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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Deformation-induced Manipulation of Defect Structures and Hierarchical Microstructures
Presentation Title Deformation Mechanisms in Cu-Nb Nanolayered Composite under Pico-indentation and Tribological Testing
Author(s) Mayur Pole, Zexi Lu, Tanvi Ajantiwalay, Matthew Olszta, Shalini Tripathi, Anqi Yu, Hardeep Mehta, Tianhao Wang, Xiaolong Ma, Arun Devaraj, Bharat Gwalani
On-Site Speaker (Planned) Mayur Pole
Abstract Scope Two-phase nanolayered composites with a high density of semicoherent interfaces exhibit excellent mechanical properties and thermal stability. In this study, magnetron sputtered Cu-Nb nanolayered composite having an amorphous interface between Cu and Nb with highly aligned growth twins in Cu is subjected to severe surface deformation by pico-indentation and high strain cyclic shear loading. The subsurface deformed microstructure reveals multiple deformation mechanisms with grain refinement and crack formations in the highly stressed region of the Nb layer and localized crystallization of the amorphous interface. In addition, detwinning of unstable growth twins in the Cu layer under the cyclic shear strain leaves large dislocations sites and loops which are observed both by high-resolution transmission electron microscopy and experiment guided molecular dynamic simulations.
Proceedings Inclusion? Planned:
Keywords Characterization, Composites, Mechanical Properties

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Novel Warm Rolling Induced Microstructure Modification for Evading Strength-Ductility Trade-off in Medium Manganese Steel
Deformation Induced Hierarchical Twinning in Titanium Alloys
Deformation Mechanisms in Cu-Nb Nanolayered Composite under Pico-indentation and Tribological Testing
Deformation of Fe-Rich, Co-Free Multi-Principal Element Alloys at Multiple Strain Rates and Temperature Conditions
Dynamically Reversible Shear Transformations in a CrMnFeCoNi High-entropy Alloy
Effect of Pre-straining on High Strain Rate Compression Behavior of a Complex Concentrated Alloy Exhibiting Transformation Induced Plasticity
Exploiting Hydrogen Segregation Effects for Controlling Microstructure Evolution
Exploring Joining Mechanism for Immiscible System: Friction Stir Welding of Pure Mg and Pure Fe
Grain Refinement and Microstructural Evolution in AM High Entropy Alloys through SPD and Thermomechanical Processing
Microstructural Inelastic Deformation and Fracture Modes in Crystalline Materials
Nanostructural Hierarchy in Metallic Materials for Extended High Temperature Stability
Phase Stability in Alloys during Severe Plastic Deformation in the High Strain Limit
Processing Heterostructures Using Deformation Techniques
Role of Cold Sprayed Microstructure on Tensile and Fatigue Behavior for AA7075
Self-lubricating Ni-based Superalloy Composites Processed by Severe Plastic Deformation
The Role of Deformation Induced Defects on Phase Evolution in High Entropy Alloys
Under Pressure - Exploring the Synergy of High Pressure Deformation Mechanisms of Metals and Rocks
Universal Trend in the Non-Equilibrium Evolution of Metastable Grain Boundaries at Extreme Conditions

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