Results 1 to 10 of about 51,708 (269)

Chondrodysplasias With Multiple Dislocations Caused by Defects in Glycosaminoglycan Synthesis

open access: yesFrontiers in Genetics, 2021
Chondrodysplasias with multiple dislocations form a group of severe disorders characterized by joint laxity and multiple dislocations, severe short stature of pre- and post-natal onset, hand anomalies, and/or vertebral anomalies.
Johanne Dubail   +2 more
doaj   +1 more source

The Dislocation Mechanics of Crystal/Polycrystal Plasticity

open access: yesCrystals, 2022
A brief history and update are given in four examples demonstrating that polycrystals are generally stronger than their individual component crystal grains because of obstructed dislocation pile-ups at grain boundaries.
Ronald W. Armstrong
doaj   +1 more source

Effect of Flux Rate Variation at Fixed V/III Ratio on Semi-Polar (112¯2) GaN: Crystal Quality and Surface Morphology Study

open access: yesCrystals, 2022
We report on the crystal improvement of semi-polar (112¯2) gallium nitride epitaxy layer on m-plane (101¯0) sapphire substrate by changing the flux rate at a fixed V/III ratio.
Chong Seng Ooi   +4 more
doaj   +1 more source

Mathematical Modeling of Heating and Strain Aging of Steel during High-Speed Wire Drawing

open access: yesMetals, 2022
In this article, a mathematical model of the wire’s average temperature change in the process of multiple drawing on high-speed straight-line drawing machines has been developed.
Liudmila V. Radionova   +8 more
doaj   +1 more source

The Influence of Precipitation Hardening on the Damping Capacity in Al–Si–Mg Cast Components at Different Strain Amplitudes

open access: yesMetals, 2022
An A356 alloy is a classic casting light alloy, which is able to be processed into complex geometrical shapes with tailored static and dynamic mechanical properties. As a promising material to reduce fuel and energy consumption in future vehicle designs,
Vitor H. Carneiro   +4 more
doaj   +1 more source

Modeling and simulation of dynamic recrystallization for Mg/LPSO alloys based on multi-phase-field and dislocation-based crystal plasticity models

open access: yesNihon Kikai Gakkai ronbunshu, 2020
A dual-phase magnesium alloy consisting of the usual α-Mg phase and a new LPSO (Long-Period Stacking Ordered Structure) phase has been developed and expected for a next-generation structural material owing to its excellent mechanical properties.
Sho KUJIRAI, Kazuyuki SHIZAWA
doaj   +1 more source

The Effect of Deformation Temperature on the Yield Stress of Ultrafine-Grained Al-Cu-Zr Alloy Containing Grain Boundary Nanoprecipitates

open access: yesMetals, 2023
A theoretical model is suggested that describes the effect of deformation temperature on the yield stress of an ultrafine-grained (UFG) Al-Cu-Zr alloy structured with severe plastic deformation.
Mikhail Yu. Gutkin   +2 more
doaj   +1 more source

Effect of nanoscale defects on inelastic processes in aged alloys

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2023
The high strain rate deformation of an aged alloy with a high concentration of Guinier-Preston zones is theoretically analyzed. The analysis was carried out within the framework of the theory of dynamic interaction of defects.
V.V. Malashenko, T.I. Malashenko
doaj   +1 more source

Dislocation and fracture-dislocation of the hip [PDF]

open access: yesThe Journal of Bone and Joint Surgery. British volume, 1991
Of 54 patients with posterior dislocations of the hip of type I and type II (Stewart and Milford 1954), 47 were followed for a mean period of 6.7 years (2 to 11). Of these, 23 had dislocation with minimal lesions of the acetabulum (type I) and 24 had an avulsed dorsocranial fragment (type II). All were reduced by closed methods within six hours.
R A, Jaskulka, G, Fischer, G, Fenzl
openaire   +2 more sources

Microstructure and Texture Evolution of a Dynamic Compressed Medium-Entropy CoCr0.4NiSi0.3 Alloy

open access: yesCrystals, 2023
Focal research has been conducted on medium-entropy alloys (MEAs) that exhibit a balanced combination of strength and plasticity. In this study, the microstructure, dynamic mechanical properties, and texture evolution of an as-cast medium-entropy CoCr0 ...
Li Zhang   +6 more
doaj   +1 more source

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