in this study, ultrafine grained 2024 al alloy based b4c particles reinforced composite was produced by mechanical milling and hot extrusion. mechanical milling was used to synthesize the nanostructured al2024 in attrition mill under argon atmosphere up to 50h. a similar process was used to produce al2024-5%wt. b4c composite powder. to produce trimodal composites, milled powders were combined w...

A plasticity-induced crack-closure model was used to study fatigue crack growth and closure in thin 2024-T3 aluminum alloy under constant-R and constant-Kmax threshold testing procedures. Two methods of calculating crack-opening stresses were compared. One method was based on contact-K analyses and the other on contact crack-openingdisplacement (COD) analyses. These methods gave nearly identica...

The purpose of this search is to study the main factors on surface roughness in (AL-2024) using a CNC milling machine for an HSS tool with flat end milling. And by Taguchi experience design method conserve time and costs. To determine optimal values ​​of optimization. We then performed analysis variance regression. Confirmation tests were verify work. cutting process consists two stages; first ...