Search Results - "Demetriou, Marios D."

Shaping metallic glasses by electromagnetic pulsing by Kaltenboeck, Georg, Demetriou, Marios D., Roberts, Scott, Johnson, William L.

“…With damage tolerance rivalling advanced engineering alloys and thermoplastic forming capabilities analogous to conventional plastics, metallic glasses are…”
Get full text

Compositional landscape for glass formation in metal alloys by Na, Jong Hyun, Demetriou, Marios D., Floyd, Michael, Hoff, Andrew, Garrett, Glenn R., Johnson, William L.

“…A high-resolution compositional map of glass-forming ability (GFA) in the Ni–Cr–Nb–P–B system is experimentally determined along various compositional planes…”
Get full text

Beating Crystallization in Glass-Forming Metals by Millisecond Heating and Processing by Johnson, William L., Kaltenboeck, Georg, Demetriou, Marios D., Schramm, Joseph P., Liu, Xiao, Samwer, Konrad, Kim, C. Paul, Hofmann, Douglas C.

“…The development of metal alloys that form glasses at modest cooling rates has stimulated broad scientific and technological interest. However, intervening…”
Get full text

Development of tough, low-density titanium-based bulk metallic glass matrix composites with tensile ductility by Hofmann, Douglas C, Suh, Jin-Yoo, Wiest, Aaron, Lind, Mary-Laura, Demetriou, Marios D, Johnson, William L

“…The mechanical properties of bulk metallic glasses (BMGs) and their composites have been under intense investigation for many years, owing to their unique…”
Get full text

Anelastic to plastic transition in metallic glass-forming liquids by Harmon, John S, Demetriou, Marios D, Johnson, William L, Samwer, Konrad

“…The configurational properties associated with the transition from anelasticity to plasticity in a transiently deforming metallic glass-forming liquid are…”
Get full text

Separating the configurational and vibrational entropy contributions in metallic glasses by Smith, Hillary L., Li, Chen W., Hoff, Andrew, Garrett, Glenn R., Kim, Dennis S., Yang, Fred C., Lucas, Matthew S., Swan-Wood, Tabitha, Lin, J. Y. Y., Stone, M. B., Abernathy, D. L., Demetriou, Marios D., Fultz, B.

“…Glassy materials exist in nature and play a critical role in technology, but key differences between the glass, liquid and crystalline phases are not well…”
Get full text

How the toughness in metallic glasses depends on topological and chemical heterogeneity by An, Qi, Samwer, Konrad, Demetriou, Marios D., Floyd, Michael C., Duggins, Danielle O., Johnson, William L., Goddard, William A.

“…To gain insight into the large toughness variability observed between metallic glasses (MGs), we examine the origin of fracture toughness through bending…”
Get full text

Enhanced fatigue endurance of metallic glasses through a staircase-like fracture mechanism by Gludovatz, Bernd, Demetriou, Marios D., Floyd, Michael, Hohenwarter, Anton, Johnson, William L., Ritchie, Robert O.

“…Bulk-metallic glasses (BMGs) are now candidate materials for structural applications due to their exceptional strength and toughness. However, their fatigue…”
Get full text

Designing color in metallic glass by Na, Jong Hyun, Han, Kyung Hee, Garrett, Glenn R., Launey, Maximilien E., Demetriou, Marios D., Johnson, William L.

“…“Designing” metallic glasses to exhibit properties beyond those offered within the narrow composition ranges where glass formation is possible poses a…”
Get full text

Cooperative shear model for the rheology of glass-forming metallic liquids by Demetriou, Marios D, Harmon, John S, Tao, Min, Duan, Gang, Samwer, Konrad, Johnson, William L

“…A rheological law based on the concept of cooperatively sheared flow zones is presented, in which the effective thermodynamic state variable controlling flow…”
Get full text

Uncovering the flow of metallic glass by Demetriou, Marios D.

“…Plastic yielding of metallic glasses is mediated by strain softening, which promotes localized failure and impairs engineering predictability. Unravelling the…”
Get full text

Amorphous metals for hard-tissue prosthesis by Demetriou, Marios D., Wiest, Aaron, Hofmann, Douglas C., Johnson, William L., Han, Bo, Wolfson, Nikolaj, Wang, Gongyao, Liaw, Peter K.

“…Owing to a unique atomic structure lacking microstructural defects, glassy metals demonstrate certain universal properties that are attractive for load-bearing…”
Get full text

Correlation between fracture surface morphology and toughness in Zr-based bulk metallic glasses by Suh, Jin-Yoo, Dale Conner, R., Paul Kim, C., Demetriou, Marios D., Johnson, William L.

“…Fracture surfaces of Zr-based bulk metallic glasses of various compositions tested in the as-cast and annealed conditions were analyzed using scanning electron…”
Get full text

A damage-tolerant glass by Demetriou, Marios D, Launey, Maximilien E, Garrett, Glenn, Schramm, Joseph P, Hofmann, Douglas C, Johnson, William L, Ritchie, Robert O

“…Owing to a lack of microstructure, glassy materials are inherently strong but brittle, and often demonstrate extreme sensitivity to flaws. Accordingly, their…”
Get full text

Effect of processing on Charpy impact toughness of metallic glass matrix composites by Zachrisson, Carl, Kozachkov, Henry, Roberts, Scott, Kaltenboeck, Georg, Conner, Robert D., Demetriou, Marios D., Johnson, William L., Hofmann, Douglas C.

“…In this study, compact Charpy impact testing was used to investigate the effect of processing history and dendrite morphology of bulk metallic glass matrix…”
Get full text

Designing metallic glass matrix composites with high toughness and tensile ductility by Duan, Gang, Lind, Mary-Laura, Wiest, Aaron, Demetriou, Marios D, Johnson, William L, Suh, Jin-Yoo, Hofmann, Douglas C

“…The selection and design of modern high-performance structural engineering materials is driven by optimizing combinations of mechanical properties such as…”
Get full text

Origin of embrittlement in metallic glasses by Garrett, Glenn R., Demetriou, Marios D., Launey, Maximilien E., Johnson, William L.

“…Owing to their glassy nature, metallic glasses demonstrate a toughness that is extremely sensitive to the frozen-in configurational state. This sensitivity…”
Get full text

Effect of microalloying on the toughness of metallic glasses by Garrett, Glenn R, Demetriou, Marios D, Chen, Jason, Johnson, William L

“…The effect of microalloying on the toughness of Cu-Ti-based metallic glasses is explored. Minor additions of Si and Sn in glass former Cu47Ti34Zr11Ni8 known to…”
Get full text

Accessing thermoplastic processing windows in metallic glasses using rapid capacitive discharge by Kaltenboeck, Georg, Harris, Thomas, Sun, Kerry, Tran, Thomas, Chang, Gregory, Schramm, Joseph P., Demetriou, Marios D., Johnson, William L.

“…The ability of the rapid-capacitive discharge approach to access optimal viscosity ranges in metallic glasses for thermoplastic processing is explored. Using…”
Get full text

An in vivo preclinical study assessing biocompatibility of Pd-based bulk metallic glass by Witek, Lukasz, Vivekanand Nayak, Vasudev, Rodriguez Colon, Ricardo, Torroni, Andrea, Demetriou, Marios D, Coelho, Paulo G

“…The bulk metallic glass (BMG), Pd79Ag3.5P6Si9.5Ge2, has a high fracture toughness and has been found to accommodate post-yield stress, unlike most other BMG…”
Get more information