Search results for " aluminium alloys"

showing 2 items of 2 documents

Density functional theory based screening of ternary alkali-transition metal borohydrides: a computational material design project.

2009

We present a computational screening study of ternary metal borohydrides for reversible hydrogen storage based on density functional theory. We investigate the stability and decomposition of alloys containing 1 alkali metal atom, Li, Na, or K M1; and 1 alkali, alkaline earth or 3d / 4d transition metal atom M2 plus two to five BH4  groups, i.e., M1M2BH42‐5, using a number of model structures with trigonal, tetrahedral, octahedral, and free coordination of the metal borohydride complexes. Of the over 700 investigated structures, about 20 were predicted to form potentially stable alloys with promising decomposition energies. The M1Al/ Mn/ FeBH44, Li/ NaZnBH43, and Na/ KNi/ CoBH43 alloys are …

Inorganic chemistryGeneral Physics and Astronomy02 engineering and technologyab initio calculations ; aluminium alloys ; boron alloys ; cobalt alloys ; decomposition ; density functional theory ; electronic structure ; hydrogen ; hydrogen storage ; iron alloys ; lithium alloys ; manganese alloys ; nickel alloys ; niobium alloys ; potassium alloys ; rhodium alloys ; sodium alloys ; thermodynamics ; zinc alloysMaterialeforskning010402 general chemistryBorohydride01 natural sciences7. Clean energyMetalHydrogen storagechemistry.chemical_compoundMaterials and systems for energy storageTransition metalAb initio quantum chemistry methodsMaterialer og systemer til energilagringPhysical and Theoretical ChemistryMaterials research021001 nanoscience & nanotechnologyAlkali metal0104 chemical scienceschemistryvisual_artvisual_art.visual_art_mediumPhysical chemistryDensity functional theory0210 nano-technologyTernary operationThe Journal of chemical physics
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A new fixture for FSW processes of titanium alloys

2010

FSW of titanium alloys is nowadays one of the most challenging welding operations, even with a solid state process, due to the thermo-mechanical and thermo-chemical characteristics of such materials. Due to the relevant application of titanium alloys in the aeronautic and aerospace industries, in the recent years few attempts were carried out to develop FSW processes aimed to maximize the mechanical performances of the welded parts. In the paper a new fixture is presented allowing obtaining effective FSW joints of titanium blanks, which were investigated through mechanical and metallurgical tests highlighting the peculiarities of FSW of titanium alloys.

Materials sciencebusiness.industryWelding aluminium alloys FSW FEMMechanical EngineeringMetallurgySolid-statechemistry.chemical_elementTitanium alloyWeldingFixtureIndustrial and Manufacturing Engineeringlaw.inventionchemistrylawAerospacebusinessSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneTitaniumCIRP Annals
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