Characterization of fracture and debonding of Si particles in AlSi alloys

Revealing the Effect of Local Connectivity of Rigid Phases during Deformation at High Temperature of Cast AlSi12Cu4Ni(2,3)Mg Alloys

“…This is in agreement with previous reports in which an increase in the fraction of decohesion between Si/matrix interfaces and matrix damage in shape of voids was also observed after deformation of Al-Si alloys at elevated temperature [33,34,38,39,40]. Decohesion is known to result from accumulation of plastic deformation of the matrix in the vicinity of rigid phases, while fracture of rigid particles occurs owing to incompatible stresses between rigid phase and matrix [33].…”

“…Decohesion is known to result from accumulation of plastic deformation of the matrix in the vicinity of rigid phases, while fracture of rigid particles occurs owing to incompatible stresses between rigid phase and matrix [33]. Elevated temperatures facilitate plastic deformation of the matrix, and thus aid in alleviating the mismatch stresses, promoting decohesion instead of fracture [34].…”

Double-stage hardening behavior and fracture characteristics of a heavily alloyed Al–Si piston alloy during low-cycle fatigue loading

“…Typically pistons are cast from near eutectic Al-Si alloys due to their high wear resistance, high strength over weight ratio, high stiffness, and a low thermal expansion coefficient [17][18][19][20]. Especially, the alloys contain several major alloying elements that may form complex multiphase microstructures, comprising eutectic Al-Si composition, diverse intermetallic particles and numerous precipitates [21]. These intermetallic and precipitate compounds include binary phases (e.g.…”

Evaluating the mechanical properties of a thermomechanically processed unmodified A356 Al alloy employing shear punch testing method

“…This is related to the high levels of stress concentration around the lengthy Si particles [37]. In contrast, the Si particles with spherical shape exhibit a higher resistance to debonding under the imposed straining [38]. As the Si spheroidization is more pronounced at higher TMP temperatures [39], the observed enhancement in the UTS values with increasing the TMP temperature seems reasonable.…”