A comparative study of additive manufactured and wrought SS316L: Pre-existing dislocations and grain boundary characteristics

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A comparative study of additive manufactured and wrought SS316L: Pre-existing dislocations and grain boundary characteristics
Title:
A comparative study of additive manufactured and wrought SS316L: Pre-existing dislocations and grain boundary characteristics
Other Titles:
Materials Science and Engineering: A
Publication Date:
24 December 2021
Citation:
Wei, F., Cheng, B., Kumar, P., Wang, P., Lee, J. J., Seng, H. L., Cheong, K. H., Lau, K. B., & Tan, C. C. (2022). A comparative study of additive manufactured and wrought SS316L: Pre-existing dislocations and grain boundary characteristics. Materials Science and Engineering: A, 833, 142546. https://doi.org/10.1016/j.msea.2021.142546
Abstract:
The additively manufactured (AM) SS316L shows superior mechanical properties compared to their conventionally manufactured (CM) counterparts. A quantitative comparison is conducted based on the pre-existing dislocations and grain boundary characteristics of AM and CM SS316L, found that the AM possesses more dislocations and significantly larger portion of low angle grain boundaries, resulting in different effective strengthening mechanisms. Coincident site lattice boundaries, yielding higher strength and better ductility, show much diverse distributions in the AM samples, with only very little Σ3. The AM grain boundaries show very distinct behaviors under tensile strain compared to the CM sample. This work conducted in-depth investigations on the strengthening mechanisms and shed a light on grain boundary engineering to further enhance the mechanical properties of AM materials.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the Agency for Science, Technology and Research - Structural Metal Alloy Program (SMAP)
Grant Reference no. : A18b1B0061
Description:
ISSN:
0921-5093
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