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Full-Text Articles in Engineering Science and Materials

The Examination Of Stress Corrosion Cracking In High Strength Carbon Steel Through Combined Mechanical-Electrochemical Testing, Jacob Sines Jan 2015

The Examination Of Stress Corrosion Cracking In High Strength Carbon Steel Through Combined Mechanical-Electrochemical Testing, Jacob Sines

Williams Honors College, Honors Research Projects

Through the analysis of materials and environments seen in industry a better understanding of the fundamentals behind degradation mechanisms can be observed. The scope of this project was to better understand the fundamentals behind the degradation of high strength pipeline steels in a lab setting to simulate an environment seen in industry. Specifically the degradation mechanisms of high and nearly neutral pH stress corrosion cracking were examined in environments that simulated oil and gas pipelines buried in soil. Experimentation was carried out utilizing X65 carbon steel specimen, a Gamry potentiostat, a CORTEST proof ring, a CORTEST slow strain rate machine ...


Physical Properties Of Various Conductive Diborides And Their Binaries, Austin Harold Shaw Jan 2015

Physical Properties Of Various Conductive Diborides And Their Binaries, Austin Harold Shaw

Graduate Theses and Dissertations

Hard, wear-resistant materials have potential utility as both coatings and bulk components in wear-prone applications. First-principle calculations performed by other investigators indicated that TaB2 and WB2 could be in the class of ultra-hard materials (hardness > 45 GPa), while MoB2 could be slightly less hard, but still in the "super-hard" range (hardness >30 GPa). However, relatively little empirical work has been done to confirm or refute such ultra-hard/super-hard expectations for the materials, and they have seen essentially no engineering use.

In this study, research was performed to determine whether:

 MoB2, NbB2, TaB2, and WB2 have high hardness.

 These borides have ...