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Influences of deposition strategies on thermo-mechanical characteristics of a multilayer part deposited by a wire feeding type DED process

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Abstract

Variation in process parameters and deposition strategies has produced different thermo-mechanical characteristics in a part fabricated by a wire feeding type directed energy deposition (DED) process. The purpose of this paper is to select a proper deposition strategy to fabricate a straight wall part using a wire feeding type DED process. The deposition strategies include different deposition directions, deposition patterns and interpass time. In order to investigate the influences of deposition strategies on thermo-mechanical characteristics of fabricated part, three-dimensional finite element analyses (FEAs) have been proposed. A volumetric heat flux has been applied to simulate the transient heat transfer phenomena of the DED process. Influences of different deposition strategies on thermo-mechanical characteristics of fabricated part have been discussed. From the result of residual stress distribution, an appropriate deposition strategy has been selected for the multi-layer deposition. Results of FEAs have been verified through comparison of vertical displacements between estimated results from FEAs and those of experiments.

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Acknowledgments

This study was supported by research fund from Chosun University, 2018.

Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Chosun University, Gwangju, 61452, Korea

    Bih Lii Chua & Dong-Gyu Ahn

  2. Department of Nano-Convergence Mechanical Systems, Korea Institute of Machinery and Materials, Daejeon, 34103, Korea

    Jae-Gu Kim

Authors
  1. Bih Lii Chua
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  2. Dong-Gyu Ahn
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  3. Jae-Gu Kim
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Corresponding author

Correspondence to Dong-Gyu Ahn.

Additional information

This paper was presented at ICMDT 2019, Shiroyama Hotel, Kagoshima, Japan, April 24-27, 2019. Recommended by Guest Editor Haedo Jeong.

Bih Lii Chua received his B.S. and M.S. degrees from Universiti Malaysia Sabah, Malaysia in 2004 and 2008, respectively. He is currently pursuing his Ph.D. in Chosun University, Korea. His research interests are modeling and simulation of metal additive manufacturing processes using laser and electron beam.

Dong-Gyu Ahn received his B.S. degree from the Busan National University, Korea in 1992. He then received his M.S. and Ph.D. degrees from KAIST, Korea in 1994 and 2002, respectively. Dr. Ahn is currently a Professor at the Department of Mechanical Engineering, Chosun University, Korea. Dr. Ahn's research interests include development and application of 3D printing technology, rapid manufacturing, lightweight sandwich plate, and mold and die.

Jae-Gu Kim received his B.S. and M.S. degrees from Chonbuk National University, Korea in 1992 and 1994, respectively. He then received his Ph.D. degree from KAIST, Korea in 2007. Dr. Kim is currently a Principal Researcher at the Korea Institute of Machinery and Materials, Korea. Dr. Kim's research interests include laser micro machining and laser-wire additive manufacturing process.

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Chua, B.L., Ahn, DG. & Kim, JG. Influences of deposition strategies on thermo-mechanical characteristics of a multilayer part deposited by a wire feeding type DED process. J Mech Sci Technol 33, 5615–5622 (2019). https://doi.org/10.1007/s12206-019-1102-7

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  • DOI: https://doi.org/10.1007/s12206-019-1102-7

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