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Meeting 2015 TMS Annual Meeting & Exhibition
Symposium Development of "Weak Links" during the Processing of Metallic Materials
Sponsorship TMS Materials Processing and Manufacturing Division
TMS: Shaping and Forming Committee
Organizer(s) Lee Semiatin, US Air Force Research Laboratory
Anthony Rollett, Carnegie Mellon University
Thomas R. Bieler, Michigan State University
Mark R. Stoudt, National Institute of Standards and Technology
Scope This symposium is being held in recognition of the numerous fundamental and technological contributions that Professor Henry R Piehler (and his students) have made in the field of deformation processing and its effect on in-service properties. Specifically, the mechanical behavior and service life of metallic components is usually controlled not by so-called "typical" microstructural features, but rather by abnormal features, which represent weak links in the material. Abnormal features may include internal cavities, un-recrystallized areas, bands of non-uniform texture/micro-texture, abnormally large grains, etc. From a statistical point of view, such problems are related to the tails of distributions and extreme values. The objective of this symposium, therefore, is to highlight current knowledge about the source of such defects from both a fundamental research perspective as well as industrial experience in the aerospace, automotive, appliance, and other industries.

Topics of specific interest include, but are not limited to, the following: a) evolution of defects associated with non-uniform/incomplete recovery, recrystallization, and/or grain growth, b) evolution of defects associated with non-uniform crystallographic texture, c) evolution of defects associated with non-uniform mechanical texture, d) evolution of defects associated with irregular macroscopic or microscopic metal flow during processing (e.g., shear bands, cavitation, micro-cracks, damage, etc.) e) modeling of defect evolution during processing, f) quantification of the distributions of microstructural elements relevant to performance and failure, g) case histories of defect evolution at the laboratory and industrial scales, and h) application of fundamental knowledge to reduce/eliminate defects in industrial processes.
Abstracts Due 07/15/2014
Proceedings Plan Planned: A print-only volume
PRESENTATIONS APPROVED FOR THIS SYMPOSIUM INCLUDE

A Study on Forming Limit Diagram Using a Self-Consistent Crystal Plasticity Model
Abnormal Grain Growth during Supersolvus Heat Treatment of PM Superalloys
Accounting for Abnormal Features in Representative Descriptions of Microstructure
Analysis of the Subsurface Slip Activity during Plastic Deformation Using Crystal Plasticity Finite Element Method with Realistic 3D Microstructure
Cavitation during the Hot Working of Alpha/Beta Titanium Alloys Cavitation during the Hot Working of Alpha/Beta Titanium Alloys
Defects and Microstructural Inhomogeneity in Friction Stir Welding and Processing
Defects Developed during Superplastic Forming and Diffusion Bonding of Titanium Components
Developing Statistical Descriptions of Defect-Mediated Structure-Properties Relationships in Metals
Dynamic Damage Evolution at Interfaces in Cu and Its Alloys
Dynamic Recrystallization and Physical Simulation of High Frequency Welding
EBSD versus HEDM Characterization of Orientation Gradients during Plastic Deformation
Effect of Grain Size and Grain Boundary Microstructure on Fatigue Crack Nucleation in FCC Polycrystalline Materials
Effect of Microstructure Nonuniformity on Hot Rolling of TiAl Foil
Effect of Zr Addition on Recrystallization Behavior in Rolled Ti-Zr Alloys
Effects of Clustered Nucleation in Partially Recrystallized Samples on Ductility
Evolution of Excess Dislocation Density at Grain Boundaries during Deformation of Polycrystalline Metals
Evolution of Microstructural Heterogeneities during Solid-State Joining of Structural Metals
Finding the Weakest Link within the Hierarchy of Microstructure in Titanium Alloys
Grain Size Distribution Evolution during Thermomechanical Processing of Powder Metallurgical Superalloys
Interpretations of Microstructure and Defect Formation during Solid-State Welding of Titanium Alloys
Limiting Features in Wrought Aerospace Alloys
Material Characteristics and Defects Found in Metal Injection Molded (MIM) Materials via Metallographic Cross-Sectioning
Microstructure and Phase Changes during Cold Rolling and Folding of Metallic Multilayers
Modeling of Ductile Fracture for Cold Working Processes
Overcoming Challenges in Damage Engineering: Design of Reliable Damage Quantification Methodologies and Damage-Resistant Microstructures
Prevention of Coarse Microstructure Features during Conversion of Ingot Metallurgy Nickel- and Titanium-Based Alloys
Quantifying Microstructural Defects in Materials: Theory and Experiment
Recent Advances in Process and Material Modeling Applications
Strain Localization in Plastically Anisotropic Metallic Nanolaminates
The Potential Role for Impulse and High Velocity in Manufacturing
Thermal Stability of FeZr Nanocomposites Containing Nanolaminates
When the Infrequent Dominate Microstructure in Hot Forming
(Mesoscale) Driving Forces for Crack Turning in Hard Aluminum Alloys


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