Results 31 to 40 of about 518 (155)

Multi-level model describing phase transformations of polycrystalline materials under thermo-mechanical impacts

Fracture and Structural Integrity, 2019
The problem of constructing the multilevel physical model of inelastic deformation in steels allowing to take into consideration diffusionless solid-state phase (martensitic) transitions is considered.
Nikita Sergeevich Kondratev, Peter Valentinovich Trusov, Elena Sergeevna Makarevich   +2 more
doaj   +3 more sources

Composition of ω-Phase Particles in Ti(Mo) Alloys Studied by Anomalous X-ray Diffraction

Crystals, 2019
Nanoparticles of hexagonal ω phase in bcc-Ti(Mo) single crystals ( β phase) occur due to a diffusionless athermal β to ω transformation and they grow during follow-up ageing at elevated temperatures, while the ...
Jana Šmilauerová, Petr Harcuba, Miloš Janeček, Václav Holý   +3 more
doaj   +1 more source

Harnessing Bifunctional Nitrogen-Dislocation Interactions for a Record Ultra-Strong-and-Ductile Duplex Titanium Alloy. [PDF]

Adv Sci (Weinh)
By engineering bifunctional nitrogen‐dislocation interactions, this work constructs a heterogeneous lamellar structure with N‐rich low‐angle boundaries and coherent nanotwinned martensites, enabling ultrahigh yield/tensile strength (1532/1869 MPa) and activating massive dislocations via stress‐driven bow‐out/cross‐slip.
Zhang C, Li X, Li S, Zhang J, Liu G, Sun J.   +5 more
europepmc   +2 more sources

Effect of Ultra-Fast Heat Treatment on the Subsequent Formation of Mixed Martensitic/Bainitic Microstructure with Carbides in a CrMo Medium Carbon Steel

Metals, 2019
The current work focuses on complex multiphase microstructures gained in CrMo medium carbon steel after ultra-fast heat treatment, consisting of heating with heating rate of 300 °C/s, 2 s soaking at peak temperature and subsequent quenching. In order
Spyros Papaefthymiou, Alexandros Banis, Marianthi Bouzouni, Roumen H. Petrov   +3 more
doaj   +1 more source

Displacive In‐Plane Ferroelectricity with Domain‐Specific Curie Temperature in Van der Waals Semiconductors

Advanced Science, EarlyView.
Temperature‐dependent electron diffraction on tin monochalcogenides demonstrates a gradual displacive transformation between ferroelectric and paraelectric phases with significant variability in lattice constants and Curie temperature (TC). Periodic variations exist even between domains in individual crystals, implying a domain‐specific Curie ...
Peter Sutter, Eli Sutter
wiley   +1 more source

Thermohydrogen‐Induced α→β Phase Transition and Interfacial Aggregation: A Diffusion Bonding Mechanism for Ti65 Alloy at Low Temperatures

Rare Metals, EarlyView.
ABSTRACT Diffusion bonding (DB) of near‐α titanium alloys requires high temperatures, which can cause grain coarsening, structural deformations, and degradation of the workpiece's mechanical characteristics. In this study, thermal hydrogen processing (THP) was applied to Ti65, combined with selective magnetron sputtering of a Ti‐Al thin film to promote
Liang‐Wei Kang, Shao‐Song Jiang, Jin‐Yuan Zhang, Yang Li, Xin‐Yue Shi, Cheng‐Qian Huang, Peng Peng, Shang Yang, Zheng Han, Zhen Lu   +9 more
wiley   +1 more source

Recycling End‐of‐Life Solid Oxide Cell Interconnect Assemblies into Commercial‐Grade AISI 304 Stainless Steels

steel research international, EarlyView.
This study validates a recycling pathway for converting interconnect assemblies from end‐of‐life SOC stacks into commercial‐grade AISI 304 steels. Using scrap‐based steelmaking operations, austenitic cast steels with <4.0% δ‐ferrite are successfully produced.
Jeraldine Lastam, Shine‐Od Mongoljiibuu, Alexander Specht, Daniel Grüner, Dmitry Sergeev, Urs A. Peuker, Michael Müller, Ruth Schwaiger   +7 more
wiley   +1 more source

High Pressure Formation of the Eight‐Fold Coordinated Post‐Post Spinel MgFe2O4

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract MgFe2O4 was probed to 74(1) GPa and 2,840(130) K as a low‐pressure analog to post‐post spinel Mg2SiO4 predicted in super‐Earths using synchrotron multigrain X‐ray diffraction techniques in the laser‐heated diamond anvil cell. With high‐temperatures above 65 GPa the eight‐fold coordinated δ‐MgFe2O4 (Th3P4‐type) is stable with Mg and Fe ...
Claire C. Zurkowski, Jing Yang, Stella Chariton, Vitali Prakapenka, Yingwei Fei   +4 more
wiley   +1 more source

Constitutive modeling of the slip-twinning transition in martensitic transformations

Journal of Materials Research and Technology
Martensite is the result of a diffusionless displacive phase transition. In Fe-based alloys it transforms the FCC to the BCC, BCT, or HCP structures and occurs at high strain rates. It has two typical morphologies, known as lath and plate. A quantitative
Sheron Stephany Tavares, Marc André Meyers   +1 more
doaj   +1 more source

Heat Capacity Measurements and Thermodynamic Assessment of the Y2O3–Ta2O5 System

Journal of the American Ceramic Society, Volume 109, Issue 2, February 2026.
ABSTRACT Phase equilibria in the Y2O3–Ta2O5 system play an important role in the development of new materials for thermal barrier coating (TBC) applications, with higher thermal stability resulting in more efficient gas turbines with reduced exhaust gas emissions.
M. Löffler, D. A. de Abreu, A. Habermann, M. Lepple, O. Fabrichnaya   +4 more
wiley   +1 more source