Dislocation dynamics prediction of the strength of Al–Cu alloys containing shearable <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e706" altimg="si18.svg"><mml:msup><mml:mrow><mml:mi>θ</mml:mi></mml:mrow><mml:mrow><mml:mo>′</mml:mo><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:math> precipitates

The critical resolved shear stress of an Al 4 wt. % Cu alloy containing a homogeneous distribution of θ′′ precipitates was determined by means of dislocation dynamics simulations. The size distribution, shape, orientation and volume fraction of the precipitates in the alloy were obtained from transmission electron microscopy observations while the parameters controlling the dislocation/precipitate interactions (elastic mismatch, transformation...