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May 19, 2021MetalsOpen Access

Process Optimization and Microstructure Analysis to Understand Laser Powder Bed Fusion of 316L Stainless Steel

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Authors

NVNathalia Diaz VallejoUniversidad del ValleCLCameron LucasUniversity of Central FloridaNANicolas AyersUniversity of Central Florida

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Overview

Randomized trial investigates microstructural properties of 316L stainless steel using optimized LPBF parameters, suggesting improved performance.

Key Points

  • To analyze the microstructural development of 316L stainless steel during laser powder bed fusion optimization.
  • Systematically varied laser powder bed fusion parameters such as laser power and scan speed.
  • Quantified relative density, melt pool dimensions, and sub-grain cellular structure size.
  • Estimated temperature fields using Rosenthal solution.
  • Achieved nearly fully dense samples (≥99.8%) with optimized parameters: 200 W power, 800 mm/s scan speed, 0.12 mm hatch spacing.
  • Yield strength averaged 563 MPa, Young’s modulus 179 GPa, tensile strength 710 MPa, and 48% strain at failure.
  • Cooling rates estimated between 105 to 107 K/s based on cellular structure size within melt pools.

Cite This Study

Vallejo et al. (2021) studied this question.

synapsesocial.com/papers/6a714ccb26770c2b8de105cbhttps://doi.org/10.3390/met11050832
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