Browsing Pokročilé kovové materiály a kompozity na bázi kovů by Title
Now showing items 1-10 of 10
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Crack onset assessment near the sharp material inclusion tip by means of modified maximum tangential stress criterion
(Gruppo Italiano Frattura, 2017-10-01)In the case of particle reinforced composites, where the particles are in a form of sharp material inclusions, singular stress concentration exists on each tip of each inclusion. This is due to the geometric and material ... -
Effects of microstructure and crystallography on crack path and intrinsic resistance to shear-mode fatigue crack growth
(Italian Group of Fracture, 2015-09-16)The paper focuses on the effective resistance and the near-threshold growth mechanisms in the ferritic-pearlitic and the pure pearlitic steel. The influence of microstructure on the shear-mode fatigue crack growth is divided ... -
Fatigue Life of 7475-T7351 Aluminum After Local Severe Plastic Deformation Caused by Machining
(MPDI, 2019-11-03)The fatigue properties of thermo-mechanically treated and machined aluminum alloy 7475-T7351 have been studied. The applied advanced machining strategy induced intensive plastic deformation on the machined surface under ... -
Initiation of fatigue cracks in AZ91 Mg alloy processed by ECAP
(IOP Publishing, 2014-08-08)Mechanism of fatigue crack initiation was investigated in ultrafine-grained (UFG) magnesium alloy AZ91 processed by equal channel angular pressing (ECAP). Fatigue behaviour of UFG material was compared to the behaviour of ... -
Microcrack interaction with circular inclusion and interfacial zone
(Gruppo Italiano Frattura, 2019-01-04)A geometrically simplified plane elasticity problem of a finitesmall crack emanating from a thin interfacial zone surrounding the circularinclusion situated in the finite bounded domain is investigated. The crack isarbitrarily ... -
Near threshold fatigue crack growth in ultrafinegrained copper
(IOP Publishing, 2014-08-08)The near threshold fatigue crack growth in ultrafine-grained (UFG) copper at room temperature was studied in comparison to conventional coarse-grained (CG) copper. The fatigue crack growth rates da/dN in UFG copper were ... -
On the connection between mode II and mode III effective thresholds in metals
(Italian Group of Fracture, 2017-07-01)Closure-free long cracks under the remote mode III loading grow in a more complicated way than those under the remote mode II. For bcc metals, a coplanar in-plane spreading of tongues driven by the local mode II loading ... -
Simple criterion for predicting fatigue life under combined bending and torsion loading
(Gruppo Italiano Frattura, 2017-07-01)Multiaxial fatigue is a challenging problem and, consequently, a number of methods has been developed to aid in design of components and assemblies. Following the complexity of the problem, these approaches are often ... -
Strength and Brittleness of Interfaces in Fe-Al Superalloy Nanocomposites under Multiaxial Loading: An ab initio and Atomistic Study
(MDPI, 2018-10-24)We present an ab initio and atomistic study of the stress-strain response and elastic stability of the ordered Fe3Al compound with the D03 structure and a disordered Fe-Al solid solution with 18.75 at.% Al as well as of a ... -
Stress coupling effect on ideal shear strength: tungsten as a case study
(Hindawi, 2016-12-05)Mechanical response of a perfect bcc tungsten crystal to a multiaxial loading was investigated from first principles. The multiaxial stress state consisted of the shear stress and a superimposed compressive triaxial stress ...