TY - JOUR
T1 - Influence of post-processing techniques on the microstructure, properties and surface integrity of Al[sbnd]Si[sbnd]Mg alloy processed by laser powder bed fusion technique
AU - Subramaniyan, Anand Kumar
AU - Reddy, Anigani Sudarshan
AU - Mathias, Snehith
AU - Shrivastava, Abhishek
AU - Raghupatruni, Prasad
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11/15
Y1 - 2021/11/15
N2 - The present work investigates the influence of post-processing techniques such as heat treatments (T5 and T6 conditions) and the shot peening (SP) under peening pressures such as 3 bar (SP-3) and 6 bar (SP-6) on the LPBF processed AlSi10Mg alloy. The microstructures of as-printed and heat-treated samples revealed a density of greater than 99.9%. The micro-hardness, yield and tensile strength properties were similar in both as-printed and heat-treated (T5) conditions. However, the samples of the heat-treated (T6) showed lower micro-hardness, yield and tensile strength properties than as-printed and heat-treated (T5) samples. There was a significant decrease in surface roughness and a notable improvement in surface hardness for shot-peened samples compared to the as-printed samples. SP process decreased the surface roughness parameter values by more than about ~50% compared to the as-printed samples. The SP-3 condition induced a smoother surface (~12%) than the SP-6 condition on the LPBF processed AlSi10Mg samples. Overall, the employed post-processing techniques such as heat treatment and shot peening on the LPBF processed AlSi10Mg alloy exhibit improved isotropic mechanical properties and surface integrity.
AB - The present work investigates the influence of post-processing techniques such as heat treatments (T5 and T6 conditions) and the shot peening (SP) under peening pressures such as 3 bar (SP-3) and 6 bar (SP-6) on the LPBF processed AlSi10Mg alloy. The microstructures of as-printed and heat-treated samples revealed a density of greater than 99.9%. The micro-hardness, yield and tensile strength properties were similar in both as-printed and heat-treated (T5) conditions. However, the samples of the heat-treated (T6) showed lower micro-hardness, yield and tensile strength properties than as-printed and heat-treated (T5) samples. There was a significant decrease in surface roughness and a notable improvement in surface hardness for shot-peened samples compared to the as-printed samples. SP process decreased the surface roughness parameter values by more than about ~50% compared to the as-printed samples. The SP-3 condition induced a smoother surface (~12%) than the SP-6 condition on the LPBF processed AlSi10Mg samples. Overall, the employed post-processing techniques such as heat treatment and shot peening on the LPBF processed AlSi10Mg alloy exhibit improved isotropic mechanical properties and surface integrity.
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U2 - 10.1016/j.surfcoat.2021.127679
DO - 10.1016/j.surfcoat.2021.127679
M3 - Article
AN - SCOPUS:85114933188
SN - 0257-8972
VL - 425
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
M1 - 127679
ER -