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Bo Whip Masters Thesis Final.pdf (8.65 MB)

ETD Abstract Container

Abstract Header

Effect of Process Parameters on the Surface Roughness and Mechanical Performance of Additively Manufactured Alloy 718

Whip, Bo Ryan
http://rave.ohiolink.edu/etdc/view?acc_num=wright1526993831680976

Abstract Details

2018, Master of Science in Mechanical Engineering (MSME), Wright State University, Mechanical Engineering.
Metal additive manufacturing (AM) is a method to create complex components in a layer-by-layer process. Currently, there is a lack of understanding in the processing-structure-properties-performance relationship, particularly related to defects inherent to the AM process. This work investigates the relationship of process parameters, as-built surface roughness, and mechanical performance for nickel-based superalloy 718 built using laser powder bed fusion. The surface roughness of components built using varied processing parameters was characterized using both nondestructive and destructive measurement techniques. Finite element analysis was used to study the stress concentration on surface profiles. Statistical correlations are presented between contour processing parameters and surface roughness metrics. Results show that destructive measurements are required to expose obstructed features and highly concentrated stress is present on crack-like surface features. The discovered understanding of the surface roughness behavior can be used for further process optimization and to inform the certification and qualification strategy for AM components.
Joy Gockel, Ph.D. (Advisor)
Onome Scott-Emuakpor, Ph.D. (Committee Member)
Craig Baudendistel, Ph.D. (Committee Member)
122 p.
Mechanical Engineering
Additive Manufacturing; AM; Laser powder bed fusion; process parameters; surface roughness; alloy 718; mechanical performance; profile and areal surface roughness measurement techniques; finite element analysis; stress concentration

Recommended Citations

Citations

  • Whip, B. R. (2018). Effect of Process Parameters on the Surface Roughness and Mechanical Performance of Additively Manufactured Alloy 718 [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1526993831680976

    APA Style (7th edition)

  • Whip, Bo. Effect of Process Parameters on the Surface Roughness and Mechanical Performance of Additively Manufactured Alloy 718 . 2018. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1526993831680976.

    MLA Style (8th edition)

  • Whip, Bo. "Effect of Process Parameters on the Surface Roughness and Mechanical Performance of Additively Manufactured Alloy 718 ." Master's thesis, Wright State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1526993831680976

    Chicago Manual of Style (17th edition)

wright1526993831680976
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© 2018, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.