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Iron stories. The descriptions of the 18th century. Part II: On the various conceptions of cast-iron conversion in the finery hearth. The descriptions of iron metallurgy by the 18th-century scientists are exposed and discussed, through cast iron production and refining into wrought iron or steel. This second part shows the selection criteria between white and grey cast iron and the refining control...
Des essais de compression sont realises sur un acier 50CrMo4 afin de caracteriser son comportement a des deformations (jusqu'a 150 %), des vitesses de deformation (jusqu'a 50 s -1 ) et des temperatures (293 a 673 K) correspondant a une application d'extrusion. Pour cela on utilise une machine servo-hydraulique munie d'un verin dynamique permettant de realiser des essais a des vitesses...
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