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Meeting Materials Science & Technology 2019
Symposium Ultra High Performance Metallic Systems for Aerospace, Defense, and Automotive Applications
Presentation Title Effects of Pd Addition to High Strength NiTiHf Shape Memory Alloys
Author(s) Guher Pelin Pelin Toker, Soheil Saedi , Dipak Banerjee, Haluk Karaca
On-Site Speaker (Planned) Soheil Saedi
Abstract Scope Binary NiTi alloys have already gained immense popularity in the biomedical industry. However, they possess adequate limitations i.e. low strength and transformation temperature that has constrained their implementation in many other potential applications. Addition of ternary Hf element has been proven to be very effective to improve the strength and increase the transformation temperatures of the conventional NiTi. However, high strength NiTiHf alloys suffer from high brittleness and low transformation strain. Our studies show that the addition of even minor (3-5 %at) Pd content could overcome these drawbacks. In current study, two different compositions Ni47.3Ti29.7Hf20Pd3 and Ni43.3Ti31.7Hf20Pd5 (% at) were investigated. Following a systematic aging study, transformation temperature, microstructure, and shape memory response of the alloys were characterized. Both alloys were found to show a desirable combination of high transformation temperatures, strain recovery, strength, and ductility.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Bulk-state reaction for synthesizing bulk hybrid alloys through high-pressure torsion
Cold Work-Induced Strain Glass States in Ni49.5Ti50.5 SMA Plates
Deformation Behavior of Al0.4CoCrFeNi High Entropy Alloy
Development of Nb-Si Based Ultrahigh Temperature Alloys
Development of Novel Castable Structural Aluminum Alloys for Elevated Temperature Applications
Effect of Thermal History on Mechanical and Wear Properties of Bulk Metallic Glass Spacecraft Components
Effects of Pd Addition to High Strength NiTiHf Shape Memory Alloys
Evolution in Mechanical Response, Phase Transformation and Texture of Titanium Aluminide processed by High-Pressure Torsion
First-principles Methods of Investigating Stacking Fault Energies in Refractory BCC High-entropy Alloys
Hierarchical Nanoporous Metals
In-situ Studies of Strain Rate Effects on Phase Transformations and Microstructural Evolution in β-Titanium
Influence of Equal-Channel Angular Pressing on the microstructure, the corrosion and the fatigue-corrosion behavior of a 6xxx aluminum alloy for automotive conductors
Location-Specific Mechanical Property Enhancement of Atomically Ordered Fe-Co-V Soft Magnetic Alloys
Macroscopic Ferroelastic Response of Processing-Induced Strain Glass Alloys under Tension, Compression, and Bending
Mechanical Behavior of Mo Solid Solutions with Minor B and Si Additions
Mechanism Controlled Rolling
Microstructural Characterization and High Temperature Oxidation of High Entropy Nb-Cr-W-Ta-V alloy between 600 and 1400oC
Multi Length-scale Mechanical Property Measurements in Ti-based Bulk Metallic Glass-matrix Composites (BMG-MCs): New Insights on Deformation Mechanisms in the Glass Phase
Nanoindentation Measurements of Crystal Orientation Anisotropy in Elastic and Plastic Properties of Ti-Pt-Ni-Hf Shape Memory Alloys
Outstanding Fracture Toughness and Fatigue Strength of a Cast Al-Cu Alloy Promoted by Nanoparticles
P2-86: Combinatorial Studies on Refractory High-entropy Alloys via Directed Vapor Deposition
P2-87: Improvement of Technological Processes Obtaining a Heat-resistant Nickel Alloys for Turbine Blades Using Foundry Return
P2-88: Improvements in Mechanical Properties of Aerospace Grade Al-Li Alloys Through the Application of High-Pressure Torsion
Precipitate Formation Mechanisms During High-Shear Solid Phase Processing Events
Role of Cu Content in Determining the Mechanical Behavior of Cast Al-Cu-Mn-Zr Alloys
Solid Phase Processing of Copper/Graphene Alloys with Ultra-high Conductivity
Structures Formed under High Strain Deformation of Ni-based Superalloys
Thermal behavior of ultra-fine gradient microstructure via severe plastic deformation
Titanium Alloys with Radially Distributed Porosity and Structural Hierarchy

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