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THESIS_CHIGOZIE_N_OBIDIGBO.pdf (5.61 MB)

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A Numerical and Experimental Investigation of Steady-State and Transient Melt Pool Dimensions in Additive Manufacturing of Invar 36

Obidigbo, Chigozie Nwachukwu
http://rave.ohiolink.edu/etdc/view?acc_num=wright1503493366168339

Abstract Details

2017, Master of Science in Mechanical Engineering (MSME), Wright State University, Mechanical Engineering.
The use of additive manufacturing (AM) in tooling enables low production components to be fabricated with lower costs, reduced waste, increased design flexibility and reduced lead time. Invar 36 is a popular metal tooling material known for its low coefficient of thermal expansion. This work uses thermal finite element (FE) modeling as a tool to determine the feasibility of using Invar 36 in AM and to investigate the transient effect from common scanning strategies. Results show that the steady-state melt pool dimensions behave similar to traditional AM materials for varying process parameters. Transient results show that the melt pool response is dependent on processing parameters. Single and multiple pass experiments were performed to compare the modeling results and determine additional effects caused by repeated scans. Results show that Invar 36 is a suitable material for use in AM, which will enable rapid tooling for composite structures.
Joy Gockel, Ph.D. (Advisor)
Ha-Rok Bae, Ph.D. (Committee Member)
Ahsan Mian, Ph.D. (Committee Member)
101 p.
Mechanical Engineering
Numerical simulation; Additive Manufacturing Process

Recommended Citations

Citations

  • Obidigbo, C. N. (2017). A Numerical and Experimental Investigation of Steady-State and Transient Melt Pool Dimensions in Additive Manufacturing of Invar 36 [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1503493366168339

    APA Style (7th edition)

  • Obidigbo, Chigozie. A Numerical and Experimental Investigation of Steady-State and Transient Melt Pool Dimensions in Additive Manufacturing of Invar 36. 2017. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1503493366168339.

    MLA Style (8th edition)

  • Obidigbo, Chigozie. "A Numerical and Experimental Investigation of Steady-State and Transient Melt Pool Dimensions in Additive Manufacturing of Invar 36." Master's thesis, Wright State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1503493366168339

    Chicago Manual of Style (17th edition)

wright1503493366168339
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© 2017, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.