Microstructure characterization and tensile properties of squeeze-cast AlSiMg alloys

Investigation of the microstructure and mechanical properties of squeeze cast Al-11%Si alloy heat treated

“…The evolutions of the mechanical properties are attributed to the remarkable decrease of the SDAS (Secondary Dendrite Arm Spacing) and increasing refinement of eutectic phase. Similarly, Abou El-Khair [7] found that squeeze pressures decrease the percentage of porosity and the grain size of α-Al and modify the Si eutectic. A380 alloy was studied by Chadwick and Yue [8] and was reported to have an increasing trend of yield strength (YS) 126 MPa and ultimate tensile strength (UTS) 133 MPa values as squeeze cast conditions compared to the conventional casting process.…”

Response to artificial ageing of dendritic and globular Al–7Si–Mg alloys

“…These components are produced both with conventional casting methods and via the innovative rheocasting route [4]. Silicon imparts to this alloy, good fluidity, resistance to hot cracking and thermal-expansion while magnesium improves its strength-to-weight ratio and yield stress, via combining with Si to form the age-hardening Mg 2 Si, which precipitates from a supersaturated solid solution during heat treatment [5][6][7]. Pronounced improvement occurs in strength properties of these alloys during ageing [8].…”

“…Pronounced improvement occurs in strength properties of these alloys during ageing [8]. The age-hardening response is influenced by a number of factors [6,7,[9][10][11]. As it dictates the volume fraction of Mg 2 Si, the principal hardening phase, Mg content is also expected to have a major impact on the ageing response of these excess-Si alloys [12].…”

Evaluation of Precipitation Hardening Characteristics of Rheology-Forged Al 7075 Aluminum Alloy Using Nano- or Microindentation and Atomic Force Microscopy

“…Atomic force microscopy can be used as an additional and reliable technique for investigating micro-or nanostructures on the surface of materials. [8] The combination of nanoindentation with AFM enables mechanical, tribological, and morphological properties to be measured at different regions, such as the eutectic and primary a-Al phase, down to the nanometer scale. [9,10] …”