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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Environmental Degradation of Additively Manufactured Alloys
Presentation Title Microstructure and Electrochemical Response of Selective Laser Melted NiTi
Author(s) Anurag Srivastava, Chaudhry A Usman, Bilal Mansoor, Chen Zhang, Ibrahim Karaman, Alaa Elwany
On-Site Speaker (Planned) Anurag Srivastava
Abstract Scope This research fabricated the NiTi alloy cubes with SLM and explored the influence of laser power and hatch spacing on its microstructure and electrochemical response. Specimens were fabricated with different laser power, scan speed (80 W/330 mm.s-1, 200 W/1080 mm.s-1) and hatch spacing (64 Ám, 80 Ám). Electrochemical analyses, in Hanks’ Balanced Salt Solution at 37⁰C, were carried out on surfaces that were parallel and perpendicular to the building direction and were correlated to the microstructure. Microstructures of the specimens were investigated through optical microscopy and SEM. Our initial results indicate that the transverse surface presented columnar grains while the longitudinal surface showed chessboard-like grains. Electrochemical properties determined using electrochemical impedance spectroscopy and potentiodynamic polarization showed that samples fabricated with higher laser power, scan speed and lower hatch spacing had better corrosion properties. Pitting corrosion was observed with pits initiating from porosity defects present in the samples.
Proceedings Inclusion? Planned:
Keywords Other, Other, Other

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Biocorrosion Response of Heterogeneous Microstructure in Laser Additively Deposited CoCrMo
Biocorrosion Response of Laser Additively Deposited TiNbSn Alloy in Physiological Medium
Combining NanoSIMS and EBSD Analysis to Define Hydrogen Trapping in Additively-manufactured Stainless Steel 316L
Comparing the Corrosion Response of Wrought and Cold Sprayed Aluminum Alloys
Corrosion and Wear-resistant Coatings for Nuclear and Automotive Applications by Using High-pressure Cold Spray Technology
Corrosion Behavior of 7050 and 7075 Aluminum Alloys Processed through Reactive Additive Manufacturing
Corrosion Behavior of Additively Manufactured Al-Ce-X and Al-10SiMg Alloys in 3.5 wt.% NaCl Solution
Corrosion Behavior of Additively Manufactured Al-Cr-Mn-Co-Zr Alloys
Corrosion Mechanisms of Additively Manufactured 316L Stainless Steels in Chloride Solutions
Electrochemical Behavior of Laser Powder Bed Fusion FeCrAl Alloys
Evaluation of Hydrogen Diffusivity, Uptake, and Trapping in Additively Manufactured 17-4 PH Stainless Steel and Possible Consequences Towards Stress Corrosion Cracking
High-pressure Cold Spray (HPCS) Coatings for Repair and Retrofit of Existing Large-scale Structures
High-temperature Oxidation Behavior of Additively Manufactured Haynes 282 Samples in Direct-fired Supercritical CO2 Power Cycle Environments
Hydrogen Embrittlement of Cathodically Pre-charged Inconel 718 Fabricated via Selective Laser Melting
Impact of the Gas Composition on Oxide Scales formed on Ni-based Alloys in Metal Dusting Conditions
Influence of Feedstock on Corrosion of Additively Manufactured 316L Stainless Steel
Local Corrosion Initiation Sites of Additively Manufactured Selective Laser Melted 316L Stainless Steel
Localized Corrosion of Additively Manufactured Stainless Steel in Atmospheric Environments
Metal Dusting and Surface Treatment of Additively Manufactured Ni-Cu Alloys and Alloy 699XA
Microstructure and Electrochemical Response of Selective Laser Melted NiTi
Small-Scale Mechanical and Corrosion Properties of Additively Manufactured Stainless Steel
Stress Corrosion Cracking Growth in Additively Manufactured 316L Stainless Steel
Structure and Semiconducting Properties of the Passive Film Formed on Additively Manufactured 316L Stainless Steel
The Effect of Hydrogen Embrittlement on Additively Manufactured IN718 in Dependency of the Delta Phase Volume Fraction
The Process-Structure-Performance Correlations of Additively Manufactured Steels Exposed to High Dose Neutron Irradiations
Thermal response of Additive Manufactured Alloys Submitted to Transient High Heat Flux Testing

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