| Autor: |
Pushkar Prakash Dhekne, Tijmen Vermeij, Vivek Devulapalli, Suraj Dinkar Jadhav, Johan P.M. Hoefnagels, Marc G.D. Geers, Kim Vanmeensel |
| Přispěvatelé: |
Group Geers, Mechanics of Materials, Group Hoefnagels |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Scripta Materialia, 233:115505. Elsevier |
| ISSN: |
1359-6462 |
| DOI: |
10.1016/j.scriptamat.2023.115505 |
| Popis: |
Industrial implementation of heat-treated Laser Powder Bed Fusion (L-PBF) processed Ti-6Al-4 V components requires a thorough understanding of the plastic deformation mechanisms to predict the part performance in safety-critical environments. Here, we study the micro-mechanical deformation behavior of a heat-treated L-PBF processed Ti-6Al-4 V by in-situ uniaxial tensile loading, during which high-resolution strain fields were monitored by Scanning Electron Microscope (SEM) based Digital Image Correlation (DIC). SEM-DIC revealed: (i) the transformed beta phase accommodates higher strain than the primary alpha phase; (ii) strain accumulation in primary alpha occurs primarily at the interface regions where the Al content is lower; and (iii) needle-shaped secondary alpha precipitate in the transformed beta creates strain localization pathways that bridge the interfacial strain bands. Based on the in-situ deformation behavior, recommendations are made on microstructure tailoring and alloy design to prevent strain localization and enhance the quasi-static mechanical properties of L-PBF processed titanium alloy components. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect