Strain-induced martensitic transformations in tailored microstructures by L-PBF: In situ characterization via advanced neutron imaging
Source abstract
Abstract
The possibility of controlling the microstructure in laser powder bed fusion (L-PBF) by locally changing the processing parameters, opens the possibility of building complex structures with tailored microstructures, leading to the development of smart materials. For metastable austenitic steels, the crystallographic texture strongly affects the TRIP effect. By employing L-PBF it is possible to locally engineer the microstructure to enhance or suppress the phase transformations. Here we quantitatively assess the transformation behavior of metastable stainless steel multitextured specimens manufactured by L-PBF under uniaxial tension quantifiting the formation of α′-martensite volume fraction in situ by employing polarization contrast neutron imaging (PNI). The results demonstrate a direct correlation between the local crystallographic texture of the specimens and the TRIP effect, providing valuable insights into the transformative potential of L-PBF in tailoring microstructures as well as the usefulness of PNI for characterizing complex structures.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Nuclear Physics and Applications · Microstructure and Mechanical Properties of Steels · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Highly anisotropic steel processed by selective laser melting10.1007/s11663-013-9875-z ↗
2. Non-equilibrium microstructure, crystallographic texture and morphological texture synergistically result in unusual mechanical properties of 3D printed 316L stainless steel
3. Steels in additive manufacturing: a review of their microstructure and properties10.1016/j.msea.2019.138633 ↗
4. The effect of laser scanning strategies on texture, mechanical properties, and site-specific grain orientation in selective laser melted 316L SS10.1016/j.matdes.2020.108852 ↗
5. Layer-wise engineering of grain orientation (LEGO) in laser powder bed fusion of stainless steel 316L
6. Site-specifically tailored microstructures with enhanced strength and hardening through laser powder bed fusion10.1016/j.matdes.2023.112539 ↗
7. Texture control of 316L parts by modulation of the melt pool morphology in selective laser melting10.1016/j.jmatprotec.2018.08.049 ↗
8. Controlled crystallographic texture orientation in structural materials using the laser powder bed fusion process—a review10.1002/adem.202300819 ↗
9. Control of anisotropic crystallographic texture in powder bed fusion additive manufacturing of metals and ceramics—a review10.1007/s11837-021-04966-7 ↗
10. Sofras · 2022
11. Highly anisotropic steel processed by selective laser melting10.1007/s11663-013-9875-z ↗
12. Microstructure–texture–mechanical property relationship in alloys produced by additive manufacturing following selective laser melting (SLM) technique10.1007/s41403-019-00081-x ↗
13. Encoding data into metal alloys using laser powder bed fusion
14. Neutron diffraction and diffraction contrast imaging for mapping the TRIP effect under load path change10.3390/ma13061450 ↗
15. The interplay between deformation mechanisms in austenitic 304 steel during uniaxial and equibiaxial loading10.1016/j.msea.2019.138222 ↗
16. Suppressed martensitic transformation under biaxial loading in low stacking fault energy metastable austenitic steels10.1016/j.scriptamat.2017.12.026 ↗
17. In-situ neutron diffraction during biaxial deformation10.1016/j.actamat.2015.12.015 ↗
18. Architectured heterogeneous alloys with selective laser melting10.1016/j.scriptamat.2021.114332 ↗
19. Tailored deformation behavior of 304L stainless steel through control of the crystallographic texture with laser-powder bed fusion10.1016/j.matdes.2022.110789 ↗
20. Sofras · 2024
21. Polarization measurements in neutron imaging10.1088/1361-6463/aafa5e ↗
22. Polarization contrast neutron imaging of magnetic crystallographic phases10.1016/j.mtadv.2022.100302 ↗
23. 3D characterization of magnetic phases through neutron polarization contrast tomography10.1016/j.addlet.2023.100155 ↗
24. Exploring crystallographic texture manipulation in stainless steels via laser powder bed fusion: insights from neutron diffraction and machine learning10.1080/17452759.2024.2390483 ↗
25. Microstructure analysis of the martensitic stainless steel surface fine-cut by the wire electrode discharge machining (WEDM)10.1016/j.msea.2003.10.277 ↗
26. On the passage of neutrons through ferromagnets10.1103/PhysRev.59.960 ↗
27. Time-of-flight diffraction with multiple frame overlap Part II: the strain scanner POLDI at PSI10.1016/j.nima.2005.01.321 ↗
28. A novel pole figure inversion method: specification of the MTEX algorithm10.1107/S0021889808030112 ↗
29. High ductility and transformation-induced-plasticity in metastable stainless steel processed by selective laser melting with low power10.1016/j.scriptamat.2019.09.035 ↗
30. Crystallographic-orientation-dependent tensile behaviours of stainless steel 316L fabricated by laser powder bed fusion10.1016/j.msea.2019.138395 ↗