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Evolution of solidification texture during additive manufacturing.

H L Wei1, J Mazumder2, T DebRoy1

  • 1Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA.

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|November 11, 2015
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Summary
This summary is machine-generated.

Additive manufacturing of nickel-based alloys shows how laser scanning patterns control solidification texture. This understanding allows customization of textures for improved component properties and performance.

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Area of Science:

  • Materials Science
  • Metallurgy
  • Additive Manufacturing

Background:

  • Solidification texture in nickel-based alloys significantly impacts mechanical and chemical properties.
  • Controlling texture is crucial for optimizing component performance in additive manufacturing.
  • Texture is governed by heat flow direction and grain growth kinetics in face-centered cubic alloys.

Purpose of the Study:

  • To investigate the influence of laser scanning patterns on solidification textures in additively manufactured nickel-based alloys.
  • To establish a theoretical and experimental basis for understanding and controlling texture evolution.
  • To demonstrate the utility of numerical modeling in predicting and customizing solidification textures.

Main Methods:

  • Numerical modeling of three-dimensional heat transfer and fluid flow to analyze local heat flow directions.
  • Experimental data analysis to validate theoretical predictions.
  • Examination of various laser beam scanning patterns.

Main Results:

  • Laser scanning patterns induce striking differences in solidification textures.
  • Numerical modeling accurately predicts solidification growth patterns.
  • Identified a correlation between scanning patterns, heat flow, and resulting grain structures.

Conclusions:

  • Additive manufacturing offers a pathway to tailor solidification textures by manipulating laser scanning strategies.
  • Numerical modeling is a powerful tool for understanding and customizing texture for enhanced material properties.
  • Customized solidification textures are key to improving the performance of additively manufactured components.