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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
Presentation Title Harnessing Non Equilibrium Processing in Additive Manufacturing
Author(s) Kathryn Small, Markus Suddmans, Anna K. Rawlings, Ian McCue, Jaafar A. El-Awady, Mitra L. Taheri
On-Site Speaker (Planned) Anna K. Rawlings
Abstract Scope Laser-powder bed fusion (L-PBF) is an additive manufacturing (AM) technique that has gained popularity in recent years due to its potential for fast, low-waste manufacturing of complex components with narrow geometric tolerances. Its rapid solidification and fast cooling rates lead to microstructures that contain high residual stresses, anisotropic grain morphologies, intragranular misorientations, and unique, metastable dislocation cell structures. In addition to dislocation cell structures and residual stress variations, the grain and dendrite morphology in AM metals can differ based on the location within the build, owing to differences in number of remelting cycles and relative time at elevated temperature. This talk presents 1D geometries (e.g., single line traces) and 3D builds (e.g., cylinders) that show the impact of thermal environment and solidification pathway on the resulting microstructure. We reveal an increased microscale elastic strain level resulting from higher temperature gradients and faster cooling rates as well as a higher spatial correlation between elastic strain and dislocation density. These features have a direct impact on harnessing non-equilibrium structures.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Nanomechanical Approach to Reveal the Origins of Superior Intergranular Cracking Resistance in Irradiated Additively-manufactured Stainless Steel
Bridging the Deformation Length-scales in Additively Manufactured Metals via In Situ Mechanical Testing
Capturing the Effects of Grain Boundaries and Intersplat Boundaries on Deformation Behavior of Cold Sprayed Components
Correlating the Microstructure and Mechanical Properties of Additively Manufactured Al-Ce Alloys Using In-situ Micromechanical Testing
Deciphering the Fundamental Cause of Shape Distortion in Sintering-based Additive and Non-additive Manufacturing Processes
Deformation and Microstructure Development in DED-AM Structures via Dark Field X-ray Microscopy and In Situ Imaging
Designing Additive Layered Manufacturing Inspired Damage Tolerant Architectures
Effect of LPBF Parameters on Post Heat Treatment Microstructure and Sub-sized Tensile Properties of LPBF Inconel 718
Effect of Skin Microstructure on the Bending Properties of Additively Manufactured IN625 Beams
Hardening Rate Dependent Deformation Behavior of Additively Manufactured Inconel 718 during Nano-scratch
Harnessing Non Equilibrium Processing in Additive Manufacturing
High-throughput Synthesis and Testing of Novel Alloys for Additive Manufacturing
Indentation-derived Mechanical Properties of Ti-6Al-2Sn-4Zr-2Mo Alloy Fabricated through Laser-powder Bed Fusion
Intentional and Unintentional Spatial Variation in Laser Powder Bed Fusion
Investigating the Influence of Scan Strategy and Small-scale Geometrical Complexity on the Microstructure and Mechanical Properties of Thin Wall SLM IN718
Investigations of Toughening Mechanisms in Nanoarchitected Polymers
J-39: Crack-free Three-dimensional Electrical Interconnects 3D Printed on Soft PDMS Substrates
J-41: Effects of Processing Parameters on Residual Stresses in Commercially Pure Ti
J-42: Investigating Microstructural Features of 304L Stainless Steel Friction-stir Weld with Indentation Methods
J-43: Microstructure Characterization of As-sprayed and Post-processed Cold-spray Materials
J-44: Probing the Mechanism of Healing Micropores in Additive Manufacturing Al-Li Alloys Using High Resolution X-ray Computed Tomography
J-45: The Effect of Extrusion and Aging on the Mechanical Properties of Additively Manufactured AlSi10Mg
Laser Scan Length: A New Parameter to Tune the Thermal Buildup in Laser Powder Bed Fusion Processes
Mechanical Microscopy of Additively-manufactured Steels Using High-speed Nanoindentation
Mechanical Properties of Single Struts Made by Laser Powder-bed Fusion: Effects of Melt-track Transient States and Process Parameters
Mechanical Properties of Tantalum Cold Sprayed Deposits: Insight Into the Interstitial Hydrogen Content and Powder Size Distribution Effects
Mechanical Response of “Meta-Polycrystalline” Steel 316L Produced by Laser Powder Bed Fusion
Micromechanical Study of Microstructurally Heterogenous and Hierarchical Additive Manufactured Material Using High-resolution Nanoindentation Mapping
Microstructure and Mechanics of Hydrogel Enabled Additively Manufactured Metals and Metal Alloys
Multi-scale Dynamic Strain Measurement and Machine Learning Optimization to Uncover Solidification Dynamics of Ti-5553 L-PBF Melt Pools
NOW ON-DEMAND ONLY - Effect of Cr Addition on the Microstructure and Mechanical Properties of Additively Manufactured GRCop-84
NOW ON-DEMAND ONLY – Multi Length-scale In-situ Monitoring of AM Processes: Towards Prediction of Local Defects and Properties
On the Influence of the Representative Volume Elements Size on Predicting Dislocation Microstructure Evolution in Laser Additive Manufacturing Metals
Plastic Strain Visualization and Analysis of Laser Processed Nickel Single Crystals and Polycrystalline 316L
Probing Heterogenous Mechanical Properties in AM Materials Due to Melt Pool Boundaries
Quasi-static Mechanical Properties of As-printed Thin Wall Inconel 718 Manufactured with Laser Powder Bed Fusion: Effects of Thickness and Hot Isostatic Pressing
Strategies for Functional Grading Using Additive Manufacturing
Temperature-dependent Evolution of Dislocation Microstructure and Mechanical Properties of SLM-316L Stainless Steel
The Effect of Defects on Additive Manufacturing Material at the Microscale -- Approaches to Manage the Consequences
The Effect of Microstructural Features on the Mechanical Properties of Additively Manufactured Metals and Alloys
Three-pronged Approach to Prediction of Polymer-additive System Rheology
Understanding the Influence of Microstructure and Voids during Induced Spall Failure of Additive Manufactured Stainless Steel
What Can We Learn from Micromechanical Testing: A Case Study for EBM-produced Ti-6Al-4V

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