Article
Chemistry, Analytical
Stenio Cristaldo Heck, Marcelo Falcao de Oliveira, Eduardo Radovanovic
Summary: In this study, low-purity titanium metal was successfully produced using natural rutile sand through the FFC process. The process parameters were optimized to improve the reaction rate.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Chemical
William Spencer, Don Ibana, Pritam Singh, Aleksandar N. Nikoloski
Summary: This study assessed the technical feasibility of using biofuels as renewable reductants in the production of synthetic rutile. The results indicate that biofuels can be alternatives to coal in the production of synthetic rutile from ilmenite.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
William Spencer, Don Ibana, Pritam Singh, Aleksandar N. Nikoloski
Summary: This study characterized ilmenite feed using various analytical techniques and examined the effects of feed properties on the quality of synthetic rutile. The research found that the BET surface area and impurity content of the feed ilmenite have a significant impact on the quality of the synthetic rutile.
MINERALS ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Jong Hyeon Lee, Hayk Nersisyan, Thanh-Nam Huynh, Kyu-Seok Lim, Wan-Bae Kim, Woo-Seok Choi
Summary: In this study, a Ti-rich ingot was prepared using an alumino-magnesiothermic reduction approach, and the synthesis conditions were optimized. XRD analysis confirmed the single-phase Ti metal obtained.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2022)
Article
Engineering, Chemical
H. C. S. Subasinghe, Amila Sandaruwan Ratnayake
Summary: This study focuses on upgrading Sri Lankan ilmenite sands to synthetic rutile via a mechanochemical method involving ball milling-induced sulphurisation and carbothermic reductions. The results show that ilmenite-additive mixtures containing both sulphur and graphite (ISG) converted to nanoparticles after 6 hours of ball milling, with ISG samples achieving the best results after isothermal annealing at temperatures ranging from 800 to 1200 degrees Celsius.
MINERALS ENGINEERING
(2021)
Article
Chemistry, Physical
Junjie Jiang, Constantine Tsounis, Leighanne C. Gallington, Yongfeng Hu, Robert W. J. Scott, Jason A. Scott, Nicholas M. Bedford
Summary: Metal oxide nanomaterials synthesized using a biomineralization-inspired method have been shown to have increased surface area and controllable catalytic properties. The use of protamine as a protein template resulted in largely disordered materials with changes in atomic structure dependent on synthetic conditions. Removal of protamine and subsequent hydrogenation induced defects in the materials while retaining their disordered nature, showing potential for controlling catalytic properties using benign synthetic strategies.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Alessandro Carrozza, Federico Mazzucato, Alberta Aversa, Mariangela Lombardi, Federica Bondioli, Sara Biamino, Anna Valente, Paolo Fino
Summary: Directed energy deposition is an additive manufacturing technology that uses single scan method to reduce deposition time and material usage, to find the most suitable process window. Analysis of Ti-6Al-4V single scans with 50 different parameters combinations revealed relationship between microstructure and process parameters.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
C. C. Li, C. Xin, Q. Wang, J. Q. Ren, B. Zhao, J. P. Wu, X. L. Pan, X. F. Lu
Summary: A novel metastable beta-titanium alloy with low cost and high strength was designed using the D-electron theory approach. After solution treatment and aging at different temperatures, a multiscale structure composed of beta matrix, primary alpha p, and precipitates alpha s was obtained. The tensile properties were sensitive to the density and spacing of precipitates alpha s inside the beta matrix, with a high combination of tensile strength and elongation achieved at a specific aging temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Lijun Wang, Zhengxu Li, Yinan Jiang, Takaomi Itoi, Hiroyuki Yoshida, Yun Lu
Summary: Nonstoichiometric TiO2-x compacts were obtained via spark plasma sintering and their thermoelectric properties were investigated. The introduction of oxygen deficiencies positively affected the electrical resistivity and thermal conductivity, but decreased the Seebeck coefficient.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Dino Alferi, Jaroslav Fojt, Eva Kristianova, Derek W. Edwards, Hans-Ulrich Laasch
Summary: This research investigates the influence of different qualities of raw metal alloys and production technology on the corrosion resistance of esophageal nitinol stents. Results show that both raw material and certain steps in the manufacturing process negatively affect corrosion resistance. Additionally, the current accepted standard test methods are inadequate for assessing susceptibility to corrosion by gastric acid.
Article
Materials Science, Multidisciplinary
Zhanjun Wang, Minseok Seo, Il Sohn
Summary: Direct synthesis of TiAl alloys through magnesiothermic reduction was demonstrated, with XRD results confirming the optimal conditions for synthesis. The study showed that a dense Al2O3 film could be easily generated on the surface of the TiAl alloy to prevent further oxidation, and the by-products mainly consisted of MgAl2O4 spinel.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Xue-yi Guo, Zhao-wang Dong, Yang Xia, Pei-dong Liu, Han-ning Liu, Qing-hua Tian
Summary: A high-purity Ti-48Al-2Nb-2Cr alloy powder with low oxygen content and small particle size was successfully produced through reduction with magnesium and deoxidation with calcium. The phase and composition analysis showed that the product mainly consisted of gamma-TiAl and minor alpha(2)-Ti3Al phases, with Ti, Al, Cr, and Nb homogenously distributed in the powder.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Nanoscience & Nanotechnology
D. Suarez Fernandez, B. P. Wynne, P. Crawforth, M. Jackson
Summary: Titanium alloy components require consideration of heat treatment and changes in billet microstructures for machining performance. Local analysis and microstructure fingerprint plots can be used to evaluate the fluctuations in cutting forces and their correlation with different billet conditions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Jafar Safarian
Summary: The study investigates a duplex process using natural gas to produce ferromanganese and direct reduced iron, which is shown to be more sustainable with about 50% less electric energy consumption and about 40% less CO2 emission compared to the current commercial ferromanganese production process.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Dong Zhao-wang, Xia Yang, Guo Xue-yi, Liu Han-ning, Liu Pei-dong
Summary: This study successfully prepared high-purity Ti-6Al-4V alloy powder through a two-step reduction process and investigated the effect of heat treatment temperature on the morphology and composition uniformity of the powder. The experimental results met the standard specification of Ti-6Al-4V (ASTM F1108-09).
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Materials Science, Multidisciplinary
B. M. Thomas, F. Derguti, M. Jackson
MATERIALS SCIENCE AND TECHNOLOGY
(2017)
Article
Engineering, Industrial
N. S. Weston, M. Jackson
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2017)
Article
Engineering, Industrial
Emma Calvert, Brad Wynne, Nick Weston, Adam Tudball, Martin Jackson
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2018)
Review
Materials Science, Multidisciplinary
N. S. Weston, B. Thomas, M. Jackson
MATERIALS SCIENCE AND TECHNOLOGY
(2019)
Review
Materials Science, Multidisciplinary
Thomas Childerhouse, Martin Jackson
Article
Materials Science, Multidisciplinary
Jacob Pope, Martin Jackson
Editorial Material
Materials Science, Multidisciplinary
Nicholas S. Weston, Martin Jackson
Article
Materials Science, Multidisciplinary
Sarah A. Smythe, Ben M. Thomas, Martin Jackson
Article
Thermodynamics
Armin Salmasi, Simon J. Graham, Iain Galbraith, Alexander D. Graves, Martin Jackson, Susanne Norgren, Dikai Guan, Henrik Larsson, Lars Hoglund
Summary: The study focuses on optimizing the interaction mobility parameters of Ti and Fe in the BCC phase to address segregation issues caused by the addition of Fe to Ti. High-resolution Fe concentration profiles are obtained from Ti-Fe diffusion couples held at different temperatures, and ternary mobility interaction parameters are assessed and compared to previous evaluations.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2021)
Article
Chemistry, Physical
Oliver Levano Blanch, Daniel Suarez Fernandez, Alex Graves, Martin Jackson
Summary: Technological advancements in functionally graded multi-material manufacture have the potential to revolutionize the aerospace industry by providing tailored component design for improved performance. The study evaluated the challenges faced when machining billets consisting of multiple alloys, finding significant differences in machining response and surface damage depending on the alloy pairings and machining direction.
Article
Materials Science, Multidisciplinary
Alex Graves, Oliver Levano Blanch, Daniel Suarez Fernandez, Martin Jackson
Summary: The manufacturing of components with specific material properties in subcomponent regions is highly desired. Diffusion bonding titanium alloy powder using FAST has shown potential, but machining strategy needs to be better understood. This study investigates the drilling machinability of FAST diffusion bonded titanium alloys and highlights the importance of alloy chemistry and bond composition on surface quality and process stability.
Article
Engineering, Mechanical
Thomas Childerhouse, Rachid M'Saoubi, Luiz Franca, Nick Weston, Pete Crawforth, Martin Jackson
Summary: Accurate fatigue life predictions of titanium alloy components requires an understanding of how the machining affected metallurgical and micro-mechanical subsurface condition influences fatigue crack nucleation and growth. This study investigates the influence of surface integrity features generated during carbide and highspeed polycrystalline diamond machining on the fatigue behaviour of coarse and fine-grained Ti-6Al-4V. Mechanically induced compressive residual stresses, promoted by higher feed rates and the larger cutting edge radii of carbide tools, have been demonstrated to provide an overriding enhancing effect on fatigue life due to crack initiation suppression and reducing the deleterious effects of microstructural deformation and surface imperfections.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Mechanical
Thomas Childerhouse, Rachid M'Saoubi, Luiz F. P. Franca, Pete Crawforth, Martin Jackson
Summary: Polycrystalline diamond (PCD) is being developed as a new cutting tool material for titanium alloy machining. The high temperature hardness of PCD can improve productivity by enabling higher cutting speeds. This study examines the performance of different PCD tool grades in milling Ti-54M, and finds that smaller grain size offers better tool life due to superior fracture toughness. The study also compares the surface integrity of PCD and carbide machining, and shows that PCD results in lower microstructural damage and cutting forces.
Article
Chemistry, Multidisciplinary
B. Fernandez Silva, M. Jackson, K. Fox, B. P. Wynne
Summary: Microtexture heterogeneities, known as macrozones, are commonly found in titanium forgings due to thermomechanical processing, leading to reduced resistance to crack propagation. Efforts have been made to define and characterize macrozones, with the development of a computational tool using MATLAB for automatic macrozone identification based on a conservative approach. The tool allows for the detection of macrozones based on disorientation angle and density-fraction criteria, and has been successfully applied to various microstructures of titanium forgings.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2023)
Article
Materials Science, Multidisciplinary
Beatriz Fernandez Silva, Oliver Levano Blanch, Kam Sagoo, Martin Jackson
Summary: Titanium alloys are important for armour designers due to their high ballistic mass efficiency. However, their high cost limits their use in military land-based vehicles. This study investigates the effect of different processing routes on the microstructure, texture, ballistic performance, and deformation modes of Ti-6Al-4V armour plate. The rolled plate exhibited the best performance due to a strong transverse-type texture perpendicular to the projectile direction.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)