Arne K. Dahle

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Aluminium phosphide (AlP) particles are often suggested to be the nucleation site for eutectic silicon in Al-Si alloys, since both the crystal structure and lattice parameter of AlP (crystal structure: cubic F43m; lattice parameter: 5.421 A) are close to that of silicon (cubic Fd3m, 5.431 A), and the melting point is higher than the Al-Si eutectic(More)
An approach to the qualitative analysis of quenched microstructures in three dimensions is presented and demonstrated on unmodified and Sr-modified Al–10% Si samples. The samples were repeatedly polished to obtain a series of digital images through the depth of the microstructure. A three-dimensional reconstruction of the microstructure was obtained by(More)
The aim of this work is to improve the quality of castings by minimizing defects and scrap through the analysis of the data generated by High Pressure Die Casting (HPDC) Machines using computational intelligence techniques. Casting is a complex process· that is affected by the interdependence of die casting process parameters on each other such that changes(More)
50 patients undergoing elective vascular surgery were randomized to prophylactic antibiotic treatment with ampicillin 2 g X 4 + cloxacillin 1 g X 4 for 4 d following the operation, or to a control group without antibiotics. All patients received heparin subcutaneously 5000 IU X 2, for 7 d. On days 1 and 4 after the operation, the median bleeding time was 1(More)
Al-Si alloys are the most popular casting alloys due to their excellent castability combined with high strengthto-weight ratio. This paper investigates the role of Si content in the range of 6.5 wt. % to 14.4 wt. % on the microstructure and mechanical properties of Al-Si-Mg casting alloys. All alloys were modified with 90-150 ppm Sr. No grain refiner was(More)
The application of intraluminal stents after dilatation of arterial stenoses and occlusions has proved to be a valuable addition to the armamentarium of radiological interventions. During the last two years we have applied 70 stents to 59 arterial lesions of the lower extremities in 45 patients. 57, or 96.6%, of the procedures were primarily successful,(More)
We describe a case of Horner syndrome following insertion of a chest tube in a 27 year old male. The syndrome was discovered the day after insertion of the tube and persisted for at least three months. By the time of a control examination six months after insertion the symptoms had disappeared. Caution must be taken when inserting a chest tube. Pressure of(More)
Aluminium-silicon alloys have gained increasing market share in the automotive and aerospace industry because of increased environmental demands. These alloys have a high strength-to-weight ratio, good corrosion resistance, castability and recycling potential. However, variations in properties and limited performance at elevated temperature are restricting(More)
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