The imaging of failure in structural materials by synchrotron radiation X-ray microtomography

SC Wu, TQ Xiao, PJ Withers - Engineering Fracture Mechanics, 2017 - Elsevier
The initiation and propagation of short cracks are critical to the detailed understanding of the
failure mechanisms of engineering materials and structures. Therefore, for a safety critical …

Direct measurement of critical resolved shear stress of prismatic and basal slip in polycrystalline Ti using high energy X-ray diffraction microscopy

L Wang, Z Zheng, H Phukan, P Kenesei, JS Park… - Acta Materialia, 2017 - Elsevier
Abstract Knowledge of the critical resolved shear stress (CRSS) values of different slip
modes is important for accurately modeling plastic deformation of hexagonal materials …

Multi scale hard x-ray microscopy

HF Poulsen - Current Opinion in Solid State and Materials Science, 2020 - Elsevier
The structure of crystalline materials is typically organised hierarchically on several length
scales. Hard x-ray microscopy is presented as a collection of modalities that allows to zoom …

Grain-resolved analysis of localized deformation in nickel-titanium wire under tensile load

P Sedmák, J Pilch, L Heller, J Kopeček, J Wright… - Science, 2016 - science.org
The stress-induced martensitic transformation in tensioned nickel-titanium shape-memory
alloys proceeds by propagation of macroscopic fronts of localized deformation. We used …

An introduction to three-dimensional X-ray diffraction microscopy

HF Poulsen - Journal of Applied Crystallography, 2012 - journals.iucr.org
Three-dimensional X-ray diffraction microscopy is a fast and nondestructive structural
characterization technique aimed at studies of the individual crystalline elements (grains or …

In situ 3-D observation of early strain localization during failure of thin Al alloy (2198) sheet

TF Morgeneyer, T Taillandier-Thomas, L Helfen… - Acta Materialia, 2014 - Elsevier
High-resolution in situ synchrotron X-ray laminography combined with digital volume
correlation (DVC) is used to measure the damage and plastic strain fields ahead of a notch …

Direct observations and characterization of crack closure during microstructurally small fatigue crack growth via in-situ high-energy X-ray characterization

P Ravi, D Naragani, P Kenesei, JS Park, MD Sangid - Acta Materialia, 2021 - Elsevier
This study provides direct observation of the crack closure mechanism of a naturally
occurring, tortuous, 3D microstructurally small fatigue crack (SFC) in additively manufactured …

Intragranular three-dimensional stress tensor fields in plastically deformed polycrystals

Y Hayashi, D Setoyama, Y Hirose, T Yoshida, H Kimura - Science, 2019 - science.org
The failure of polycrystalline materials used in infrastructure and transportation can be
catastrophic. Multiscale modeling, which requires multiscale measurements of internal …

On the deformation twinning of Mg AZ31B: A three-dimensional synchrotron X-ray diffraction experiment and crystal plasticity finite element model

H Abdolvand, M Majkut, J Oddershede… - International journal of …, 2015 - Elsevier
Crystals with a hexagonal close-packed (HCP) structure are inherently anisotropic, and
have a limited number of independent slip systems, which leads to strong deformation …

GrainSpotter: a fast and robust polycrystalline indexing algorithm

S Schmidt - Journal of Applied Crystallography, 2014 - journals.iucr.org
A new approach for indexing multigrain diffraction data is presented. It is based on the use of
a monochromatic beam simultaneously illuminating all grains. By operating in sub-volumes …