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Slip localization behavior at triple junctions in nickel-base superalloys

Journal Article · · Acta Materialia
 [1];  [2];  [2];  [3];  [4];  [4]
  1. Univ. of California, Santa Barbara, CA (United States); OSTI
  2. Univ. of Illinois at Urbana-Champaign, IL (United States)
  3. Cornell Univ., Ithaca, NY (United States)
  4. Univ. of California, Santa Barbara, CA (United States)
Incipient slip localization in the vicinity of hundreds of grain boundary triple junctions (TJs) in a lightly deformed nickel-base superalloy IN718 is studied using a combination of three-dimensional (3D) crystal plasticity finite element (CPFE) modeling, high resolution digital image correlation (HR-DIC) and 3D electron back-scatter diffraction tomography (3D EBSD). A 3D reconstruction method enables identification of thousands of TJs and correspondence of any observed slip bands with their originating TJ lines below the specimen surface. Here, we present a large-scale CPFE model of the experimental 3D microstructure composed of high-fidelity representation of the TJ lines and the boundaries and interiors of the parent grains and use it to calculate the local micromechanical response and slip activity of all TJs at the onset of macroscopic yielding. Statistical analysis of the calculated quantities reveal TJs develop larger stress concentration and grain-average re-orientation than grain interiors and grain boundaries, however no substantial differences in cumulative slip were found among these microstructural regions. We find that TJs with observed slip bands generate lower grain-average re-orientation, fewer active slip systems, and more localized slip on a single system than those without. The distinctions in the reorientation and slip activity are stronger in TJs that experience more intense slip.
Research Organization:
Univ. of California, Santa Barbara, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0018901
OSTI ID:
2420863
Journal Information:
Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 249; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (38)

Microstructural statistics for fatigue crack initiation in polycrystalline nickel-base superalloys journal September 2017
Effects of grain boundary- and triple junction-character on intergranular fatigue crack nucleation in polycrystalline aluminum journal June 2008
In-situ SEM study of temperature-dependent tensile behavior of Inconel 718 superalloy journal July 2021
Self-Assembled Nanoparticle Surface Patterning for Improved Digital Image Correlation in a Scanning Electron Microscope journal March 2013
Deformation Accommodation at Triple Junctions in Columnar-Grained Nickel journal November 2018
Latent hardening in copper and aluminium single crystals journal March 1980
Kinetics of flow and strain-hardening journal November 1981
Material rate dependence and localized deformation in crystalline solids journal December 1983
Crystallographic texture evolution in bulk deformation processing of FCC metals journal January 1992
Triple line energy determination by scanning tunneling microscopy journal January 1991
Modeling slip, kink and shear banding in classical and generalized single crystal plasticity journal May 1998
A combined grain scale elastic–plastic criterion for identification of fatigue crack initiation sites in a twin containing polycrystalline nickel-base superalloy journal January 2016
Fatigue deformation in a polycrystalline nickel base superalloy at intermediate and high temperature: Competing failure modes journal June 2018
Measurements of plastic localization by heaviside-digital image correlation journal September 2018
Intragranular localization induced by softening crystal plasticity: Analysis of slip and kink bands localization modes from high resolution FFT-simulations results journal August 2019
Direct measurements of slip irreversibility in a nickel-based superalloy using high resolution digital image correlation journal March 2020
Slip localization in Inconel 718: A three-dimensional and statistical perspective journal August 2021
Development of grain-scale slip activity and lattice rotation fields in Inconel 718 journal March 2022
A size-dependent tensorial plasticity model for FCC single crystal with irradiation journal February 2015
Strain localization and failure in irradiated zircaloy with crystal plasticity journal August 2015
Effect of neighboring grain orientation on strain localization in slip bands in HCP materials journal September 2021
Grain boundary and triple junction energies in crystalline media: A disclination based approach journal November 2011
The TriBeam system: Femtosecond laser ablation in situ SEM journal February 2015
Accurate reconstruction of EBSD datasets by a multimodal data approach using an evolutionary algorithm journal April 2019
Automated and quantitative analysis of plastic strain localization via multi-modal data recombination journal May 2020
Measurement of elastic and rotation fields during irreversible deformation using Heaviside-digital image correlation journal November 2020
A crystal-plasticity FEM study on effects of simplified grain representation and mesh types on mesoscopic plasticity heterogeneities journal September 2012
Characterisation of strain localisation processes during fatigue crack initiation and early crack propagation by SEM-DIC in an advanced disc alloy journal June 2017
The formation of intragranular stress concentration in plastic deformed Ni-base superalloy: Governing factors and process journal March 2021
Insight into microstructure-sensitive elastic strain concentrations from integrated computational modeling and digital image correlation journal February 2021
Custom Scan Control and Time Resolved Signal Acquisition for High Resolution SEM Imaging journal August 2018
Dominance statistics: Ordinal analyses to answer ordinal questions. journal November 1993
Multi-modal Dataset of a Polycrystalline Metallic Material: 3D Microstructure and Deformation Fields journal August 2022
On the origins of fatigue strength in crystalline metallic materials journal September 2022
DREAM.3D: A Digital Representation Environment for the Analysis of Microstructure in 3D journal April 2014
On a Test of Whether one of Two Random Variables is Stochastically Larger than the Other journal March 1947
The Probable Error of a Mean journal March 1908
Texture Analysis with MTEX – Free and Open Source Software Toolbox journal February 2010