METHOD OF INCREASING FATIGUE LIMIT AND TENACITY OF HIGH STRENGTH ALUMINUM ALLOY

摘要

The invention relates to a method for the object of the characteristics of fatigue and tenacity alloys of al wrought to the processes using a treatment thermomechanical practice on the product cast and optionally homogenized. / p & & p & it comprises the following steps: / p & & p & a.coulee of an initial product according to an axis xx by a method known; / p & & p & b.homogeneisation any; / p & & p & c.refoulement is hot, then to the press, along the axis xx, with a rate of delivery (final initialelongueur length along the axis xx) 1,4; / p & & p & d.etirage when hot in the direction of the axis xx, with a deformation ratio (initialesection final counted transverse cross section perpendicular to axis xx) 1,5; / p & & p & e.compression hot along an axis perpendicular to the axis xx, with a degree of reduction (cross section of the initial - finalesection initial transverse cross section) 15; / p & & p & f.laminage, extrusion or forging in the usual conditions, as well as the operations usual quenching and tempering with relaxation any of the stresses of deformation (state t6, t651 or t652 for example). / p & & p & for mechanical equivalent characteristics, it makes it possible to increase up to 50 about the characteristics of fatigue or tenacity for the treatment.