Results 41 to 50 of about 252,373 (307)
Ductile-to-Brittle Transition and Brittle Fracture Stress of Ultrafine-Grained Low-Carbon Steel
Materials, 2021 Ductile-to-brittle transition (DBT) temperature and brittle fracture stress, σF, are important toughness criteria for structural materials. In this paper, low-carbon steels with an ultrafine elongated grain (UFEG) structure (transverse grain size 1.2 μm)
Tadanobu Inoue +3 more
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Synthesis and Properties of Bulk Nanostructured Metallic Materials
Metals, 2018 Bulk nanostructured materials (BNMs) are defined as polycrystalline bulk solids with nanocrystalline (NC) or ultrafine-grained (UFG) microstructures. [...]
Byungmin Ahn
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, 2021 Ultrafine-grained materials display almost no strain hardening, an enhanced strain rate sensitivity and grain boundary offsets during plastic deformation. It is expected that dislocation climb is active in order to enable prompt recovery.
R. Figueiredo, T. Langdon
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Materials, 2021 The paper presents the microstructural investigation of a friction-welded joint made of 316L stainless steel with an ultrafine-grained structure obtained by hydrostatic extrusion (HE). Such a plastically deformed material is characterized by a metastable
Beata Skowrońska +4 more
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Metals, 2015 Ultrafine-grained (UFG) metallic materials are at the cutting edge of modern materials science as they exhibit outstanding properties which make them very interesting for prospective structural or functional engineering applications. [...]
Heinz Werner Höppel
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Materials Research Letters, 2021 Ultrafine-grained and nanocrystalline materials frequently show an enhanced rate sensitivity of their mechanical behavior, which is generally assumed to be the consequence of interface sliding or thermally activated dislocation processes at the ...
Patrick Feldner +2 more
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Fracture toughness of materials with ultrafine grained structure [PDF]
Letters on Materials, 2013 E. E. Derugin +2 more
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Zjemňování zrna protlačované hořčíkové slitiny AZ31 procesem Ecap [PDF]
, 2017 Extruded Mg – 3%Al – 1% Zn (AZ31) magnesium alloy was subjected to ECAP (Equal Channel Angular Pressing) processing at 523 K (250 °C). At the processing temperature of 523 K, fine grains with the average grain size of 2 – 3 μm are formed as a result of ...
Hilšer, Ondřej +3 more
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Deformation-softening in ultrafine-grained materials
IOP Conference Series: Materials Science and Engineering, 2020 Abstract Plastic deformation is conventionally considered as a route for strengthening of metallic materials. During plastic straining, different crystal defects, such as dislocations, stacking faults and grain boundaries form, hardening the material. On the other hand, plastic deformation may also cause unexpected softening in ultrafine-
Jenö Gubicza, Nguyen Quang Chinh
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Micro-deformation behavior in micro-compression with high-purity aluminum processed by ECAP
Manufacturing Review, 2015 Ultrafine-grained (UFG) materials have a potential for applications in micro-forming since grain size appears to be the dominant factor which determines the limiting size of the geometrical features.
Xu Jie +4 more
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