1 / 8

The missing link between connecting microstructure to mechanical properties: Going beyond Orowan

Explore the missing link between microstructure and mechanical properties, including existing dislocations, inclusions, particles, and point defects. Examine tensile strength, fracture, creep, fatigue, voids/bubbles, grains and grain boundaries, deformation, and dislocation-related phenomena. Discuss the limitations, such as temperature, anisotropy, climb, cross-slip, material heterogeneity, and particle coherency/cutting. Highlight various modelling methods, including atomistic, discrete dislocation dynamics, and continuum mechanical models. Emphasize the importance of combining experimental data with modeling approaches in understanding microstructure-property relationships.

georgewright
Download Presentation

The missing link between connecting microstructure to mechanical properties: Going beyond Orowan

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The missing link between connecting microstructure to mechanical properties: Going beyond Orowan

  2. Mechanical Properties Microstructure Existing dislocations Inclusions, particles and point-defects Tensile strength Fracture Creep Fatigue Voids/bubbles Grains & GBs Deformation GB sliding Dislocations

  3. Mechanical Properties Microstructure Existing dislocations Inclusions, particles and point-defects Inclusions, particles and point-defects Tensile strength Fracture Creep Fatigue Voids/bubbles Grains & GBs Deformation GB sliding Dislocations

  4. Limitations • Temperature? • Anisotropy? • Climb? • Cross-slip? • Material heterogeneity • Particle coherency/cutting

  5. Modelling Dislocations • Atomistic • more precise, but slow • Discrete dislocation dynamics • faster, but only approximates the physics

  6. Any thing else? • Difficulty in measuring grain sizes etc. • Limits of small scale characterization • Temperature – mechanistic differences • Parameterized models – do they hide the details? • Creep testing and mechanisms different at different stress levels (even at the same T). Difference with accelerated tests. • Long term effects: accu. Damage, phase change, transmutation • Not just modelling or experiments – but both! • Small scale testing and its difficulties. • Weld porosity • Deconvoluting deformation mechanisms, how to combine the factors

  7. Modelling Methods • Discrete dislocation dynamics • Phase-field (phase sep.) • Continuum mechanical models, FEM elements

More Related