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High Strain-Rate Compression Behavior of a Zr-based Bulk Metallic Glass

Sunny, George Padayatil

Abstract Details

2008, Master of Sciences (Engineering), Case Western Reserve University, Mechanical Engineering.
High strain-rate tests were performed on LM-1 using a Split-Hopkinson Pressure Bar (SHPB) to investigate effects of L/D ratio and annealing. An ultra high-speed camera was also employed to record the deformation and failure processes of LM-1. The as-cast (i.e. amorphous) specimens exhibited a reduction in peak stress with reduced L/D ratio and failure at the specimen-insert interface, indicative of stress concentrations due to the difference in the specimen and insert diameters, while the annealed specimens exhibited extensive fragmentation. The stress concentrations in the specimen motivated simulations using LS-DYNA to design new inserts. A tapered insert design was chosen to reduce stress concentrations, and as-cast and annealed specimens were tested. Strain gages were also attached to as-cast specimens to determine the elastic stress-strain response. As-cast and annealed specimens with tapered inserts exhibit failure in the gage section, while the strain gages recorded no reduction in peak stress with reduced L/D.
Vikas Prakash (Committee Co-Chair)
John Lewandowski (Committee Co-Chair)
Dwight Davy (Other)

Recommended Citations

Citations

  • Sunny, G. P. (2008). High Strain-Rate Compression Behavior of a Zr-based Bulk Metallic Glass [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1190750537

    APA Style (7th edition)

  • Sunny, George. High Strain-Rate Compression Behavior of a Zr-based Bulk Metallic Glass. 2008. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1190750537.

    MLA Style (8th edition)

  • Sunny, George. "High Strain-Rate Compression Behavior of a Zr-based Bulk Metallic Glass." Master's thesis, Case Western Reserve University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1190750537

    Chicago Manual of Style (17th edition)