Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

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Considering particle morphology in a constitutive model for metal powders compaction
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - - 1999
T. Calvin Tszeng
Creep deformation characteristics of tin and tin-based electronic solder alloys
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 36 - Trang 99-105 - 2005
M. D. Mathew, H. Yang, S. Movva, K. L. Murty
Creep deformation characteristics of pure tin, and Sn-3.5Ag and Sn-5Sb electronic solder alloys, have been studied at various temperatures between ambient and 473 K (homologous temperature 0.58 to 0.85). Power-law relationships between strain rate and stress were observed at most of the temperatures. The stress exponent (n=7.6, 5.0, and 5.0) and activation energy (Q ...... hiện toàn bộ
Effect of Stress Level on the High Temperature Deformation and Fracture Mechanisms of Ti-45Al-2Nb-2Mn-0.8 vol. pct TiB2: An In Situ Experimental Study
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 44 - Trang 1887-1896 - 2012
Rocío Muñoz-Moreno, M. Teresa Pérez-Prado, Javier Llorca, Elisa María Ruiz-Navas, Carl J. Boehlert
The effect of the applied stress on the deformation and crack nucleation and propagation mechanisms of a γ-TiAl intermetallic alloy (Ti-45Al-2Nb-2Mn (at. pct)-0.8 vol. pct TiB2) was examined by means of in situ tensile (constant strain rate) and tensile-creep (constant load) experiments performed at 973 K (700 °C) using a scanning electron microscope. Colony boundary cracking developed during the ...... hiện toàn bộ
Solution Heat Treatment Optimization of Fourth-Generation Single-Crystal Nickel-Base Superalloys
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 43 - Trang 3264-3282 - 2012
Hon Tong Pang, Lijuan Zhang, Robbie A. Hobbs, Howard J. Stone, Catherine M.F. Rae
The optimization of the solution heat treatment (SHT) of fourth-generation single-crystal nickel-base superalloys LDSX-6B and LDSX-6C is presented. The methodological approach to optimizing the SHT process is particularly highlighted. Differential scanning calorimetry (DSC) measurements and electron-probe microanalysis (EPMA) mapping were carried out to investigate material properties in the as-ca...... hiện toàn bộ
A Thermophysical Perspective of the Inter-relationship between Debye Temperature and Electron Density
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 52 - Trang 242-256 - 2020
Subramanian Raju
A comprehensive thermophysical analysis of the linkage between the Debye temperature θD and electron density ne has been presented. Assuming that the Debye cut-off frequency ωD is related to the effective oscillation frequency ω of screened ion cores of a metallic material, a simple analytical relationship could be established between θD, bonding electron density ne, and materials density ρm. Alte...... hiện toàn bộ
Effect of Powder Recycling on Defect Formation in Electron Beam Melted Alloy 718
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 51 - Trang 2430-2443 - 2020
Hans Gruber, Cosmina Luchian, Eduard Hryha, Lars Nyborg
The extent to which powder recycling can be permitted before risking a loss in performance of critical components is a major aspect for the viability of electron beam melting (EBM). In this study, the influence of powder oxidation during multi-cycle EBM processing on the formation of oxide-related defects in Alloy 718 is investigated. The amount of defects and their distribution in samples produce...... hiện toàn bộ
Plasma Electrolytic Oxidation (PEO) Process on Commercially Pure Ti Surface: Effects of Electrolyte on the Microstructure and Corrosion Behavior of Coatings
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - - 2018
Arash Fattah‐alhosseini, Mohsen Keshavarz, Maryam Molaei, Seyed Omid Gashti
Early Stages of Microstructure and Texture Evolution during Beta Annealing of Ti-6Al-4V
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 49 - Trang 908-919 - 2017
A. L. Pilchak, G. A. Sargent, S. L. Semiatin
The early stages of microstructure evolution during annealing of Ti-6Al-4V in the beta phase field were established. For this purpose, a series of short-time heat treatments was performed using sheet samples that had a noticeable degree of alpha-phase microtexture in the as-received condition. Reconstruction of the beta-grain structure from electron-backscatter-diffraction measurements of the room...... hiện toàn bộ
Effect of Variable Stress Intensity Factor on Hydrogen Environment Assisted Cracking
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - - 2010
M.M. Hall
Fitness-for-service evaluations of engineered components that are subject to environment assisted cracking (EAC) often require analyses of potentially large crack extensions through regions of variable stress intensity. However, there are few EAC data and models that directly address the effects of variable stress intensity factor on EAC crack growth. The model developed here is used to evaluate s...... hiện toàn bộ
Deformed microstructure of the single-crystal superalloy NASAIR 100 at 1050 °C
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - - 1999
Xuhong Guo, Hengzhi Fu, Jiahua Sun, Kiyoshi Kusabiraki
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