Results 41 to 50 of about 2,183,502 (251)

STARCH SYNTHASE 4 is required for normal starch granule initiation in amyloplasts of wheat endosperm

open access: yesbioRxiv, 2021
Starch granule initiation is poorly understood at the molecular level. The glucosyltransferase, STARCH SYNTHASE 4 (SS4), plays a central role in granule initiation in Arabidopsis leaves, but its function in cereal endosperms is unknown.
Erica Hawkins   +8 more
semanticscholar   +1 more source

Very high cycle fatigue of copper: Evolution, morphology and locations of surface slip markings [PDF]

open access: yes, 2014
The surfaces of commercially pure polycrystalline copper specimens subjected to interrupted 20 kHz fatigue tests in the very high cycle fatigue regime were investigated.
FAVIER, Véronique   +4 more
core   +4 more sources

Effect of crystallographic properties on low cycle fatigue crack initiation at elevated temperature for Ni-based directionally solidified superalloy

open access: yesNihon Kikai Gakkai ronbunshu, 2016
Low cycle fatigue tests at elevated temperature were conducted on a Ni-based directionally solidified superalloy subjected to transverse loading. To investigate the effect of the arrangement and the orientation of crystal grains on the crack initiation ...
Takashi YOKOYAMA, Masaru SEKIHARA
doaj   +1 more source

A multiscale constitutive model for intergranular stress corrosion cracking in type 304 austenitic stainless steel [PDF]

open access: yes, 2013
Intergranular stress corrosion cracking (IGSCC) is a fracture mechanism in sensitised austenitic stainless steels exposed to critical environments where the intergranular cracks extends along the network of connected susceptible grain boundaries.
Rahimi, S, Siddiq, A
core   +2 more sources

Strain Hardening of Low-Carbon Steel in the Area of Jerky Flow

open access: yesNauka ta progres transportu, 2021
Purpose. The aim of this work is to assess the effect of ferrite grain size of low-carbon steel on the development of strain hardening processes in the area of nucleation and propagation of deformation bands. Methodology.
I. O. Vakulenko   +6 more
doaj   +1 more source

Effect of crystallographic properties on low cycle fatigue crack initiation at elevated temperature for Ni-based directionally solidified superalloy with small holes

open access: yesNihon Kikai Gakkai ronbunshu, 2016
Low cycle fatigue tests at elevated temperature were conducted on a Ni-based directionally solidified superalloy with small holes subjected to transverse loading.
Takashi YOKOYAMA, Masaru SEKIHARA
doaj   +1 more source

Characteristic and mechanism of crack initiation and early growth of an additively manufactured Ti-6Al-4V in very high cycle fatigue regime

open access: yes, 2021
In this paper, very high cycle fatigue (VHCF) behavior of an additively manufactured (AM) Ti-6Al-4V by selective laser melting process and post-heat treated by hot-isostatic pressing is investigated by ultrasonic frequency fatigue test and rotating ...
Chengqi Sun   +3 more
semanticscholar   +1 more source

Service damage mechanism and performance attenuation of nickel-based alloy turbine blades

open access: yesJournal of Aeronautical Materials, 2021
Multi-scale morphology observations and fatigue performance tests were carried out to study the damage evolution mechanism and fatigue performance attenuation behavior of K403 turbine blades in service.
CHEN Cao, HAN Lei, ZHANG Yu, YAN Xiaojun
doaj   +1 more source

Grain boundary plasticity initiated by excess volume

open access: yesProceedings of the National Academy of Sciences
Grain boundaries (GBs) serve not only as strong barriers to dislocation motion, but also as important carriers to accommodate plastic deformation in crystalline solids. During deformation, the inherent excess volume associated with loose atomic packing in GBs brings about a microscopic degree of freedom that can initiate GB plasticity, which is beyond ...
Qi Zhu   +9 more
openaire   +2 more sources

Crystal plasticity simulation of the effect of grain size on the fatigue behavior of polycrystalline Inconel 718

open access: yes, 2018
A microstructure-based model that accounts for the effect of grain size has been developed to study the effect of grain size on the fatigue life of Inconel 718 alloys.
Cruzado, A.   +3 more
core   +1 more source

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