Microstresses and crack formation in AlSi7MgCu and AlSi17Cu4 alloys for engine components

Influence of 3D connectivity of rigid phases on damage evolution during tensile deformation of an AlSi12Cu4Ni2 piston alloy

“…The microstructure of cast near eutectic Al-Si piston alloys consists of interconnected 3D hybrid networks formed by Si (primary and eutectic) and intermetallic phases embedded in a comparatively soft α-Al matrix [3][4][5][6][7][8]. The load carrying capability of these networks is affected by topological and morphological changes that they can undergo during thermal heat treatments and due to the thermo-mechanical conditions during service [4,5,[9][10][11].…”

Effect of solidification sequence on the microstructure and mechanical properties of die-cast Al–11Si–2Cu–Fe alloy

“…size, morphology and distribution) [28,29]. The variation of the alloy structure with the decrease of solidification time leads to the development of a fine eutectic structure, as shown in Fig.…”

Influence of Gd content on microstructure and mechanical properties of cast Al–12Si–4Cu–2Ni–0.8Mg alloys

“…Rare earth elements have low diffusion velocity in aluminum, and its additions to aluminum base alloys result in increases in heat-durability and thermal stability, while a decrease in the thermal expansion coefficient [8][9][10]. As a beneficial micro alloying element, Sc has been studied mostly due to the presence of elastically hard, coherent and nano-sized Al 3 Sc particles, which could strongly refine the as-cast grain size and inhibit the dislocation movements [11]. It has been reported that some mechanical properties, such as the peak hardness of Al alloys, do not change after partial replacement of expensive Sc by Gd [12].…”

“…In aluminum alloys, eutectic and near-eutectic Al-Si alloys have been widely used in producing piston for their excellent abrasion and corrosion resistance, low coefficient of thermal expansion, high strength-to-weight ratio and high elevated temperature strength [1][2][3]. However, with the development of the industry and increase of people's awareness towards environment and resources, automotive engines efficiency, greater demands have been placed on the properties of cast Al-Si-Cu-Ni-Mg alloys, especially the elevated-temperature properties [4].…”