skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of anisotropy and texture on the low cycle fatigue behavior of Inconel 718 processed via electron beam melting

Journal Article · · International Journal of Fatigue
 [1];  [2];  [3];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division

Here in this study, the impact of texture (columnar/equiax grain structure) and influence of material orientation on the low cycle fatigue (LCF) behavior of hot isostatic pressed (HIP) and heat-treated Inconel 718 fabricated through electron beam melting (EBM) is investigated. Material was tested both parallel and perpendicular (transverse) to the build direction. In all instances, the EBM HIP and heat-treated Inconel 718 performed similarly or exceeded the LCF life of wrought Inconel 718 plate and bar stock under fully reversed strain-controlled loading at 650 °C. Amongst the textures, the columnar grains oriented parallel to the build direction exhibited the highest life on average compared to the transverse columnar and equiax EBM material. Further, in relation to the reference wrought material the parallel columnar grain material exhibited a greater life. While a negligible life difference was observed in the equiax grained material between the two orientations, a consistently lower accumulated inelastic strain was measured for the material loaded parallel to the build direction than the transverse orientation. Failure of the parallel columnar material occurred in a transgranular manner with cracks emanating from the surface whereas the transverse columnar material failed in a intergranular manner, with crack growth occurring through repeated rupture of oxide at the crack-tip. Finally, in the case of the equiax material, an influence of material orientation was not observed on the failure mechanism with crack propagation occurring through a combination of debonded/cracked carbides and void formation along twin boundaries resulting in a mixture of intergranular and transgranular crack propagation.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1423081
Alternate ID(s):
OSTI ID: 1495616
Journal Information:
International Journal of Fatigue, Vol. 105; ISSN 0142-1123
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 76 works
Citation information provided by
Web of Science

References (21)

Lower temperature deformation mechanisms in a γ″-strengthened Ni-base superalloy journal April 2016
Effect of standard heat treatment on the microstructure and mechanical properties of hot isostatically pressed superalloy inconel 718 journal August 2003
Effect of heat treatment on the microstructure and mechanical properties of Inconel 718 processed by selective laser melting journal July 2015
Effect of standard heat treatment on the microstructure and mechanical properties of selective laser melting manufactured Inconel 718 superalloy journal September 2015
Mechanical and Microstructural Investigation of Nickel-Based Superalloy IN718 Manufactured by Selective Laser Melting (SLM): Mechanical and Microstructural Investigation … journal June 2015
Microstructure and mechanical properties of nickel based superalloy IN718 produced by rapid prototyping with electron beam melting (EBM) journal May 2011
Effects of build direction and heat treatment on creep properties of Ni-base superalloy built up by additive manufacturing journal March 2017
Microstructure, Fatigue Behavior, and Failure Mechanisms of Direct Laser-Deposited Inconel 718 journal December 2016
Low cycle fatigue behavior of direct metal laser sintered Inconel alloy 718 journal December 2016
The influence of Laves phases on the high-cycle fatigue behavior of laser additive manufactured Inconel 718 journal May 2017
Microstructure Development in Electron Beam-Melted Inconel 718 and Associated Tensile Properties journal February 2016
Effect of solidification parameters on the growth geometry of MC carbide in IN- 100 dendritic monocrystals journal October 1978
Strategy for Texture Management in Metals Additive Manufacturing journal January 2017
Strain Fatigue and Tensile Behavior of Inconel® 718 from Room Temperature to 650°C journal January 1974
Development of a Damage Tolerant Microstructure for Inconel 718 Turbine Disk Material conference January 1988
Stress-Strain Behavior of Inconel 718 During Low Cycle Fatigue journal July 1982
Intergranular crack tip oxidation mechanism in a nickel-based superalloy journal June 1992
The effect of microstructure and environment on the crack growth behaviour of Inconel 718 alloy at 650 °C under fatigue, creep and combined loading journal November 1982
Low cycle fatigue behavior of inconel 718 at 298 K and 823 K journal July 1977
Prediction of Fatigue-Initiating Twin Boundaries in Polycrystalline Nickel Superalloys Informed by TriBeam Tomography journal July 2016
Fatigue crack initiation, slip localization and twin boundaries in a nickel-based superalloy journal August 2014

Cited By (11)

Effect of miniaturization and surface roughness on the mechanical properties of the electron beam melted superalloy Inconel®718 journal October 2019
Notched fatigue testing of Inconel 718 prepared by selective laser melting journal July 2018
Can Appropriate Thermal Post-Treatment Make Defect Content in as-Built Electron Beam Additively Manufactured Alloy 718 Irrelevant? journal January 2020
High cycle fatigue life estimation of materials processed by laser powder bed fusion journal February 2019
Determination of Anisotropic Mechanical Properties for Materials Processed by Laser Powder Bed Fusion journal November 2018
Effect of Different Post-treatments on the Microstructure of EBM-Built Alloy 718 journal October 2018
Effect of Compositional Variation Induced by EBM Processing on Deformation Behavior and Phase Stability of Austenitic Cr-Mn-Ni TRIP Steel journal January 2020
Effect of Build Orientation on Mechanical Properties and Microstructure of Ti-6Al-4V Manufactured by Selective Laser Melting journal June 2019
The Effect of Location and Post-treatment on the Microstructure of EBM-Built Alloy 718 book January 2018
Effect of Compositional Variation Induced by EBM Processing on Deformation Behavior and Phase Stability of Austenitic Cr-Mn-Ni TRIP Steel text January 2020
Additive Manufacturing of Alloy 718 via Electron Beam Melting: Effect of Post-Treatment on the Microstructure and the Mechanical Properties journal December 2018

Similar Records

Correlation of Microstructure to Creep Response of Hot Isostatically Pressed and Aged Electron Beam Melted Inconel 718
Journal Article · Mon Jul 16 00:00:00 EDT 2018 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science · OSTI ID:1423081

Mechanical behavior of post-processed Inconel 718 manufactured through the electron beam melting process
Journal Article · Fri Oct 21 00:00:00 EDT 2016 · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing · OSTI ID:1423081

Crystallographic texture engineering through novel melt strategies via electron beam melting: Inconel 718
Journal Article · Mon Jun 01 00:00:00 EDT 2015 · Materials Science and Technology · OSTI ID:1423081