Results 11 to 20 of about 2,467 (201)

Strain Field Around Individual Dislocations Controls Failure. [PDF]

Small Methods
By conducting in situ transmission electron microscopy strain mapping during a nanoscale fracture experiment, the dislocation processes taking place at the crack tip in the rather brittle metal chromium is detailed. Moreover, for the first time, the local stress fields of the dislocations shielding the crack is directly measured. Abstract Understanding
Gammer C, Issa I, Minor AM, Ritchie RO, Kiener D.   +4 more
europepmc   +2 more sources

On the relationship between J-integral and CTOD for CT and SENB specimens

Fracture and Structural Integrity, 2013
In this investigation the relationship between J-integral and CTOD is studied considering a Compact Tensile (CT) and Single edge notched bend (SENB) specimens using finite element analysis.
S. K. Kudari, K.G. Kodancha
doaj   +3 more sources

Three-dimensional numerical study of thickness effect on plastic CTOD and monotonic plastic zone in an aluminium CT specimen

Theoretical and Applied Fracture Mechanics, 2023
This work is a numerical study of CT specimens with straight cracks and different thickness values submitted to different load levels, which aims to analyse the shape and dimension variations of the monotonic yielded area near the crack tip, examining the impact of variables such as load magnitude, thickness of the specimen and position along the crack
D. Camas, R. Branco, F.V. Antunes, D.M. Neto   +3 more
openaire   +4 more sources

Study of cyclic crack‐tip opening displacement of microstructurally small fatigue crack using digital image correlation

Fatigue &Fracture of Engineering Materials &Structures, Volume 46, Issue 11, Page 4103-4118, November 2023., 2023
Abstract The current work investigates the relationship between the crack growth rate (CGR) and the cyclic crack‐tip opening displacement (ΔCTOD) of microstructurally small fatigue cracks by using high‐resolution digital image correlation (DIC). Load‐controlled fatigue tests were conducted on small‐scale specimens of 18%Cr body‐centered cubic ferritic ...
Ilari Tillikainen, Pasquale Gallo, Pauli Lehto, Heikki Remes   +3 more
wiley   +1 more source

Fatigue fracture surface analysis in C45 steel specimens using X-Ray fractography [PDF]

, 1991
X-Ray fractography is a useful technique to analyse the mechanisms operating in fracture and involves an examination of the fracture surface. In the present investigation, this technique has been employed to study the fatigue fracture behaviour of a ...
Kolster, B.H., Pathiraj, B., Rajanna, K.
core   +6 more sources

Experimental characterisation of fatigue crack growth based on the CTOD measured from crack tip displacement fields using DIC

Fracture and Structural Integrity, 2019
The current work presents an experimental study on the use of the crack tip opening displacement (CTOD) to evaluate its ability to characterise fatigue crack growth.
J.M. Vasco-Olmo, F.A. D�az, F.V. Antunes, M.N. James   +3 more
doaj   +3 more sources

The behavior of anisotropic fatigue short crack initiation and propagation for a directionally solidified superalloy CM247LC at room temperature

Fatigue &Fracture of Engineering Materials &Structures, Volume 46, Issue 10, Page 3912-3926, October 2023., 2023
Abstract The effects of mechanical and microstructural anisotropy on short fatigue crack initiation and propagation behaviors of a directionally solidified superalloy have been studied. An unusual result was found where the fatigue lives of specimens with grains longitudinally aligned along the loading direction fail at lower lifetimes than specimens ...
Yuanguo Tan, Sari Octaviani, Nong Gao, Philippa A. S. Reed   +3 more
wiley   +1 more source

Plastic CTOD as fatigue crack growth characterising parameter in 2024‐T3 and 7050‐T6 aluminium alloys using DIC [PDF]

Fatigue & Fracture of Engineering Materials & Structures, 2020
AbstractThe plastic range of crack tip opening displacement (CTOD) has been used for the experimental characterisation of fatigue crack growth for 2024‐T3 and 7050‐T6 aluminium alloys using digital image correlation (DIC). Analysis of a complete loading cycle allowed resolving the CTOD into elastic and plastic components.
José Manuel Vasco‐Olmo, Francisco Alberto Díaz Garrido, Fernando Ventura Antunes, M.N. James   +3 more
openaire   +3 more sources

Dislocation toughening in single‐crystal KNbO3

Journal of the American Ceramic Society, Volume 106, Issue 7, Page 4371-4381, July 2023., 2023
Abstract The growing research interest in dislocation‐tuned functionality in ceramics is evident, with the most recent proofs‐of‐concept for enhanced ferroelectric properties, electrical conductivity, and superconductivity via dislocations. In this work, we focus on dislocation‐tuned mechanical properties and demonstrate that, by engineering high ...
Oliver Preuß, Enrico Bruder, Wenjun Lu, Fangping Zhuo, Christian Minnert, Jiawen Zhang, Jürgen Rödel, Xufei Fang   +7 more
wiley   +1 more source

An in-depth investigation into the implications of alleviating banded microstructures on crack-tip opening displacement test of API 5LX60 linepipe steel plate

Journal of Materials Research and Technology, 2023
The present study seeks to fill the research gap regarding the correlation between crack-tip opening displacement (CTOD) and banded microstructures of high-strength low-alloy steel.
N. Amirjani, N. Barka, M. Eskandari, M. Hizombor   +3 more
doaj   +1 more source