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Meeting MS&T23: Materials Science & Technology
Symposium Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
Presentation Title Laser Powder Directed Energy Deposition of 17-7 PH Stainless Steel
Author(s) Alex L Barbosa, Fabio E Mariani, Rodrigo G Dourado da Silva, Piter Gargarella, Reginaldo T Coelho, Kahl D. Zilnyk, Antonio J Ramirez
On-Site Speaker (Planned) Kahl D. Zilnyk
Abstract Scope Precipitation hardening (PH) stainless steels are some of the most employed ferrous alloys in additive manufacturing, but most studies are focused on martensitic grades. Comparatively, semi-austenitic PH steels have higher corrosion resistance and yield strength, combined with higher machinability. This last property is due to the matrix being austenitic before the final heat treatments, making them suitable for hybrid manufacturing processes (e.g. DED followed by milling). However, their microstructures are extremely dependent on the thermal history. Single tracks of 17-7 PH semi-austenitic stainless steel were deposited by Laser Powder Directed Energy Deposition using 24 different parameter combinations (laser power and speed, powder feed rate). The bead height, the substrate dilution rate and the δ-ferrite fraction were analyzed. The results show a complex, non-linear relationship with process parameters. Numerical heat transfer simulations and thermodynamic calculations show that the solidification mode changes from ferritic to austenitic when the thermal input is reduced.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Material Binning Approach to Laser Powder Manufacturing of Multi-material Composition Structures
Additive Manufacturing of Tungsten through Novel Multi Laser Processing
Additive Manufacturing Wire Feedstocks Derived from Recycled Aluminum
Characterization of Biodegradable Mg-1.2Zn-0.5Ca-0.5Mn Alloy Powder for Additive Manufacturing
Corrosion Fatigue Characteristics of Laser Powder Bed Fused 316L Stainless Steels in Chloride-containing Solution
Densification and Microstructural Evolution and Characterization of Binder Jet Printed and Sintered Porous Ni-Mn-Ga Magnetic Shape-Memory Alloys
Development and Characterization of Aluminum Alloy A20X Lattices
Development of Metal Powders for Additive Manufacturing
Development of Titanium-Zirconium-Molybdenum Alloy for Structural Material Usage in Microreactors
Effect of Post-processing on Porosity, Secondary Phases, and Mechanical Behavior of Binder Jet Fabricated Stainless Steels
Effect of Printing Parameters, Print Orientation, and Surface Finish Effects on the Mechanical and Fatigue Behavior of A6061-RAM2
Effects of Process Parameters on Mechanical Behavior of Wire Arc Additively Manufactured (WAAM) AISI 316LSi
En-Situ Alloying by Powder Bed Doping to form Functionally Graded Materials with LPBF
Energy-efficient 4D Printing of Green Metals
Environmental Degradation of AM-fabricated Structural Alloys
Evaluation of Mechanical Property of Recycled AM AlSi10Mg
Evolution of the Texture and Variant Selection during Beta to Alpha Transformation in Wire Arc Additive Manufactured Nickel Aluminum Bronze
Functionally Graded Materials Compositional Path Design Considering Cracking Using Scheil and Equilibrium Simulations
Hot Deformation Behaviour of TiAlMn Alloys Fabricated Using Laser Engineered Net Shaping (LENS)
Identification of Phases in a NiCr-V FGM Fabricated via DED AM Through Experiments and Computational Modeling
In-situ Carbide-driven CoCrFeMnNi High-entropy Alloy Matrix Nanocomposites Manufactured by Laser Powder Bed Fusion: Carbon Content and Heat Treatment Effects on Microstructure, Room and Cryogenic Tensile, High Temperature Creep Properties
Influences of Introduced Oxide Dispersions on Failure Modes in Additively Manufactured Superalloy
Investigating the Processing-structure-property Relationship for AISI M2 High-speed Tool Steel Processed on Binder Jetting
Laser-scanning of Arc-melted Al Alloys: Are They Representative of Additively Manufactured Ones?
Laser Powder-bed Fusion of Ternary Al-Ce-X Alloys with Slow-diffusing Transition Metals (Mn, Cr, V, Mo, W)
Laser Powder Bed Fusion of Crack-free High Gamma Prime Rene 77 Superalloy: Processing, Heat Treatment, Mechanical Properties and Applications
Laser Powder Directed Energy Deposition of 17-7 PH Stainless Steel
Maraging Steel 350 Manufactured by Laser Powder Bed Fusion
Materials Characterization of AISI 8620 Steel Manufactured through DED System
Microstructure and Mechanical Properties of Alloy 718 Blocks by Wire Arc Additive Manufacturing
Monolithic and Bimetallic M250 Structures via WAAM
Multi-scale Processing-structure-property Relationships for Directed Energy Deposition
Nanoindentation Studies on the Surface Properties of Additively Manufactured Ni-base Alloys
Novel, Elevated Temperature Al-Ce-Mo Alloy Designed for Additive Manufacturing
On the Origin of Cracking in Laser Powder Bed Fusion Processed LaCe(Fe,Mn,Si)13, and the Impact of Post-Processing
Optimization of Aluminum Feedstock Powder for Cold Spray Additive Manufacturing Using a Through-process Experimental Approach
Origin of Epitaxy Loss in Laser Powder Bed Fusion
Parameter Optimization and Flaw Type Dependent Tensile Properties of 15-5PH Stainless Steel Manufactured by Laser Powder Bed Fusion
Powder Fabrication and Laser Powder Bed Fusion of Highly-reinforced Metal Matrix Composites
Prediction of Thermal Conductivity of Al-Alloys: Finite Element Simulations Combined with Statistical Analysis and Machine Learning
Processing-Microstructure-Properties Relations in Open Air Additive Manufacturing of Stainless Steel 316L
Processing-structure-property Relationship of 3D Printed Metals via Hot Wire Direct Energy Deposition
Properties of AlSi10Mg/SiC Composites Manufactured by Laser Powder Bed Fusion
Role of Microstructural Constituents on Deformation under Monotonic Tensile Strain of Additively Manufactured Ni-Al Bronze
Stress Relaxation Testing to Assess the Creep Performance of Inoculated Alloy 230 Processed with Laser Powder Bed Fusion
Study of Printability and Melt Pool Geometry in W&W-alloys by Additive Manufacturing
Surpassing know Creep Resistance for Haynes 282 through Wire Arc Additive Manufacturing
The Effect of Mg Content on the Process-structure Relationships of Cold Spray Deposited Al-Mg Alloys
Thermal Analysis for Characterizing Effects of Metallurgical Conditions in LDED Fabricated Ti-rich NiTi Shape Memory Alloys
Toward High Strength and High Conductivity Copper Alloys via Additive Manufacturing
Understanding Processing-Microstructure-Property Relationships for WAAM and LP-DED in Duplex Stainless Steels

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