Journal ArticleDOI
First-principles study of crystal structure and stability of Al-Mg-Si-(Cu) precipitates
C. Ravi,C. Ravi,Chris Wolverton +2 more
TLDR
In this paper, an extensive, systematic first-principles study of the thermodynamics of all the reported precipitate phases of Mg-Si-Cu alloys was performed using density functional-based calculations in both the local density and generalized gradient approximations.About:
This article is published in Acta Materialia.The article was published on 2004-08-16. It has received 306 citations till now. The article focuses on the topics: Precipitation (chemistry).read more
Citations
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Mechanisms controlling the artificial aging of Al-Mg-Si Alloys
TL;DR: In this article, the artificial aging behavior of AA 6061 was investigated in the temperature range 150-250°C using atom probe tomography, hardness and resistivity measurements for various thermal histories, and it was found that the precipitation kinetics and age-hardening response of artificial aging at temperatures below 210°C are lowered by prior natural aging but enhanced above this temperature.
Journal ArticleDOI
Atomic pillar-based nanoprecipitates strengthen AlMgSi alloys.
TL;DR: This study explains the nanoscopic reasons that the AlMgSi alloys make excellent automotive materials, and shows that they undergo a one-dimensional growth in association with compositional change, becoming elongated particles.
Journal ArticleDOI
Recent Advances in Friction Stir Welding/Processing of Aluminum Alloys: Microstructural Evolution and Mechanical Properties
TL;DR: Friction stir welding (FSW) has been termed as green technology due to its energy efficiency and environment friendliness as mentioned in this paper, which is an enabling technology for joining metallic materials, in particular lightweight high-strength aluminum and magnesium alloys.
Journal ArticleDOI
First-principles calculation of structural energetics of Al-TM (TM = Ti, Zr, Hf) intermetallics
Gautam Ghosh,Mark Asta +1 more
TL;DR: In this article, the total energies and equilibrium cohesive properties of 69 intermetallics in the Al-TM (TM = Ti, Zr and Hf) systems are calculated from first-principles employing electronic density-functional theory, ultrasoft pseudopotentials and the generalized gradient approximation.
Journal ArticleDOI
Effects of heat treatments on the microstructure and mechanical properties of a 6061 aluminium alloy
TL;DR: In this paper, the mechanical behavior of the 6061-T6 aluminium alloy at room temperature for various previous thermal histories representative of an electron beam welding was described, and a fast-heating device was designed to control and apply thermal loadings on tensile specimens.
References
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Journal ArticleDOI
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.
Georg Kresse,Jürgen Furthmüller +1 more
TL;DR: An efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set is presented and the application of Pulay's DIIS method to the iterative diagonalization of large matrices will be discussed.
Journal ArticleDOI
Special points for brillouin-zone integrations
Hendrik J. Monkhorst,J.D. Pack +1 more
TL;DR: In this article, a method for generating sets of special points in the Brillouin zone which provides an efficient means of integrating periodic functions of the wave vector is given, where the integration can be over the entire zone or over specified portions thereof.
Journal ArticleDOI
Ab initio molecular dynamics for liquid metals.
Georg Kresse,Jürgen Hafner +1 more
TL;DR: In this paper, the authors present an ab initio quantum-mechanical molecular-dynamics calculations based on the calculation of the electronic ground state and of the Hellmann-Feynman forces in the local density approximation.
Book
Introduction to solid state physics
TL;DR: In this paper, the Hartree-Fock Approximation of many-body techniques and the Electron Gas Polarons and Electron-phonon Interaction are discussed.