TY - JOUR

T1 - Full-scale use of X-ray scattering techniques to characterize aged Al-2wt.%Cu alloy

AU - Sitdikov, V. D.

AU - Yu Murashkin, M.

AU - Valiev, R. Z.

PY - 2018/2/25

Y1 - 2018/2/25

N2 - In this work X-ray scattering techniques are used in full scale to characterize the microstructure of Al-2wt.%Cu alloy in order to state common and diverse features between artificial and dynamic ageing. Artificial ageing of the alloy is implemented via T6 regime, dynamic ageing occurs during high pressure torsion. X-ray phase analysis of diffraction patterns obtained in the transmission regime has for the first time identified and quantified the nanodisperse phases of precipitates in the both aged states. Lattice parameters, coherent scattering domains distribution over sizes, averaged dislocation density, fractions of edge and screw dislocations of Al phase after artificial and dynamic ageing are determined via the diffraction patterns obtained in the reflection regime. Small angle X-ray scattering (SAXS) technique has established quantitative characteristics of size, shape and distribution of precipitates in the mentioned states. In order to confirm the results of SAXS, transmission electron microscopy studies are performed on the same foils. Peculiarities of mechanisms of artificial and dynamic ageing in the studied alloy are discussed on the basis of the obtained data.

AB - In this work X-ray scattering techniques are used in full scale to characterize the microstructure of Al-2wt.%Cu alloy in order to state common and diverse features between artificial and dynamic ageing. Artificial ageing of the alloy is implemented via T6 regime, dynamic ageing occurs during high pressure torsion. X-ray phase analysis of diffraction patterns obtained in the transmission regime has for the first time identified and quantified the nanodisperse phases of precipitates in the both aged states. Lattice parameters, coherent scattering domains distribution over sizes, averaged dislocation density, fractions of edge and screw dislocations of Al phase after artificial and dynamic ageing are determined via the diffraction patterns obtained in the reflection regime. Small angle X-ray scattering (SAXS) technique has established quantitative characteristics of size, shape and distribution of precipitates in the mentioned states. In order to confirm the results of SAXS, transmission electron microscopy studies are performed on the same foils. Peculiarities of mechanisms of artificial and dynamic ageing in the studied alloy are discussed on the basis of the obtained data.

KW - Al-2wt.%Cu alloy

KW - Dynamic ageing

KW - High pressure torsion

KW - Precipitation

KW - X-ray diffraction

KW - DISLOCATIONS

KW - MG ALLOYS

KW - BEHAVIOR

KW - MECHANISMS

KW - SEGREGATION

KW - AL-CU ALLOYS

KW - PRECIPITATION

KW - SEVERE PLASTIC-DEFORMATION

KW - 1ST-PRINCIPLES CALCULATIONS

KW - DIFFUSION

UR - http://www.scopus.com/inward/record.url?scp=85036567584&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2017.11.282

DO - 10.1016/j.jallcom.2017.11.282

M3 - Article

AN - SCOPUS:85036567584

VL - 735

SP - 1792

EP - 1798

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -