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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
Presentation Title Variation and Impact of Surface Roughness on Fatigue in Laser Powder Bed Fusion
Author(s) Rachel Evans, Joy Gockel, Luke Sheridan
On-Site Speaker (Planned) Rachel Evans
Abstract Scope Although any type of defect can weaken the performance of an additively manufactured part, rough surfaces with deep notches have been shown in prior studies to be a leading cause in decreasing the fatigue life. However, there is a lack of understanding of the surface roughness, the variability, and the appropriate metrics to sufficiently represent the impact of the surface on the mechanical performance. This work investigates the surface roughness of specimens fabricated with laser powder bed fusion through the calculation and comparison of surface measurement metrics. After these metrics are calculated, the variation within each sample and across different surfaces is determined. The calculated metrics and variations are related to the expected impact that the surface will have on the fatigue performance through fracture mechanics methods. Results from this research will provide guidance towards surface roughness metric and sampling specifications to ensure quality parts with consistent mechanical performance.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3-D Convolutional Neural Networks for Pore Analysis in Metal Additive Manufacturing Builds
Automotive-specific Requirements for Additive Manufacturing of Metal Materials
Bayesian Inference of Elastic Constants and Texture Coefficients in Additively Manufactured Alloys Using Resonant Ultrasound Spectroscopy
Characterization of 3D-printed Metals with Ultrasonic Technique
Cold Spray of Al and 6061 Al Alloy Powders: Effects of Oxide Thickness
Critical Fracture Toughness of Al 6061 Cold Spray Deposits
Damage Tolerant Approach in Additively Manufactured Metallic Materials
Defect-based Fatigue Model for AlSi10Mg Produced by Laser Powder Bed Fusion Process
Design of Fatigue Resistant Additive Manufactured Austenitic Stainless Steels
Effect of Defects on Stress State Dependent Fracture of Additively Manufactured Metals
Effect of Laser Power, Laser Spot Size and Hatch Spacing on Mechanical and Microstructural Properties of 316L Stainless Steel Processed via Selective Laser Melting
Effect of Oxide and Hydroxide on Cold Spray of Titanium Particles
Effect of Thickness on Ultrasonic Fatigue Behavior of 316L Stainless Steel Made by Powder Bed Fusion Additive Manufacturing
Fatigue Crack Growth and Fracture Toughness Behavior of Laser Powder Bed Fusion Titanium Alloys
Fatigue Crack Growth Rate of Electron Beam Melted (EBM) Titanium Alloy (Ti-6Al-4V): Effect of Crystallographic Texture and Internal Porosity
Implementing Processing Strategies and Unique Hot Isostatic Pressing Treatments to Control Microstructure, Defect Content, and Mechanical Properties of Electron Beam Melted Ti-6Al-4V
Interplay between Geometry, Defects, and Porosity on the Mechanical Behavior of AM Components
Laser Powder Bed Fusion of Hydride-dehydride Ti-6Al-4V Powders: Effect of Hot Isostatic Pressing on Microstructure and Mechanical Properties
Laser Powder Bed Fusion of TiTa Alloys: Process Optimisation and Fatigue Properties
Managing Heat Buildup and Standardizing Melt Pool Dimensions in Laser Powder Bed Fusion through a “Powder Moat” Scan Strategy
Mechanical Behavior of Induced Lack of Fusion Flaws in AlSi10Mg
Microstructural Heterogeneity and Mechanical Anisotropy of 18Ni-330 Maraging Steel Fabricated by Selective Laser Melting: The Effect of Build Orientation and Height
Microstructure-based Model Validation and Predictions of Single-build-plate Fatigue Strength Sensitivity for Additively Manufactured Ti-6Al-4V
Notch Sensitivity of AlSi10Mg Aluminum Alloy Produced by Laser Powder Bed Fusion Process
Progressive Amplitude Fatigue Performance of Additively Manufactured Stainless Steel Superalloy
Quantifying Layer Uniformity in Ti6Al4V Hybrid Additively Manufactured Samples Using Ultrasound
Quantifying Surface Roughness in Additive Manufactured Ti-6AI-4V Using In-situ X-ray Imaging
State-of-the-Art in Predicting Fatigue Life for Applications in Metal-based Additive Manufacturing
Strain Accumulation during Fatigue and Fracture of Additively Manufactured Ti6Al4V: Experiments and Simulations
Structure-property Relationships to Explain the Elasto-plastic Anisotropy of Additively Manufactured Metal Alloys
Synchrotron Imaging of the Influence of TiB2 in Suppressing Hot Cracking during Laser Powder Bed Fusion of Al-2139
Synergistic Effects of Defects and Microstructure on Fatigue Behavior of LB-PBF Metallic Materials
Tensile and Fatigue Behavior of Cold Sprayed Material Using Heat Treated Feedstock Powders
The Inhomogeneous Microstructure and Properties of Ti-6Al-4V Additively Manufactured with Electron Beam Freeform Fabrication
Towards Validation for Computed Tomography Processes for Additive Manufacturing
Ultrasonic Nondestructive Characterization of Hybrid Additively Manufactured 420 Stainless Steel
Using Post Build Porosity Analysis to Inform Future Build Strategies
Variation and Impact of Surface Roughness on Fatigue in Laser Powder Bed Fusion

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