Metallurgical and Materials Transactions A OnlineFirst articles

17.04.2024 | Original Research Article

Ultrastrong Low-Alloy Steel with Good Ductility via Multiple Strengthening, Suppressed Carbides and Reversed Austenite in Quenching and Tempering

Two low-alloy quenched-tempered steels (#1 steel and #2 steel) are designed and comparatively studied to achieve ultrahigh yield strength (above 2000 MPa) at relatively low material and process costs. #1 steel and #2 steel have chemical …

verfasst von:: Fan Zhao, Shibo Zhang, Tao Cheng, Lang Su, Zhihao Zhang

16.04.2024 | Original Research Article

Thermal Stability of Nanocrystalline Ag–Cu–Al Alloy Films with Densely Dispersed Alumina Particles Prepared via Reactive Sputtering Using Ar–O2 Mixed Gas

To address the challenges associated with the fabrication of highly O2-permeable Ag membranes suitable for on-site and downsized O2 separators for large-scale industrial applications, we investigated nanocrystalline heat-resistant Ag–Cu–Al alloy …

verfasst von:: Yoshiyuki Ueshima, Masakatsu Hasegawa, Naoyoshi Kubota, Yuya Matamura, Eiichiro Matsubara, Kazuaki Seki, Tetsuji Hirato

16.04.2024 | Brief Communication

Spheroidization of Sulfide in Sulfur Bearing Steels by Oxygen: An Experimental and First-Principle Investigation

The morphology of single-particle manganese sulfide (MnS) in sulfur bearing steel without oxygen is polyhedral, while it is spherical in the steel containing 70 ppm oxygen. Oxygen can dissolve in MnS to form oxysulfide (Mn(S,O)), the dissolution …

verfasst von:: Qianren Tian, Guangjie Song, Songtao Liu, Xiangyu Xu, Jianxun Fu

15.04.2024 | Original Research Article

Unified Transformation Pattern of Hexagonal Transition Metal Hemicarbides and Heminitrides from Their Metal Parents

The solid-state phase transformations from body-centered cubic (bcc) transition metals such as V, Nb, Ta, Cr, Mo, and W to hexagonal close-packed (hcp) transition metal hemicarbides and heminitrides (M2C and M2N) were investigated in this work. It …

verfasst von:: Chao Deng, Lisheng Zhong, Xianhui Wang

Open Access 12.04.2024 | Brief Communication

Directional Solidification of Single-Crystal Blades in Industrial Conditions Using the Developed Gas Cooling Casting Method

The effect of gas cooling on microstructure refinement during the production of single crystal blades by the Developed Gas Cooling Casting (DGCC) method was investigated. Primary dendrite arm spacing (PDAS) reached the highest values in the …

verfasst von:: Dariusz Szeliga, Łukasz Piechowicz, Marcin Lisiewicz, Artur Wiechczyński

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12.04.2024 | Brief Communication

Effect of Crystallographic Orientation on the Formation of α-Case in Ti-6Al-4V Titanium Alloy

The α-casing is a well-known phenomenon during the heat treatment of Ti-6Al-4V alloys. This work investigates the role of crystallographic orientation on α-case thickness. Specimens were heat-treated below the β-transus temperature followed by air …

verfasst von:: Suravi Sarkar, Anish Ranjan, Sushil K. Mishra

Open Access 11.04.2024 | Brief Communication

An Improved Model for Molar Volumes of Ti-Carbide, Ti-Nitride and Ti-Carbo-Nitride

Molar volume of titanium carbonitride is modelled as function of composition and temperature by two-sublattice model Ti1(C, N, Va)1. Deviations from the ideal solution model in Ti–TiX sections were modelled by regular solution model between X …

verfasst von:: Huaqing Zhang, Yong Du, George Kaptay

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10.04.2024 | Brief Communication

A Novel Approach to Improve Conductivity of 1XXX Al Alloy by In Situ Synthesis of Al–X-B Grain Refiner

verfasst von:: Yi Feng Li, Jian Qin, Jia Min Yu, Yu Liu, Zhen Li, Hiromi Nagaumi, Bo Zhang

Open Access 09.04.2024 | Original Research Article

Achieving a Columnar-to-Equiaxed Transition Through Dendrite Twinning in High Deposition Rate Additively Manufactured Titanium Alloys

The coarse β-grain structures typically found in titanium alloys like Ti–6Al–4V (wt pct, Ti64) and Ti–6Al–2Sn–4Zr–2Mo–0.1Si (Ti6242), produced by high deposition rate additive manufacturing (AM) processes, are detrimental to mechanical …

verfasst von:: A. E. Davis, J. Wainwright, V. K. Sahu, D. Dreelan, X. Chen, J. Ding, T. Flint, S. Williams, P. B. Prangnell

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Open Access 08.04.2024 | Brief Communication

Influence of Cooling Rate After Destabilization on Microstructure and Hardness of a High-Cr Cast Iron

This study investigates the impact of cooling rate after destabilization at 980 °C on the microstructure of 23 wt pct Cr–2.7wt pct C hypoeutectic high-Cr cast iron. Lowering cooling rate intensifies the secondary carbides formation, depleting …

verfasst von:: Charline Le Nué, Santiago Corujeira Gallo, Alireza Vahid, Mehdi Taherishargh, Hooyar Attar, Daniel Fabijanic, Matthew Barnett

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05.04.2024 | Original Research Article

A Data-Driven Approach for the Fast Prediction of Macrosegregation

Macrosegregation is of great importance to study due to its negative impact on the quality of casting. Although numerical models can predict macrosegregation during alloy solidification, solving the partial differential equations is rather …

verfasst von:: Xiaowei Xu, Neng Ren, Ziqing Lu, Wajira Mirihanage, Eric Tsang, Alex Po Leung, Jun Li, Mingxu Xia, Hongbiao Dong, Jianguo Li

05.04.2024 | Original Research Article

Opposite Bauschinger Effects on Wear of High-Entropy Alloy AlCoCrFeNix (x = 0 to 2) Under Sliding Wear and Machining Conditions

Bauschinger effect on wear of high-entropy alloy (HEA), AlCoCrFeNix (x = 0 to 2), was studied with the aim of verifying a hypothesis: Bauschinger effect affects sliding wear and machining wear oppositely. Wear tests were performed with two …

verfasst von:: Z. Xu, Y. Q. Tang, A. Q. He, W. G. Chen, D. L. Chen, D. Y. Li

04.04.2024 | Original Research Article

Deformation of Aluminum Investigated by Digital Image Correlation: Evidence of Simultaneous Crystal Slip and Grain Boundary Sliding

We investigate the multiscale micromechanical behavior of nearly pure polycrystalline aluminum exhibiting randomly oriented coarse grains (ca. 300 μm in size) between room temperature and 400 °C. We present the results from in situ mechanical …

verfasst von:: A. Dimanov, A. El Sabbagh, J. Raphanel, M. Bornert, L. Thien-Nga, S. Hallais, A. Tanguy

04.04.2024 | Original Research Article

Structure–Property Relations in Pb-Supersaturated Metastable Sn-Rich Pb-Sn Alloys

We have performed a theoretical study of three polymorphs of Pb-supersaturated Sn-rich Pb-Sn alloys with the $$\alpha $$ α -Sn, $$\beta $$ β -Sn, and a simple-hexagonal $$\gamma $$ γ -Sn structure employing quantum-mechanical calculations. We …

verfasst von:: Martin Friák, Petr Čípek, Jana Pavlů, Ondřej Zobač, Pavla Roupcová, Ivana Miháliková, David Holec, Šárka Msallamová, Alena Michalcová

04.04.2024 | Original Research Article

High Temperature B2 Precipitation in Ru-Containing Refractory Multi-principal Element Alloys

Ru-based B2 phases present an opportunity to design two-phase BCC + B2 refractory multi-principal element alloys (RMPEAs) with higher temperature stability compared to B2 phases observed in RMPEAs. In this investigation, seven equiatomic …

verfasst von:: Carolina Frey, Haojun You, Sebastian Kube, Glenn H. Balbus, Kaitlyn Mullin, Scott Oppenheimer, Collin S. Holgate, Tresa M. Pollock

02.04.2024 | Brief Communication

The Constant-Stress, Constant-Heating-Rate Behavior of an Additively Manufactured ODS Superalloy

The creep behavior of the oxide-dispersion-strengthened alloy GRX-810 fabricated by powder coating followed by laser-powder-bed fusion was evaluated via constant-stress, constant-heating-rate (CSCHR) tension testing using stresses of 69, 97, 121 …

verfasst von:: S. L. Semiatin, N. C. Levkulich, A. M. Faith, T. M. Smith, T. M. Butler

01.04.2024 | Original Research Article

Mg–Ca Surgical Wires Degradation in Animal Serum

The degradation of Mg–Ca alloys designed for veterinary applications (hard tissue bonding) obtained by the hot and cold plastic deformation process was investigated. Weight loss and electrochemical tests were carried out on wires with various …

verfasst von:: Urszula Lelek-Borkowska, Mirosław Wróbel, Mateusz Marzec, Piotr Kustra, Andrij Milenin

01.04.2024 | Original Research Article

On Evaluation of the Gibbs–Thomson Effect and Selection of Nucleus Size for the Kampmann–Wagner Numerical Model

For the Kampmann–Wagner numerical (KWN) model, to accurately describe the microstructure evolution in a solid-state precipitation reaction requires a good evaluation of the Gibbs–Thomson effect and an appropriate nucleus size to be used. In the …

verfasst von:: Qing-Liang Wang, Hao-Ran Liu

31.03.2024 | Original Research Article

Improving Tensile Properties of Dissimilar TLP Bonding Joints of IN718 Nickel-Based Superalloy/316LN Austenitic Steel by Long-Term Post-bonded Homogenization Treatment

The presence of boride precipitates has a detrimental impact on the mechanical properties of TLP bonding joints. This study investigated the effectiveness of the long-term post-bonded homogenization treatment (PBHT) in mitigating the adverse …

verfasst von:: Miao Yang, Bo Zhang, Ran Ding, Qianying Guo, Chenxi Liu, Yongchang Liu

31.03.2024 | Correction

Correction: Deformation-Induced Planar Defects in Immm Ni2(Cr, Mo, W) Strengthened HAYNES® 244® Superalloy

verfasst von:: T. R. Mann, M. G. Fahrmann, M. S. Titus

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