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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
Presentation Title Measuring the Multiaxial Nature of Thermomechanical Constitutive Relationships of Crystalline Materials
Author(s) Garrison M. Hommer, Ashley N. Bucsek, Harshad Paranjape, Zachary Brunson, Jinesh Dahal, Aaron Stebner
On-Site Speaker (Planned) Aaron Stebner
Abstract Scope Researchers have been challenged for nearly a century to directly measure the multiaxial nature of the thermomechanical constitutive relationships of crystalline materials. Recently, a new planar-biaxial experimental platform has been developed to meet these challenges. Coupling with far-field high-energy diffraction microscopy enables the direct assessment of elastic vs. inelastic deformation of the gauge sections of cruciform specimens subjected to plane stress loadings, without any a priori assumptions of the form of constitutive relationships. Results using this platform to answer two long-standing mechanics questions will be presented: 1) Why does dwell fatigue of alpha-titanium subjected to multiaxial loads not follow our best constitutive relationships derived from uniaxial tests? and 2) What is the mechanistic origin of path-dependence in superelastic nickel-titanium? Concluding remarks will be given to show the connections between the experimental data and multiple micromechanical and continuum modeling frameworks.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A New Yield Criterion Accounting for Anisotropy and Anisotropic Asymmetry from Near Isotropy to Triclincity
An Investigation into Improved Elongation-to-fracture in AHSS via Continuous Bending Under Tension
Damage Detection of Sheet Metal via Multi-directional Deformation
Development of a Lean Duplex TRIP Steel with a Superior Formability
Effects of Y Concentration on Mechanical Response of Mg-Y Alloys
Evolution of Local Formability Concepts for Advanced High Strength Steels (AHSS)
Experimental Studies into the Role of Cyclic Bending during Stretching of Dual-phase Steel Sheets
Formability of Textured Anisotropic Uranium Plate
High Precision Material Modeling of 5000 Series Aluminum Alloy Sheet Using Biaxial Tensile Tests and Hole Expansion Simulation
In-situ Neutron Diffraction of Strain Path Change Effects in Cold-rolled MgAZ31B Sheet
Industry Perspective on the Mechanical Characterization of Next Generation Steels
K-137 (Invited): Understanding Room Temperature Softening Behavior in AA5182
Large-strain Cruciform Testing for Characterization of Macro- and Micro-scale Formability of Sheet Metals
Material Modeling in Biaxial Stress Field and Hole Expansion Simulation of Hot-rolled Steel Sheets
Measuring the Multiaxial Nature of Thermomechanical Constitutive Relationships of Crystalline Materials
Microstructural Response of Stainless Steel Subjected to Biaxial Load Path Changes: In-situ Neutron Diffraction and Multi-scale Modeling
Microstructure Control for Enhanced Multi-step Formability
Modeling Anisotropic Plasticity Under Complex Loading Conditions: Effects of Loading Path Changes on Flow Stress, Springback and Formability of Sheet Metals
Modeling of Hole-expansion of Prestrained Sheets Using Distortional Hardening
Multi-directional Deformation Capabilities in the NIST Center for Automotive Lightweighting (NCAL)
Multiscale Modeling of Self-piercing Riveting Process
Production of Commercially Pure Aluminum Strips via a Single-Step, Machining-based Technique
Strain Localization and Damage in a α+β Titanium Alloy: A Study of Microstructure Heterogeneity and Strain Path Effects

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