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Meeting MS&T24: Materials Science & Technology
Symposium Computational Materials for Qualification and Certification
Presentation Title Durability and Damage Tolerance of Powder-Bed Fusion Ti-6Al-4V: Current Results and Modeling Needs
Author(s) Matthew Krug, Patrick Golden, Sushant K. Jha, Reji John
On-Site Speaker (Planned) Matthew Krug
Abstract Scope The Aircraft Structural Integrity Program of the U.S. Air Force establishes the equivalent initial damage size (EIDS) distribution as an important durability and damage tolerance metric. Results of an effort to develop EIDS distributions for powder-bed fusion Ti-6Al-4V are presented here. It is shown that the surface condition (as-built versus low-stress grinding) determines the class of the initiating defect and the distribution of fatigue lives and EIDS values. Additionally, size distributions of volumetric defects and of surface-roughness features are quantified by destructive and non-destructive means, and are compared to the distributions of crack-initiating features measured from fractography. Using such distributions and measured crack growth rates, probabilistic methods for minimum life prediction are presented. Both additional experiments and advancements in available computational models are needed jointly to improve prediction of life and of EIDS distributions, in particular when increasing complexity from simple lab specimens to real components with complex geometries.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Computational Multiscale Approach for Predicting Macroscale Elastic Properties and Failure Initiation in Phenolic Impregnated Carbon Ablator
A Framework for Assessing Simulation Maturity
Additive Manufacturing Porosity Estimation Using Multiple Nondestructive Evaluation Techniques
America Makes Efforts in Advanced Qualification Methods for AM
Assessing the Impact of Melt Pool Geometry Variability on Lack-of-Fusion Porosity and Fatigue Life in Powder Bed Fusion - Laser Beam Ti-6Al-4V
Computational Framework for Spatially-Dependent Melt Pool and Microstructure Simulations of Additively Manufactured Material
Computational Investigation on the Combined Effect of Pore Attributes on Strain Concentrators in Metal Additively Manufactured Materials
Computational Materials for Qualification and Certification Steering Group and Community Vision Roadmap
Computational Tools for Advancing Materials Maturity in Additive Manufacturing
Convolution-Based Numerical Solutions of Transient Temperature Fields during Powder Bed Fusion Additive Manufacturing: Theory, Accuracy, and Computational Cost
Correlations of Additive Manufacturing Model-Based Process Metrics With Spatter-Induced Porosity in the Powder Bed Fusion-Laser Beam/Metallic Process
Data-Driven Process Uncertainty Analysis of Stochastic Lack-of-Fusion in Laser Powder Bed Fusion
Development of Computational Materials Workflows for Additively Manufactured Metallic Materials to Enable Accelerated Prediction of Fatigue Performance
Durability and Damage Tolerance of Powder-Bed Fusion Ti-6Al-4V: Current Results and Modeling Needs
Efficient Sensitivity and Uncertainty Analysis of a Laser Powder Bed Fusion Thermal Model Built Using HYPAD-FEM
Enabling Rapid Aerospace Component Qualification and Certification: Integrated Model-Based Material Definitions in Additive Manufacturing
Fast, Cheap & In Control: Application of Surrogate Models to Explore Microstructure-Properties Relationships for AM-Based Materials
GO-MELT: GPU-Optimized Multilevel Execution of LPBF Thermal Simulations
Industry's Vision for the Use of Computational Materials Tools in Qualification and Certification
Lessons Learned Calibration and Validation of Process Models for Laser Powder Bed Fusion Additive Manufacturing
Machine Learning Enabled Parametrically Upscaled Constitutive Models for Fatigue Simulations: A Data-Driven Multiscale Modeling Approach
Materials Data for Validation and Verification of Mechanical Performance: Outcomes and Future Perspectives from the AM Benchmark Series
Physics-Based Modeling of Ti-6Al-4V Phase Transformations for PBF-LB Temperature Histories
Process Sensitivity of Laser Powder Bed Fusion of IN718 to Composition Variation
Quantification of Microstructure-Induced Uncertainty in Fatigue Nucleation in Polycrystalline Materials
Quantifying Microstructure Evolution of LPBF Ni-Alloy Under High Temperatures Exposure Through Computer Vision
QUASAR – Assessment of the State of the Art and Gaps for AM of Fracture Critical Components
Review of Past and Future Impacts of the Additive Manufacturing Benchmark Test Series (AM Bench)
Scientific AI for Automated Validation and Certification
Towards a Digital Twin for Qualification and Certification of Metals Additive Manufacturing
Towards a Probabilitic Model for the Assessment of Gas Turbine Components
Transitioning from Basic Research to Industrial Applications for Metal AM Components
Uncertainty Quantification and Sensitivity Analysis in Process-Structure-Property Simulations for Laser Powder Bed Fusion Additive Manufacturing
Uncertainty Quantification in Process-Structure-Property Dynamics of IN718
Using Unsupervised Learning to Cluster Fatigue Life Based on Ti64 Fatigue Fracture Surface Characteristics
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