Effect of microstructure and overaging on the tensile behavior at room and elevated temperature of C355-T6 cast aluminum alloy

High-temperature mechanical properties of cast Al–Si–Cu–Mg alloy by combined additions of cerium and zirconium

“…In general, an increase in temperature test produces a decrease in the UTS as well as an enhancement in strain. This behavior is well known and represents the effects of temperature over softening of the matrix, reduce of strengthening precipitates, and consequently, lower efficiency in hindering dislocations movement [18].…”

“…In recent years, efforts have been made for improving cast alloys mechanical properties, mainly in superior temperatures than the ones of the conventional applications. A significant number of studies on cast Al-Si-Cu-Mg alloys [13][14][15][16][17][18] were conducted due to its important applications in the transport sector in a large variety of components. Basically, in order to improve the strength, particularly at high temperatures, alloying elements that exhibit both limited solid solubility and low diffusivity in Al must be added [19].…”

Optimization of A354 Al-Si-Cu-Mg Alloy Heat Treatment: Effect on Microstructure, Hardness, and Tensile Properties of Peak Aged and Overaged Alloy

“…For comparison, tensile data of A354-T6 and C355-T6 alloys refer to samples characterized by similar SDAS values (~20-25 µm) and similarly obtained from HIPped castings. For A354-T6 and C355-T6 alloys, the over aging condition was set to 41 h at 210 • C. A detailed microstructural and mechanical characterization for such alloys can be found elsewhere [8,9]. Fractographic analyses were carried out on tensile fracture surfaces by means of SEM-EDS, which aim to assess the mechanisms of failure.…”

“…Aiming to ensure a superior thermal stability to cast aluminium alloys for applications such as diesel engines, copper is added to the traditional Al-Si-Mg alloys [2][3][4][5][6][7][8][9]. The concomitant presence of both copper and magnesium in Al-Si-Cu-Mg alloys enables the precipitation of more stable Cu-based intermetallic phases, which confers to the T6 alloys an increased thermal stability in comparison to traditional Al-Si-Mg alloys.…”

Effect of Heat Treatment on the Microstructure and Mechanical Properties of a Composite Made of Al-Si-Cu-Mg Aluminum Alloy Reinforced with SiC Particles

“…For example, Costa et al [7] found that for a directionally solidified Al-Si-Cu alloy, the profile of secondary dendrite arm spacing values obtained along the length of the DS casing increased only when the solution time adopted in the T6 heat treatment was increased from 5 to 8 h. They also found that the samples heat treated with a solution time of 8 h exhibited a decrease in hardness when compared to that of samples subjected to a solution time of 5 h, which may be associated with the corresponding increase in the dendritic arm spacing, coarsening of Si particles, and collapse of tertiary dendritic arms that makes the dendritic network less complex. Ceschini et al [11] found that the hardness, yield strength, and ultimate tensile strength of as-cast CAl5Si1Cu0.5Mg alloy, the chemical composition of which is similar to that of Al5Si1Cu0.5Mg alloy, were obviously reduced after overaging treatment, which was mainly caused by the coarsening of precipitated phases in the crystal. Thus, it is of importance to select the parameters of heat treatment to improve microstructure and mechanical properties of aluminum alloys.The aim of this paper was to evaluate the effect of T6 heat treatment on the microstructure and mechanical properties for Al5Si1Cu0.5Mg aluminum alloy and its composite reinforced with 1.5 wt.% SiC particles.…”