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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
Presentation Title In Situ Characterization of Defects Formation and Microstructure Evolution in Selective Laser Melting of Metals
Author(s) Lianyi Chen
On-Site Speaker (Planned) Lianyi Chen
Abstract Scope The quality of the parts manufactured by selective laser melting (SLM) is determined by the defects and microstructure characteristics formed during processing. Understanding how defects form and how microstructure evolves during laser melting and solidification is critical for eliminating defects and obtaining desired microstructures in the as-built parts produced by SLM. Unfortunately, the highly localized and very short interaction of laser beam with metal powders during SLM prevents the direct observation of this process by conventional characterization tools. The details of the defects formation and microstructure evolution during SLM are still unknown. Here we report the characterization of the formation and evolution of defects and microstructures during selective laser melting of metals by high speed x-ray imaging and diffraction. The results obtained in this work are critical for establishing the processing-microstructure relationships in SLM of metals.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


A-11: Cold Gas Dynamic Spray Deposition for Additive Repair of AA7075 and AA2024 Structures
A-12: Additive Manufacturing of High Performance NdFeB Bonded Permanent Magnets
A-14: Development of Diffusion Mobility Descriptions for Additive Manufactured Ti-6Al-4V
A-16: Effect of Build Orientation on the Microstructure and Mechanical Properties of Selective Laser Melted Ti-6Al-4V Alloys
A-18: Effect of Microstructure on the High-temperature Oxidation Behavior of Inconel 718 Manufactured via Electron Beam Melting
A-19: Effect of Print Parameters on Microstructure of EBM Printed Ti-6Al-4V
A-1: A Study of Multiple Interfaces in Stainless Steel 316L Components Fabricated by Laser Powder Injection Deposition
A-20: Effects of Recycled Powder on Build Integrity in Metal Based Additive Manufacturing
A-21: Electron Microscopy Study of Non-metallic Inclusions in Additively Manufactured 17-4PH Stainless Steel Parts
A-22: Fatigue and Fracture in Additive Manufacturing Metals: Findings from a Recent NIST/ASTM Workshop
A-23: Finite Element Analysis of Hybrid Additive Manufacturing to Print Location Specific Mechanical Properties by Sequential Laser Shock Peening
A-24: Grain Growth and Heat Flux Direction during Selective Laser Melting of CoCrMo Alloy
A-25: High-strength, Corrosion-resistant, Weldable Aluminum Powders for Additive Manufacturing
A-27: In Operando Synchrotron X-ray Imaging of Selective Laser Melting
A-28: Incorporating Complex Thermal Histories in Grain Microstructure Simulations of Additively Manufactured 316L SS
A-29: Laser Additive Manufacturing of Nanoparticles Reinforced Aluminum
A-30: Machine Learning Approaches to Optimize Additive Manufacturing Parameters for SLM of Inconel 718
A-31: Microstructure vs. Mechanical Properties for Different Al Alloys Deposited by Cold Spray Process
A-32: Modeling the Effects of Texture on Process-structure-property Evolution in Additively Manufactured Metals
A-33: Phase Field Modeling of Solidification Microstructure during Laser Sintering of Inconel 625
A-34: Physics Based Modeling of Laser Powder Bed Fusion Process Applied to Inconel 718
A-35: Prediction of the Balling Defect by a Mesoscale Transient Model Combining Heat Transfer and Fluid Flow
A-36: Progress toward Predicting Rapidly Solidified Microstructures of Metallic Alloys
A-37: Role of Grain Orientation and Prior Beta Grain Structures on the Anisotropic Behavior of Additively Manufactured Ti-6Al-4V Components
A-39: Sub-surface Material Interactions in Laser Polishing Electron Beam Additive Manufactured Ti6Al4V Components
A-40: Sulfuric Acid Corrosion to Simulate Microbial Influenced Corrosion on Stainless Steel 420
A-41: Synchrotron X-ray Characterization of Powder-bed Fusion Laser Melt Traces on Solid Nickel-based Super Alloy Plates
A-43: Utilization of In Situ Process Monitoring for Determining Consistency in Additive Manufacturing and Flaw Detection
A-4: Aiming for Modeling-assisted Tailored Designs for Additive Manufacturing
A-5: Alloy Design for Additive Manufacturing: Preliminary Results for Al-Ce Alloys
A-7: Build Theme Modifications to Investigate Microstructural Development in Additively Manufactured 17-4PH Stainless Steel Parts
A-8: Characterization of Carbide Precipitates in Nickel-Base Superalloy MAR-M247 Fabricated through Scanning Laser Epitaxy
A-9: Characterization of Dissimilar Joint between Inconel 718 and Alloy Steel by Laser Engineered Net Shaping
Accelerated Certification of Additively Manufactured Metals
Additive Manufacturing of Metals: Differing Microstructures with Varying Builds
Additively Manufactured 17-4 PH Stainless Steel: Toward Conventional Wrought Behavior
Alcoa Additive Manufacturing: A Revolution in the Making
AlSi10Mg Lattice Structures Processed by Selective Laser Melting: Influence of the Geometry and the Heat Treatments on the Microstructure
An Integrated Platform for Predicting the Mechanical Behavior of Additive Manufactured Metal Parts
Anisotropic Mechanical Behavior of AlSi10Mg Parts Produced by Selective Laser Melting
Characterization of Maraging Steel to Austenitic Stainless Steel Gradient Components Fabricated with Laser Deposition
Characterization of Multiperforated Plates Manufactured by SLM and EBM for Aeroengine Applications
Classification, Effects, and Prevention of Build Defects in Powder-bed Fusion Printed Inconel 718
Cloud-based Integrated Computational Microstructure-informed Response for Titanium Additive Manufacturing
Development of Ti-6Al-4V to 304L Stainless Steel Functionally Graded Components Fabricated with Laser Deposition
Direct Laser Metal Deposition of Eutectic Al-Si Alloy for Automotive Applications
Effect of Laser Scan Strategy on Microstructure-property Relations in Additively Manufactured Stainless Steel
Emerging High-strength Aluminum Alloys for Selective Laser Melting
Evolution of Aluminum Alloys Structure at Production Phases of 3D Products by Methods of Additive Technologies
Fracture and Fatigue Behavior of Additively Manufactured Austenitic Stainless Steel
Fundamental Study of the Effect of Process Variables in LMD Repairs with Inconel 718
Grain Structure Engineering for Metal Additive Manufacturing
High Strain Rate Mechanical Behavior of Stainless Steel 316L Processed by Selective Laser Melting
In Situ Characterization of Defects Formation and Microstructure Evolution in Selective Laser Melting of Metals
In Situ Structure and Microstructure Investigation of Heat Treatment’s Effect on AM Inconel 625
In Situ Time and Location Resolved Measurements of Residual Stresses in Additively Manufactured 308L Stainless Steel
Influence of Feedstock Characteristics in Additive Manufacturing
Influence of Processing Parameters on the Development of Microstructure and Texture in EBM Ti-6Al-4V
Investigating Strain Localization in DMLS TI-6Al-4V Using CPFE Modeling and DIC
Investigating the Role of Porosity in DMLS IN718 by Crystal Plasticity Modeling with Experimental Validation
Investigation into the Different Behavior of Gas and Water Atomized 316L Stainless Steel Powders in Selective Laser Melting
Investigation on the Effect of Process Parameters on the Grain Structures Formed during Wire-arc Additive Manufacture (WAAM) of 2xxx Series Aluminium Alloys
Location- and Orientation-dependent Properties in AM Systems
Mapping the Decomposition of β to α in Composition and Temperature Space in Titanium Alloys
Massive Transformation in Ti-6Al-4V Additively Manufactured by Selective Electron Beam Melting
Mechanical Properties of SS316L Manufactured by Laser Powder Bed Additive Manufacturing
Microstructural Control in SLM Ti-6Al-4V: Key Factors Facilitating In Situ α Martensite Decomposition
Microstructural Evolution and Fatigue Behavior of SLM Processed Alloy IN625
Microstructure and Mechanical Behavior of Additively Manufactured Austenitic Stainless Steel
Microstructure and Mechanical Properties Evolution of Biomedical Co-Cr-Mo Alloys Produced by Electron Beam Additive Manufacturing
Microstructure Control in Additive Manufacturing of Aluminum Alloys
Microstructure Evolution, Tensile and Dynamic Properties, and Computational Modeling in Ti-6Al-4V and Inconel 718 Alloys Manufactured by Laser Engineered Net Shaping
Multiphase Samples Built by Additive Manufacturing
Multiscale Modeling of Coupled Melt Pool Evolution and Solidification Morphology in the LENS Process
Numerical and Experimental Investigation of Residual Stress Evolution in Additively Manufactured 17-4 PH Stainless Steel by Selective Laser Melting
On the Development of a α+α' Dual-Phase Microstructure for Electron Beam Melted Ti-6Al-4V: Tensile Behavior and Thermal Stability
Porosity Determination in Powder Bed Aluminum Alloy
Process Window Optimization for Powder Bed Additively Manufactured Molybdenum
Recent Progress in Low-cost Open-source Metal 3-D Printing
Selective Electron Beam Melting: A Powder Bed Based Additive Manufacturing Technology for High Performance Materials
Small Features and Microstructures in 3D Printed Heat Exchangers
Study on the Effects of Microsegregation, Temperature, and Stress on IN625 Microstructures by Phase Field Simulations
Synchrotron X-ray and Neutron Diffraction Measurements of Multi-scale Full Tensor Residual Stresses in Nickel-based Super Alloy Built through Direct Metal Laser Sintering Technique of Additive Manufacturing
Tailoring the Mechanical Properties of Ni-base Superalloys Processed by Direct Metal Laser Melting (DMLM)
The Effect Process Parameters have on Residual Stress and Texture of Additively Manufactured Ti-6Al-4V Components
The Origin and Effect of HAZ Banding in Large Scale Wire-Arc Additive Manufacture with Ti-6Al-4V
Three-dimensional Tomography of EBM-manufactured IN718
Understanding Structure Property Relationships in Electron Beam Melting through Data Analytics and Visualization
Understanding the Columnar-to-Equiaxed Transition in Additive Manufacturing

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