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Surface effects and the size-dependent hardening and strengthening of nickel micropillars
(PERGAMON-ELSEVIER SCIENCE LTD, 2012)
We evaluate the extent to which two mechanisms contribute to the observed size effect of the ultimate yield strength of micropillars of diameters in the range of 1-30 mu m: dislocation pile-ups, modeled by means of a ...
Cyclic Deformation and Microstructural Behavior of Reduced Activation Ferritic-Martensitic Steels
(Taylor & Francis, 2014-01)
The present paper presents results about cyclic behaviour and the evolution of the dislocation structure of reduced activation ferritic–martensitic steels and commercial martensitic steels AISI 410 and 420. The variation ...
Microstructure and strengthening mechanisms in an Al-Mg-Si alloy processed by equal channel angular pressing (ECAP)
(Springer London Ltd, 2018-03)
The microstructure, mechanical properties, and strengthening mechanisms of an Al-Mg-Si alloy (AA6060) subjected to severe plastic deformation using equal channel angular pressing (ECAP) were investigated. Samples were ...
Microstructural evolution and mechanical behavior of copper processed by low strain amplitude multi-directional forging
(Elsevier Science SA, 2019-05)
Experiments were performed to analyze the microstructural evolution and mechanical behavior of commercial-purity copper (99.8%) processed by up to 48 cycles of multi-directional forging (MDF) using a low strain amplitude ...
Microstructure evolution during warm deformation of low carbon steel with dispersed cementite
(2007-12-01)
The microstructure evolution and mechanical behavior during large strain of a 0.16%C-Mn steel has been investigated by warm torsion tests. These experiments were carried out at 685°C at equivalent strain rate of 0.1 s . ...
Creation of heterogeneous microstructures in copper using high-pressure torsion to enhance mechanical properties
(Elsevier Science SA, 2019-05)
This paper studies the effects of high-pressure torsion (HPT) at ambient temperature on microstructural evolution and mechanical properties enhancement in pure copper. The aim is to introduce gradient microstructure, with ...
Influence of Strain Amplitude on the Microstructural Evolution and Flow Properties of Copper Processed by Multidirectional Forging
(Wiley VCH Verlag, 2020-04)
Commercial-purity copper (99.8%) is processed by multidirectional forging (MDF) using strain amplitudes per compression (Δε) of 0.15 and 0.30, leading to accumulated strains (ε) of up to ≈10.8. It is shown that increasing ...
Crystalline Quality of CdSe Single Crystalline Commercial Wafer
(Elsevier, 2015-07)
Cadmium selenide is II-VI semiconductor compound with 1.67 eV energy gap (≈ 300 K) and high stopping power for nuclear radiation. Its crystalline structure is hexagonal (wurtzite) and it is used in solar cells, transistors, ...
Application of small punch testing on the mechanical and microstructural characterizations of P91 steel at room temperature
(Elsevier, 2016-06)
The use of small punch test (SPT) has emerged as a potential technique for mechanical characterization using miniaturized specimens. There is a strong interest in applying SPT for life prediction of power plant components ...
Chemical Etching and TEM Crystalline Quality Assessment of Single Crystalline ZnSe Ingots Grown by I2 Vapor Phase Transport
(Cosmos Scholars Publishing House, 2015-12)
Crystalline defects were studied in single crystalline ZnSe grown by chemical transport using I2 as gaseous carrier. Transmission electronic microscopy determined an excellent structural order in the micrometric and ...