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Wesley Eidt Masters Thesis.pdf (5.42 MB)

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Defect Modeling and Vibration-Based Bending Fatigue of Additively Manufactured Inconel 718

Eidt, Wesley Earl
http://orcid.org/0000-0002-2468-7818
http://rave.ohiolink.edu/etdc/view?acc_num=wright1590502861855386

Abstract Details

2020, Master of Science in Mechanical Engineering (MSME), Wright State University, Mechanical Engineering.
Additive manufacturing (AM) is convenient for building components with complex features. However, the long-term integrity of these components is uncertain, since AM parts have defects such as pores and rough surfaces. In this work, an analytical model was developed to determine the impact of defects, and a novel bending fatigue test was used to determine the fatigue life of channeled specimens. The analytical model, based off the theory of critical distances, investigates coupled pores and predicts their potential for fatigue failure. This resulted in a maximum allowable pore size and spacing recommendation for coupled defects. Additionally, specimens with through channels built using laser powder bed fusion were tested in high-cycle vibration-based bending fatigue. The resultant S-N curve and fractography studies revealed similar performance between the channeled specimens and the solid specimens. This research serves to increase understanding of additive defects and their influence on the fatigue life of AM components.
Joy Gockel, Ph.D. (Advisor)
Onome Scott-Emuakpor, Ph.D. (Committee Member)
Nathan Klingbeil, Ph.D. (Committee Member)
118 p.
Mechanical Engineering
additive manufacturing; fatigue

Recommended Citations

Citations

  • Eidt, W. E. (2020). Defect Modeling and Vibration-Based Bending Fatigue of Additively Manufactured Inconel 718 [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1590502861855386

    APA Style (7th edition)

  • Eidt, Wesley. Defect Modeling and Vibration-Based Bending Fatigue of Additively Manufactured Inconel 718. 2020. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1590502861855386.

    MLA Style (8th edition)

  • Eidt, Wesley. "Defect Modeling and Vibration-Based Bending Fatigue of Additively Manufactured Inconel 718." Master's thesis, Wright State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wright1590502861855386

    Chicago Manual of Style (17th edition)

wright1590502861855386
251
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This open access ETD is published by Wright State University and OhioLINK.