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Meeting Materials Science & Technology 2020
Symposium Micro- and Nano-Mechanical Behavior of Materials
Presentation Title In Situ Nanomechanics of Ni-based Superalloys and Bond Coating: Effect of Temperature
Author(s) Sanjit Bhowmick, Eric Hintsala, Douglas Stauffer
On-Site Speaker (Planned) Sanjit Bhowmick
Abstract Scope High-strength structural materials such as Ni-based superalloys and diffusion bond coats are widely used in challenging environments and with exposure to mechanical fatigue, particle impact, and erosion at elevated temperatures. Diffusion platinum-aluminide bond coats are an example of compositionally and microstructurally graded coatings with significant variation in engineered mechanical properties across the cross-section. In this study, an SEM nanomechanical instrument with an integrated high-temperature stage and an active tip heating was used to conduct pillar compression of aluminide bond coating and substrate at room temperature to well above 800degC. This is the first study of an in situ nanomechanical testing of any sample at such higher temperature with capturing deformation events in detail at that temperature. With combined analysis of chemistry and microstructural changes, the results were used to understand local mechanical properties variation as a function of temperature.


An Integrated In Situ Solution for Automated Material Testing in SEM
Atomistic Simulations of Collisions between SiC Nanoparticles
Characterization of Dislocation Avalanches by In Situ Micropillar Compression Tests with Simultaneously Detected Acoustic Emission
Characterization of Electroless Copper Deposits on Electrospun PAN Fibers in Aligned and Random Configurations
Characterization of Fatigue Damage Behavior in Unidirectional Carbon Fiber Reinforced Plastic Laminates
Computer Vision Approach to Study Surface Deformation of Materials
Cyclo[18]carbon as an Ultra-flexible Material
Diffusion Induced Abnormal Softening Behaviors in Nanocrystals
Effects of Testing Temperature and Sample-size on Tensile Deformation of Metallic Glass
Exploring Small-scale Quasicrystal Plasticity in Unknown Temperature Regimes and Compositions
Gradatim Ferociter: Exploring the Grain Size Stability of Heterogeneous Copper in Thermal, Mechanical and Radiation Environments
In Situ Nanomechanical Testing of Piezoresistive Materials
In Situ Nanomechanics of Ni-based Superalloys and Bond Coating: Effect of Temperature
Introductory Comments: Micro- and Nano-Mechanical Behavior of Materials
Mechanical Behavior of Resilin-mimicking Materials
Mechanical Properties of Hybrid Core-shell Ceramic Nanoparticles
Microparticle Impacts at Supersonic Speeds, and the Role of Surface Layers
Persistent, Inelastic Cycling Behavior in Rare Earth Orthophosphate Ceramics
Processing, Characterization, and Modeling of Nano-twinned Alloys: Understanding the Role that Controlling and Tuning of Microstructure has in Dislocation-twin Interactions
Quantitative Evaluation of Large Nanoindentation Data Sets
Small-Scale Mechanical Behavior of Ion-irradiated Amorphous Metals versus Multi-Principal Alloys
Spatial-temporal Investigation of Shear Bands in Bulk Metallic Glasses
Temperature-dependent Intermittent Plasticity of Nb Microcrystals
Time-resolved Atomic-scale Observations of Deformation and Fracture of Nanostructured Materials
Twinning and Detwinning in Small-sized Crystals

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