Chudatip Panthglin | King Mongkut's University of Technology Thonburi (original) (raw)
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Indian Institute of Engineering Science and Technology, Shibpur
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Papers by Chudatip Panthglin
International Journal of Metalcasting, 2021
The influences of Zr on the microstructures and impression creep behavior of A356–SiC composites ... more The influences of Zr on the microstructures and impression creep behavior of A356–SiC composites were investigated. An optical microscope and a scanning electron microscopy were used to examine the microstructure. An impression creep test was conducted in a temperature range of 225–275 °C under a stress range of 350–450 MPa. The addition of 0.14 wt% Zr can significantly improve the creep resistance of the A356–SiC composite. The stress exponent (n) and creep activation energy (Q) reveal that the lattice diffusion climb-controlled creep is a dislocation climb in the A356–SiC composite, and with the addition of Zr in the A356–SiC composite, grain boundary sliding is the dominant creep mechanism. The activation energy for creep is obtained in a range of 112–173 kJ/mol, which is close to the value for the lattice self-diffusion of aluminum (142 kJ/mol). The addition of Zr alters the creep mechanism of the A356–SiC composite. The creep resistance of A356–SiC composites with added Zr high...
International Journal of Metalcasting
The influences of Zr on the microstructure of A356-15 vol% SiC composites, such as the distributi... more The influences of Zr on the microstructure of A356-15 vol% SiC composites, such as the distribution of SiC particles in the matrix, the grain size and the hardness and impression creep between 225 and 275°C, were examined. These composites were prepared using the stir casting technique. The addition of Zr forms Al 3 Zr phases, which can act as heterogeneous nucleation sites, thus resulting in grain refinement. Furthermore, Zr leads to a more uniform distribution and an increased area fraction of SiC particles. Moreover, the addition of only 0.1 wt% Zr significantly increased the Brinell hardness by approximately 18% when compared to the composite without added Zr. The addition of a small amount of Zr (0.1 wt%) is sufficient to increase the Vickers microhardness by approximately 34% when compared to the composite without added Zr, indicating the effect of solid solution strengthening on the composite matrix. The high-temperature stability test using the impression creep technique demonstrated that the A356-15 vol% SiC composite with 0.1 wt% added Zr shows improved creep resistance. However, the creep resistance of composite samples with higher than 0.1 wt% added Zr decreases due to grain boundary sliding occurring in the A356-15vol% SiC composites with too much added Zr.
International Journal of Metalcasting, 2021
The influences of Zr on the microstructures and impression creep behavior of A356–SiC composites ... more The influences of Zr on the microstructures and impression creep behavior of A356–SiC composites were investigated. An optical microscope and a scanning electron microscopy were used to examine the microstructure. An impression creep test was conducted in a temperature range of 225–275 °C under a stress range of 350–450 MPa. The addition of 0.14 wt% Zr can significantly improve the creep resistance of the A356–SiC composite. The stress exponent (n) and creep activation energy (Q) reveal that the lattice diffusion climb-controlled creep is a dislocation climb in the A356–SiC composite, and with the addition of Zr in the A356–SiC composite, grain boundary sliding is the dominant creep mechanism. The activation energy for creep is obtained in a range of 112–173 kJ/mol, which is close to the value for the lattice self-diffusion of aluminum (142 kJ/mol). The addition of Zr alters the creep mechanism of the A356–SiC composite. The creep resistance of A356–SiC composites with added Zr high...
International Journal of Metalcasting
The influences of Zr on the microstructure of A356-15 vol% SiC composites, such as the distributi... more The influences of Zr on the microstructure of A356-15 vol% SiC composites, such as the distribution of SiC particles in the matrix, the grain size and the hardness and impression creep between 225 and 275°C, were examined. These composites were prepared using the stir casting technique. The addition of Zr forms Al 3 Zr phases, which can act as heterogeneous nucleation sites, thus resulting in grain refinement. Furthermore, Zr leads to a more uniform distribution and an increased area fraction of SiC particles. Moreover, the addition of only 0.1 wt% Zr significantly increased the Brinell hardness by approximately 18% when compared to the composite without added Zr. The addition of a small amount of Zr (0.1 wt%) is sufficient to increase the Vickers microhardness by approximately 34% when compared to the composite without added Zr, indicating the effect of solid solution strengthening on the composite matrix. The high-temperature stability test using the impression creep technique demonstrated that the A356-15 vol% SiC composite with 0.1 wt% added Zr shows improved creep resistance. However, the creep resistance of composite samples with higher than 0.1 wt% added Zr decreases due to grain boundary sliding occurring in the A356-15vol% SiC composites with too much added Zr.