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Article
Prevalence of Heteroepitaxial Recrystallization in the Low Solvus High Refractory (LSHR) γ–γ′ Superalloy
Heteroepitaxial recrystallization (HeRX) is a recently discovered recrystallization mechanism that can occur during thermomechanical processing of Ni-base superalloys. It is important to understand this mechan...
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Article
A Heat Treatment to Produce a Coarse-α-Particle Size in Ti–6Al–4V
A heat-treatment method to develop a coarse-α-particle size in Ti–6Al–4V with a fully-globular (equiaxed) microstructure was developed. It comprises an initial isothermal high-temperature coarsening treatment fol...
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Article
Effect of Microtextured Region Stereology on Crack Growth Lifetime Predictions in Ti-6Al-4V
The fatigue life of near-alpha titanium alloys in service can be reduced by the presence of clusters of alpha phase with similar c-axis orientations, known as micro-textured regions (MTRs) or macrozones. MTRs pro...
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Article
Correction to: Non-linear Transfer Functions for Accurately Estimating 3D Particle Size, Distribution, and Expected Error from 2D Cross Sections of a Lognormal Distribution of Spherical Particles
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Article
An Investigation of the Development of Coarse Grains During β Annealing of Hot-Forged Ti-6Al-4V
Process variables contributing to the development of non-uniform, coarse grains during β annealing following subtransus conventional forging of the α/β titanium alloy Ti-6Al-4V were investigated using subscale...
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Article
Non-linear Transfer Functions for Accurately Estimating 3D Particle Size, Distribution, and Expected Error from 2D Cross Sections of a Lognormal Distribution of Spherical Particles
Accurately estimating the mean size of features within an opaque material using only 2D observations is a common requirement in the materials and medical communities. Attempting to employ numerical methods to ...
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Article
Characterization of Martensite Orientation Relationships in Steels and Ferrous Alloys from EBSD Data Using Bayesian Inference
Detailed analysis of the characteristics a martensite structure inherits from the parent austenite phase requires knowledge of the crystallographic orientation relationship between austenite and martensite, wh...
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Article
High-Temperature Static Coarsening of Gamma-Prime Precipitates in NiAlCr-X Single Crystals
The high-temperature coarsening behavior of γ′ precipitates in a series of NiAlCr, NiAlCrTi, NiAlCrW, and NiAlCrTa single-crystal alloys was determined at temperatures between 1158 K and 1473 K (885 °C and 120...
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Article
Dissolution of the Alpha Phase in Ti-6Al-4V During Isothermal and Continuous Heat Treatment
The kinetics of the dissolution of the equiaxed alpha phase into the beta matrix in Ti-6Al-4V were established and modeled for both isothermal (constant temperature) and transient/continuous heating conditions...
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Article
Analysis of Misorientation Relationships Between Austenite Parents and Twins
The forward transformation from face-centered cubic austenite to body-centered cubic/tetragonal martensite in ferrous alloys can significantly influence the microstructure and mechanical properties of the mate...
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Article
A Transfer Function for Relating Mean 2D Cross-Section Measurements to Mean 3D Particle Sizes
It is common practice to estimate mean 3D particle and grain size of polycrystalline materials by multiplying 2D cross-sectional measurements by a multiplication factor. However, the most frequently used multi...
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Article
Delineation of Prior Austenite Grain Boundaries in a Low-Alloy High-Performance Steel
Characterization of prior austenite grain size is important for understanding the microstructure–property relationships in steels. The prior austenite grain size plays an important role in defining the microst...
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Article
The Kinetics of Precipitate Dissolution in a Nickel-Base Superalloy
The effect of microstructure and soft im**ement on the kinetics of static dissolution of γ′ precipitates during supersolvus solution treatment of the powder-metallurgy nickel-base superalloy LSHR were determine...
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Article
Analysis of EBSD Grain Size Measurements Using Microstructure Simulations and a Customizable Pattern Matching Library for Grain Perimeter Estimation
Grain size data from electron backscatter diffraction (EBSD) maps are often reported as the mean of the circle equivalent diameters of the measured grain areas. Circle equivalent diameters are not directly com...
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Article
Plastic Flow and Microstructure Evolution during Thermomechanical Processing of a PM Nickel-Base Superalloy
Plastic flow and microstructure evolution during sub- and supersolvus forging and subsequent supersolvus heat treatment of the powder-metallurgy superalloy LSHR (low-solvus, high-refractory) were investigated ...
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Article
Experimental measurement of the kinetics of gamma prime dissolution during supersolvus heat treatment of powder metallurgical Ni-based disk superalloys
During heat treatment of Ni-based superalloys, the rate of change of gamma prime phase particle sizes and volume fractions affect the final grain size and thus the material’s mechanical properties. Experimenta...
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Article
Microstructure Evolution during Supersolvus Heat Treatment of a Powder Metallurgy Nickel-Base Superalloy
Microstructure evolution during the supersolvus heat treatment of a powder-metallurgy, low-solvus, high-refractory (LSHR) superalloy was established. For this purpose, three lots of LSHR with varying initial c...
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Article
The effectiveness of coincidence site lattice criteria in predicting creep cavitation resistance
The coincidence site lattice (CSL) concept is often used in microstructural characterization by researchers studying grain boundary engineering as a method for improving the performance of polycrystalline mate...
