Influence of scanning strategies on microstructure and mechanical properties of laser powder bed fusion 2195 Al-Li alloy
Source abstract
Abstract
Optimizing the scanning strategy is considered as an effective approach to address the challenges of laser powder bed fusion(LPBF). However, the impact of the scanning strategy on lightweight Al-Li alloys remains unclear. In this study, various scanning strategies LPBF were employed to process 2195 Al-Li alloy specimens, and a systematic investigation was conducted on the effects of the laser path on the defects, microstructure, and mechanical properties of 2195 Al-Li alloy. The results revealed that the specimens processed with the linear strategy exhibited the lowest gas pores and crack density, achieving a densification rate of 98.6 %. Furthermore, adjusting the scanning strategy led to changes in grain morphology among specimens; those processed with linear scanning demonstrated smaller average grain size (19.7 μm), a lower percentage of high-angle grain boundaries (HAGBs) (57.4 %), and a higher texture index compared to other strategies tested. When employing linear strategy for processing, tensile performance reached 315.03 MPa with 5.03 % elongation due to concise thermal history and fast cooling conditions associated with this particular scanning method. This study provides valuable insights into optimizing scanning strategies for LPBF 2195 Al-Li alloy.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Additive Manufacturing and 3D Printing Technologies · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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