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Articles linked to this work by shared authors, journal, and citation graph.

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A Finite Element Analysis on the Effect of Scanning Pattern and Energy on Residual Stress and Deformation in Wire Arc Additive Manufacturing of EH36 Steel.

Materials (Basel, Switzerland)·2023
Same author

Effect of Phase Transformations on Scanning Strategy in WAAM Fabrication.

Materials (Basel, Switzerland)·2021
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Wire Arc Additive Manufacturing: A Study of Process Parameters Using Multiphysics Simulations.

You Sung Han1

  • 1Department of Mechatronics Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea.

Materials (Basel, Switzerland)
|December 9, 2023
PubMed
Summary
This summary is machine-generated.

Scanning patterns and speed critically impact residual stress in wire arc additive manufacturing (WAAM). Alternate scanning patterns minimize stress, while higher scan speeds increase martensite formation.

Keywords:
finite element analysisphase transformationresidual stresswire arc additive manufacturing

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Additive Manufacturing

Background:

  • Wire Arc Additive Manufacturing (WAAM) is a key technology for fabricating large metal components.
  • Understanding process-structure-property relationships is crucial for optimizing WAAM.
  • Residual stresses and phase transformations significantly influence component integrity.

Purpose of the Study:

  • To investigate the influence of scanning patterns and speed on thermal profiles.
  • To analyze phase transformation and residual stress generation in WAAM.
  • To provide insights for controlling WAAM process parameters.

Main Methods:

  • Development of a finite element (FE) numerical model using ABAQUS UMAT.
  • Incorporation of phase evolution and transformation plasticity into the model.
  • Simulation of WAAM deposition with varying scanning strategies and speeds.

Main Results:

  • Scanning patterns significantly affect heat accumulation and cooling rates, influencing residual stress.
  • Out-in scanning patterns result in the highest residual stress.
  • Alternate scanning patterns lead to the lowest residual stress.
  • Increased scan speed reduces peak temperature and accelerates cooling, increasing martensite volume fraction.

Conclusions:

  • Scanning strategy is a critical parameter for mitigating residual stress in WAAM.
  • Scan speed influences thermal profiles and martensite formation.
  • The developed FE model provides a valuable tool for predicting WAAM outcomes.