaytan, S. M.; Murr, L. E. Acta Materialia, Vol. 60, Issue 5 https://doi.org/10.1016/j.actamat.2011.12.032	journal	March 2012
The mechanical and microstructural characteristics of laser-deposited IN718 Blackwell, P. L. Journal of Materials Processing Technology, Vol. 170, Issue 1-2 https://doi.org/10.1016/j.jmatprotec.2005.05.005	journal	December 2005
Microstructures and mechanical properties of electron beam-rapid manufactured Ti–6Al–4V biomedical prototypes compared to wrought Ti–6Al–4V Murr, L. E.; Esquivel, E. V.; Quinones, S. A. Materials Characterization, Vol. 60, Issue 2 https://doi.org/10.1016/j.matchar.2008.07.006	journal	February 2009
Residual stresses in LENS® components using neutron diffraction and contour method Rangaswamy, P.; Griffith, M. L.; Prime, M. B. Materials Science and Engineering: A, Vol. 399, Issue 1-2 https://doi.org/10.1016/j.msea.2005.02.019	journal	June 2005
Investigations of MX and γ′/γ″ precipitates in the nickel-based superalloy 718 produced by electron beam melting Strondl, A.; Fischer, R.; Frommeyer, G. Materials Science and Engineering: A, Vol. 480, Issue 1-2 https://doi.org/10.1016/j.msea.2007.07.012	journal	May 2008
Gamma double prime precipitation kinetic in Alloy 718 Devaux, A.; Nazé, L.; Molins, R. Materials Science and Engineering: A, Vol. 486, Issue 1-2 https://doi.org/10.1016/j.msea.2007.08.046	journal	July 2008
Microstructural and mechanical approaches of the selective laser melting process applied to a nickel-base superalloy Vilaro, T.; Colin, C.; Bartout, J. D. Materials Science and Engineering: A, Vol. 534 https://doi.org/10.1016/j.msea.2011.11.092	journal	February 2012
NRSF2 load frame: design, control, and testing An, Ke; Bailey, William; Craig, Stewart Journal of Neutron Research, Vol. 15, Issue 3 https://doi.org/10.1080/10238160802399779	journal	June 2007
Characterization of H13 steel produced via electron beam melting Cormier, Denis; Harrysson, Ola; West, Harvey Rapid Prototyping Journal, Vol. 10, Issue 1 https://doi.org/10.1108/13552540410512516	journal	February 2004
TetGen, a Delaunay-Based Quality Tetrahedral Mesh Generator Si, Hang ACM Transactions on Mathematical Software, Vol. 41, Issue 2 https://doi.org/10.1145/2629697	journal	February 2015
Microstructure and mechanical properties of nickel based superalloy IN718 produced by rapid prototyping with electron beam melting (EBM) Strondl, A.; Palm, M.; Gnauk, J. Materials Science and Technology, Vol. 27, Issue 5 https://doi.org/10.1179/026708309X12468927349451	journal	May 2011
Advanced metal powder based manufacturing of complex components by electron beam melting Gaytan, S. M.; Murr, L. E.; Medina, F. Materials Technology, Vol. 24, Issue 3 https://doi.org/10.1179/106678509X12475882446133	journal	September 2009
Site specific control of crystallographic grain orientation through electron beam additive manufacturing Dehoff, R. R.; Kirka, M. M.; Sames, W. J. Materials Science and Technology, Vol. 31, Issue 8 https://doi.org/10.1179/1743284714Y.0000000734	journal	November 2014
Introduction to the Characterization of Residual Stress by Neutron Diffraction Hutchings, M. T.; Withers, P. J.; Holden, T. M. https://doi.org/10.1201/9780203402818	book	January 2005
Thermal effects on microstructural heterogeneity of Inconel 718 materials fabricated by electron beam melting Sames, William J.; Unocic, Kinga A.; Dehoff, Ryan R. Journal of Materials Research, Vol. 29, Issue 17 https://doi.org/10.1557/jmr.2014.140	journal	July 2014

Cited By (1)

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

Similar Records

Microstructural and micromechanical characterization of IN718 theta shaped specimens built with electron beam melting

Journal Article · Mon Feb 22 23:00:00 EST 2016 · Acta Materialia · OSTI ID:1240549

Mean stress effects in biaxial fatigue of Inconel 718

Journal Article · Sun Jul 01 00:00:00 EDT 1984 · J. Eng. Mater. Technol.; (United States) · OSTI ID:6346582

Related Subjects

36 MATERIALS SCIENCE

Mechanical characterization of an additively manufactured Inconel 718 theta-shaped specimen

Citation Formats

References (28)

Cited By (1)

Similar Records

Related Subjects