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Influence of Strain Rate Sensitivity (SRS) of Additive Manufactured Ti-6Al-4V on Nanoscale Wear Resistance

Pelini, Angelo
http://rave.ohiolink.edu/etdc/view?acc_num=ysu1516980302644593

Abstract Details

2017, Master of Science in Engineering, Youngstown State University, Department of Mechanical, Industrial and Manufacturing Engineering.
The widespread use of titanium alloys such as Ti-6Al-4V and the expense of manufacturing it, leads to a need of new manufacturing processes such as the innovative additive manufacturing technology of today. Ti-6Al-4V was studied in a series of experiments to determine the strain rate sensitivity of the material that was manufactured by conventional, mill-annealing, and additive manufacturing processes of electron beam melting and selective laser melting. Due to the high thermal cycles required in the hatching processes involved in building each layer of the part, and the rapid cooling, the grain size of dual phase titanium becomes very fine. Grain structure of each manufacturing process was studied and compared with the results. Constant rate of loading tests were performed on all three samples. Then the samples were tested in a multiple loading test where it was loaded at increasing maximum peak loads four times. The application of run-in wear can cause high friction where single asperity contact causes wear. Because of this, progressive scratch tests were performed at different loading rates and sliding speeds to compare to the indentation tests. Results show that grain size and structure influence the strain rate sensitivity as well as the scratch loading rate sensitivity. The results also show that the strain rate was affected by the fatigue induced by the multiple peak loads involved in the second test.
Jae Joong Ryu, PhD (Advisor)
Hazel Marie, PhD (Committee Member)
Jason Walker, PhD (Committee Member)
101 p.
Materials Science; Mechanical Engineering
Strain rate sensitivity; Ti-6Al-4V; Nano wear; Additive manufacturing

Recommended Citations

Citations

  • Pelini, A. (2017). Influence of Strain Rate Sensitivity (SRS) of Additive Manufactured Ti-6Al-4V on Nanoscale Wear Resistance [Master's thesis, Youngstown State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1516980302644593

    APA Style (7th edition)

  • Pelini, Angelo. Influence of Strain Rate Sensitivity (SRS) of Additive Manufactured Ti-6Al-4V on Nanoscale Wear Resistance. 2017. Youngstown State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ysu1516980302644593.

    MLA Style (8th edition)

  • Pelini, Angelo. "Influence of Strain Rate Sensitivity (SRS) of Additive Manufactured Ti-6Al-4V on Nanoscale Wear Resistance." Master's thesis, Youngstown State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1516980302644593

    Chicago Manual of Style (17th edition)

ysu1516980302644593
769
© 2017, all rights reserved.
This open access ETD is published by Youngstown State University and OhioLINK.