Effects of post-processing on the microstructural evolution and mechanical behaviour of an additively manufactured AlSi10Mg alloy
AlSi10Mg alloy finds critical applications in the automotive sector, such as in cylinder heads, engine blocks, and wheels. Such applications often require intricate parts that can be fabricated only through additive manufacturing. In this context, the fatigue life of the additively manufactured comp...
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424030515 |
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| author | R. Ramesh Saurabh Gairola R. Jayaganthan M. Kamaraj |
| author_facet | R. Ramesh Saurabh Gairola R. Jayaganthan M. Kamaraj |
| author_sort | R. Ramesh |
| collection | DOAJ |
| description | AlSi10Mg alloy finds critical applications in the automotive sector, such as in cylinder heads, engine blocks, and wheels. Such applications often require intricate parts that can be fabricated only through additive manufacturing. In this context, the fatigue life of the additively manufactured components is crucial to prevent sudden failure during real-life application. The post-processing techniques such as heat treatment (HT) and shot blasting (SB) have the potential to enhance the fatigue performance of AlSi10Mg. However, their effectiveness in improving fatigue properties has not been explored so far. Hence, this study examines the effect of the combination of HT and SB on the fatigue life of AlSi10Mg alloy. The fatigue strength of the Laser Powder Bed Fusion (LPBF) increases from 43 MPa in the as-built (AB) condition to 44.5 MPa in the HT + SB condition. The strengthening mechanisms contributing to the high tensile and fatigue strength in different conditions were explored using various microscopy techniques such as Scanning Electron Microscope (SEM) and Electron Back-Scattered Diffraction (EBSD). Silicon precipitates, in the form of cellular structures and spherical forms, were found to significantly contribute to the strength of an alloy, accounting for 63%, 52%, and 50.7% of the total strength in AB, HT and HT + SB conditions, respectively. |
| format | Article |
| id | doaj-art-df0ae7216bd34306aeec89671576becb |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-df0ae7216bd34306aeec89671576becb2025-01-19T06:25:57ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013428022813Effects of post-processing on the microstructural evolution and mechanical behaviour of an additively manufactured AlSi10Mg alloyR. Ramesh0Saurabh Gairola1R. Jayaganthan2M. Kamaraj3Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Madras, Chennai, 600036, Tamilnadu, India; Department of Engineering Design, Indian Institute of Technology, Madras, Chennai, 600036, Tamilnadu, India; Additive Manufacturing Group, Centre of Excellence in Materials and Manufacturing for Futuristic Mobility, Indian Institute of Technology Madras, Chennai, 600036, Tamilnadu, IndiaDepartment of Engineering Design, Indian Institute of Technology, Madras, Chennai, 600036, Tamilnadu, India; Additive Manufacturing Group, Centre of Excellence in Materials and Manufacturing for Futuristic Mobility, Indian Institute of Technology Madras, Chennai, 600036, Tamilnadu, IndiaDepartment of Engineering Design, Indian Institute of Technology, Madras, Chennai, 600036, Tamilnadu, India; Additive Manufacturing Group, Centre of Excellence in Materials and Manufacturing for Futuristic Mobility, Indian Institute of Technology Madras, Chennai, 600036, Tamilnadu, India; Corresponding author. Department of Engineering Design, Indian Institute of Technology, Madras, Chennai, 600036, Tamilnadu, India.Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Madras, Chennai, 600036, Tamilnadu, IndiaAlSi10Mg alloy finds critical applications in the automotive sector, such as in cylinder heads, engine blocks, and wheels. Such applications often require intricate parts that can be fabricated only through additive manufacturing. In this context, the fatigue life of the additively manufactured components is crucial to prevent sudden failure during real-life application. The post-processing techniques such as heat treatment (HT) and shot blasting (SB) have the potential to enhance the fatigue performance of AlSi10Mg. However, their effectiveness in improving fatigue properties has not been explored so far. Hence, this study examines the effect of the combination of HT and SB on the fatigue life of AlSi10Mg alloy. The fatigue strength of the Laser Powder Bed Fusion (LPBF) increases from 43 MPa in the as-built (AB) condition to 44.5 MPa in the HT + SB condition. The strengthening mechanisms contributing to the high tensile and fatigue strength in different conditions were explored using various microscopy techniques such as Scanning Electron Microscope (SEM) and Electron Back-Scattered Diffraction (EBSD). Silicon precipitates, in the form of cellular structures and spherical forms, were found to significantly contribute to the strength of an alloy, accounting for 63%, 52%, and 50.7% of the total strength in AB, HT and HT + SB conditions, respectively.http://www.sciencedirect.com/science/article/pii/S2238785424030515AlSi10MgAdditive manufacturingLPBFMicrostructureHardnessTensile and fatigue |
| spellingShingle | R. Ramesh Saurabh Gairola R. Jayaganthan M. Kamaraj Effects of post-processing on the microstructural evolution and mechanical behaviour of an additively manufactured AlSi10Mg alloy Journal of Materials Research and Technology AlSi10Mg Additive manufacturing LPBF Microstructure Hardness Tensile and fatigue |
| title | Effects of post-processing on the microstructural evolution and mechanical behaviour of an additively manufactured AlSi10Mg alloy |
| title_full | Effects of post-processing on the microstructural evolution and mechanical behaviour of an additively manufactured AlSi10Mg alloy |
| title_fullStr | Effects of post-processing on the microstructural evolution and mechanical behaviour of an additively manufactured AlSi10Mg alloy |
| title_full_unstemmed | Effects of post-processing on the microstructural evolution and mechanical behaviour of an additively manufactured AlSi10Mg alloy |
| title_short | Effects of post-processing on the microstructural evolution and mechanical behaviour of an additively manufactured AlSi10Mg alloy |
| title_sort | effects of post processing on the microstructural evolution and mechanical behaviour of an additively manufactured alsi10mg alloy |
| topic | AlSi10Mg Additive manufacturing LPBF Microstructure Hardness Tensile and fatigue |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424030515 |
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