期刊
MATERIALS
卷 13, 期 17, 页码 -出版社
MDPI
DOI: 10.3390/ma13173805
关键词
316L austenitic steel; selective laser melting; mechanical properties; hot isostatic pressing; precipitation heat treatment
类别
资金
- European Social Fund under the Knowledge Education Development Operational Programme in 2014-2020
- [22-758]
In this study, we analyzed the mechanical properties of selectively laser melted (SLM) steel obtained via different modifications during and after the manufacturing process. The aim was to determine the effects of precipitation heat treatment on the mechanical properties of elements additively manufactured using three different process parameters. Some samples were additionally obtained using hot isostatic pressing (HIP), while some were treated using two different types of heat treatment and a combination of those two processes. From each manufactured sample, a part of the material was taken for structural analysis including residual stress analysis and microstructural investigations. In the second part of the research, the mechanical properties were studied to define the scleronomic hardness of the samples. Finally, tensile tests were conducted using a digital image correlation (DIC) test and fracture analysis. The treated samples were found to be significantly elongated, thus indicating the advantages of using precipitation heat treatment. Additionally, precipitation heat treatment was found to increase the porosity of samples, which was the opposite compared to HIP-treated samples.
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