2014 A summary is given of data obtained from neutron diffraction experiments on heavy water at elevated pressures and temperatures using three different types of pressure vessel. The pressure vessels were manufactured from (i) hard steel (EN24T), (ii) titanium-zirconium null alloy, and (iii) autofrettaged aluminium alloy (7075-T6). In cases (i) and (ii), hydraulic pressures up to 6 kbar were a...

Laser shock peening (LSP) can introduce a compressive stress profile for improving the materials’ surface mechanic properties. 6065 Aluminium alloy is introduced recently in the aeronautic components. The surface performances of the components are related directly to the surface activity and surface corrosion properties which are influenced by the near-surface stress gradient. So, the determina...

Current work elaborates possibilities for direct conversion of AlMgSi1 aluminium chips into solid billets by solid state recycling. Milling chips from an aluminium alloy were cold compressed in a closed cylindrical die by means of a 2,5 MN hydraulic press. Due to low initial relative density of the chips, several pre-compressions were needed. In order to establish the infl uence of chip geometr...

With the increasing demands of high surface irregularities and machining of composites, conventional machining processes are now being replaced by high speed Computer Numerical Control (CNC) machines. In this paper aluminium silicate made from alloying aluminium and silicon oxide made from rice husk are used. The machining of the alloy on CNC machine is carried out. In addition to speed, feed a...

the variations of the electrical conductivity with temperature and electric field of the ternary alloy of gallium, aluminium and arsenic (al0.75ga0.25as) with atomic compositions of 99/1 and 98/2 have been investigated. the electrical conductivity of the alloy increases with temperature according to the relation, ? = ?0 exp (??/kt). the activation energy calculated from this empirical relation ...

High strength aluminium alloys are widely employed in aerospace applications. However specific environmental conditions may trigger corrosion and therefore these alloys require additional protection. Most current conversion coatings used for this purpose are Cr(VI) based, and thus environmentally undesirable. A possible replacement is a Ti based coating, Nabutan STI/310. The aim of this work is...

Compared to steels, aluminium-alloys are comparably strong but 3 times lighter, inoxidable and unfavorable producing mechanical sparks. Aluminium alloys therefore attractive materials have been widely applied transportation industry in developed countries since 1950s. An alunimium-alloy tank has upto 20% more useful volume than a steel for the same total weight. Interior exterior protective coa...

Uniaxial tensile tests of aluminium-lithium alloy AA1420 were conducted at superplastic forming conditions. The mechanical properties of this Al-Li alloy were then modelled by a set of physicallybased constitutive equations. The constitutive equations describe the isotropic work hardening, recovery and damage by dislocation density changes and grain size evolution. Based on a recent upgraded op...