Person
Güven Kurtuldu
This person is no longer with EPFL
Related publications (14)
Additive manufacturing of a precious bulk metallic glass
Roland Logé, Jamasp Jhabvala, Antonia Neels, Annapaola Parrilli, Güven Kurtuldu, Navid Sohrabi
For the first time, a high-density amorphous and crack-free bulk metallic glass (BMG) based on a precious metal (PdCuNiP) was produced via additive manufacturing (AM). Laser powder-bed fusion (LPBF) was used for the fabrication of the samples, and led to a ...
2021Solidification of Metallic Alloys: Does the Structure of the Liquid Matter?
In 1952, Frank (Proc R Soc Lond Ser-Math Phys Sci 215:43-46, 1952) already postulated that Icosahedral Short Range Order (ISRO) of atoms in the liquid could possibly explain the large nucleation undercoolings measured in metallic alloys by Turnbull and Fis ...
SPRINGER2020Structured nanoscale metallic glass fibres with extreme aspect ratios
Stéphanie Lacour, Grégoire Courtine, Vasiliki Tileli, Fabien Sorin, Jordan Squair, Nicholas David James, Wei Yan, Yunpeng Qu, Dang Tùng Nguyen, Güven Kurtuldu, Reinis Ignatans, Giuseppe Schiavone, Inès Richard
Micro- and nanoscale metallic glasses offer exciting opportunities for both fundamental research and applications in healthcare, micro-engineering, optics and electronics. The scientific and technological challenges associated with the fabrication and util ...
NATURE PUBLISHING GROUP2020Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusion
Roland Logé, Steven Van Petegem, Jamasp Jhabvala, Antonia Neels, Efthymios Polatidis, Annapaola Parrilli, Güven Kurtuldu, Navid Sohrabi
Bulk metallic glasses (BMGs) are high-strength, highly elastic materials due to their disordered atomic structure. Because BMGs require sufficiently high cooling rates to bypass crystallization, laser-based additive manufacturing (AM) methods have recently ...
2020Influence of Minor Cr-Additions to the Growth of Columnar Dendrites in Al-Zn Alloys: Influence of Icosahedral Short Range Order in the Liquid
The effect of minute Cr additions on dendritic growth directions in Al-20 wt pct Zn alloy has been investigated. As first evidenced by Gonzales and Rappaz (Metall Mater Trans A 37:2797-2806, 2006) Al-Zn alloys exhibit a Dendrite Orientation Transition (DOT ...
SPRINGER2019Influence of icosahedral short range order on diffusion in liquids: A study on Al-Zn-Cr alloys
It has been shown recently that minute additions of Cr in Al-Zn alloys refine the solidified grain structure and induce multiply-twinned grains which can only be explained if the icosahedral symmetry is considered (Kurtuldu et al., 2013). It has been sugge ...
Elsevier2016Quasicrystal-Enhanced Nucleation During the Solidification of fcc Metallic Alloys: A Tentative Thermodynamic Approach
short communication ...
Springer2016Measurement of Mechanical Coherency Temperature and Solid Volume Fraction in Al-Zn Alloys Using In Situ X-ray Diffraction During Casting
Jean-Marie Drezet, Güven Kurtuldu, Bastien Gilbert Pierre Mireux
During solidification of metallic alloys, coalescence leads to the formation of solid bridges between grains or grain clusters when both solid and liquid phases are percolated. As such, it represents a key transition with respect to the mechanical behavior ...
Springer Verlag2015In situ X-ray Diffraction during Casting: Study of Hot Tearing in Al-Zn alloys
Jean-Marie Drezet, Güven Kurtuldu, Bastien Gilbert Pierre Mireux
During solidification of metallic alloys, coalescence corresponds to the formation of solid bridges between grains when both solid and liquid phases are percolated. As such, it represents a key transition with respect to the mechanical behaviour of solidif ...
Trans Tech Publications Switzerland2015Peritectic reaction on the Al-rich side of Al-Cr system
A long lasting controversy on the nature of the reaction between liquid, Al and Al45Cr7 has been ended by planar front solidification experiments of Al-Cr alloy in a Bridgman furnace. Cr depletion in the liquid ahead of the quenched planar interface proves ...
Elsevier2015