Superplasticity in Ultrafine-Grained Materials. [PDF]
Reviews on Advanced Materials Science, 2018 Superplasticity refers to the ability of a polycrystalline solid to exhibit a high elongation, of at least 400% or more, when testing in tension. The basic characteristics of superplastic flow are now understood and a theoretical model is available to ...
Kawasaki Megumi, Langdon Terence G.
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Annealing‐Induced Hardening in Ultrafine‐Grained and Nanocrystalline Materials [PDF]
Advanced Engineering Materials, 2019 Annealing of deformed metals is considered as a process necessarily leading to softening due to the annihilation of lattice defects. However, in ultrafine‐grained (UFG) and nanocrystalline materials, annealing at moderate temperatures may induce ...
Jenõ Gubicza
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Ultrafine-Grained Stainless Steels after Severe Plastic Deformation
Metals, 2023 The aim of the present review is to summarize the recent achievements in the development of ultrafine-grained austenitic/ferritic stainless steels processed by large strain deformation.
Pavel Dolzhenko +4 more
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MATEC Web of Conferences, 2015 Materials with ultrafine grain sizes are attractive for use in micro-forming operations. High-pressure torsion (HPT) is an effective technique that allows disc materials subjected to torsional deformation to generate microstructures with significant ...
Huang Yi, Xu Jie, Langdon Terence G.
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Fracture Kinetics and Mechanisms of Ultrafine-Grained Materials during Fatigue Tests in the Low-Cycle Fatigue Region [PDF]
Metals, 2023 In this paper, the fracture kinetics and mechanisms in the low-cycle fatigue region were analyzed for different ultrafine-grained (UFG) materials with body-centered cubic (bcc), hexagonal close-packed (hcp) and face-centered cubic (fcc) lattices.
Gennadiy V. Klevtsov +5 more
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Influence of grain size on the solid-state direct reduction of polycrystalline iron oxide [PDF]
Communications MaterialsDirect reduction of iron oxide using hydrogen offers a sustainable route to lower carbon emissions in steelmaking. Although iron oxide feedstocks consist of polycrystalline pellets, the influence of initial hematite grain size on direct reduction remains
Barak Ratzker +4 more
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Mechanical behavior of ultrafine-grained materials under combined static and dynamic loadings [PDF]
EPJ Web of Conferences, 2015 Ultrafine-grained (UFG) materials have extensive prospects for engineering application due to their excellent mechanical properties. However, the grain size decrease reduces their strain hardening ability and makes UFG materials more susceptible to ...
Guo Y.Z. +4 more
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Evaluating the flow processes in ultrafine-grained materials at elevated temperatures [PDF]
Materials Research, 2013 When polycrystalline materials are tested in tension at elevated temperatures, the flow mechanisms depend upon various parameters including the temperature of testing, the applied stress and the material grain size.
Megumi Kawasaki, Terence G. Langdon
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Ultrafine‐Grained Materials With Antibacterial Properties: A Novel Approach to Reducing Spinal Implant‐Associated Infections [PDF]
JOR SpineBackground Implant‐associated infection remains a serious complication of instrumented spinal surgery. Since biofilm formation on the implant surface is a key factor in the pathogenesis of such infections, current preventive strategies include the use of
Mitsuhiro Nishizawa +5 more
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Ultrahigh Strength and Exceptional Work Hardening in a Hierarchical‐Structured Alloy via Hetero‐Interface‐Mediated Twinning [PDF]
Advanced ScienceYield strength and work hardening are two critical mechanical properties of metallic structural materials. However, increasing yield strength through conventional strengthening mechanisms often restricts further dislocation multiplications and ...
Yitong Yang +9 more
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