Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

434
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
434
Imperfections in Crystal Structure: Point, Line and Plane Defects01:25

Imperfections in Crystal Structure: Point, Line and Plane Defects

47
A perfect crystal, in theory, has a uniform structure with the same unit cell and lattice points throughout. However, any deviation from this periodic arrangement is known as an imperfection or defect. These defects can be categorized into three types: point, line, and plane defects.Point defects occur when there is a deviation from the ideal due to missing atoms, displaced atoms, or additional atoms. These imperfections might occur due to imperfect packing during crystallization or because of...
47
Metallic Solids02:37

Metallic Solids

21.3K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
21.3K
Plastic Behavior01:21

Plastic Behavior

695
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
695
Plastic Deformations01:14

Plastic Deformations

593
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
593
Plastic Deformations01:19

Plastic Deformations

562
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
562

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Noise-induced instability of uniform flow in single-file traffic systems.

PNAS nexus·2026
Same author

Adsorption of C<sub>60</sub> on Al<sub>13</sub>Fe<sub>4</sub>(010): a theoretical study.

Acta crystallographica. Section A, Foundations and advances·2026
Same author

Activation entropy of dislocation glide in body-centered cubic metals from atomistic simulations.

Nature communications·2025
Same author

Van der Waals semiconductor InSe plastifies by martensitic transformation.

Science advances·2024
Same author

Anomalous slip in body-centred cubic metals.

Nature·2022
Same author

Using first-principles calculations to predict the mechanical properties of transmuting tungsten under first wall fusion power-plant conditions.

Journal of physics. Condensed matter : an Institute of Physics journal·2021

Related Experiment Video

Updated: Mar 20, 2026

Determining the Mechanical Strength of Ultra-Fine-Grained Metals
05:04

Determining the Mechanical Strength of Ultra-Fine-Grained Metals

Published on: November 22, 2021

2.7K

Plastic anisotropy and dislocation trajectory in BCC metals.

Lucile Dezerald1,2, David Rodney3, Emmanuel Clouet1

  • 1DEN-Service de Recherches de Métallurgie Physique, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.

Nature Communications
|May 26, 2016
PubMed
Summary

Plasticity in body-centred cubic (BCC) metals shows unusual anisotropic elastic limits due to screw dislocation behavior. A new parameter-free Schmid law, based on dislocation trajectory, accurately predicts this plastic anisotropy.

More Related Videos

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
06:57

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

2.7K
Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

14.5K

Related Experiment Videos

Last Updated: Mar 20, 2026

Determining the Mechanical Strength of Ultra-Fine-Grained Metals
05:04

Determining the Mechanical Strength of Ultra-Fine-Grained Metals

Published on: November 22, 2021

2.7K
Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
06:57

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

2.7K
Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

14.5K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid Mechanics

Background:

  • Body-centred cubic (BCC) metals exhibit atypical low-temperature plasticity.
  • Anisotropic elastic limits in BCC metals violate the standard Schmid law.
  • The underlying physics of screw dislocation behavior causing this anisotropy is not fully understood.

Purpose of the Study:

  • To elucidate the physical mechanisms behind the anisotropic elastic limit in BCC metals.
  • To develop a predictive model for plastic anisotropy without adjustable parameters.
  • To quantify deviations from the Schmid law based on dislocation dynamics.

Main Methods:

  • Analyzing screw dislocation trajectories and their deviations from straight paths.
  • Investigating the asymmetrical and metal-dependent potential energy landscape of dislocations.
  • Developing and applying a modified, parameter-free Schmid law incorporating stress projection on curved trajectories.
  • Comparing model predictions with experimental data and first-principles calculations of dislocation Peierls stress.

Main Results:

  • Deviations from the Schmid law are directly quantifiable by screw dislocation trajectory curvature.
  • The potential energy landscape asymmetry dictates dislocation path deviations.
  • The proposed modified Schmid law accurately predicts experimental and computational results for plastic anisotropy.
  • Dislocation Peierls stress variations with crystal orientation are explained by this new model.

Conclusions:

  • The study provides a fundamental understanding of plastic anisotropy in BCC metals.
  • The modified Schmid law offers a parameter-free approach to predict mechanical behavior.
  • This work bridges the gap between dislocation physics and macroscopic material properties.