Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Robert Zarnetta"'
Publikováno v:
Intermetallics. 26:98-109
The shape memory properties of the complete Ti–Ni–Cu thin film system were investigated using combinatorial methods, i.e. fabrication and high-throughput characterization of thin film materials libraries. Thin film composition spreads were deposi
Publikováno v:
Materials Science and Engineering: A. 528:6552-6557
Hardness and Young's moduli values for TixNi90−xCu10 (37 at.% < x < 67 at.%) thin films from a continuous composition spread type materials library, annealed at 500 °C for 1 h, were determined at room temperature (martensitic state) and 80 °C (au
Publikováno v:
Scripta Materialia. 64:1047-1050
(Ti/Ni/W)n multilayer films were annealed to form a two-phase (B2-TiNi and β-W) system. Grain sizes extracted from X-ray diffraction profiles of annealed films revealed that B2-TiNi decreases with increasing W, due to the immiscible W layers obstruc
Publikováno v:
Acta Materialia. 59:3267-3275
The shape memory thin film system Ti–Ni–Hf was investigated with regard to its structural, phase transformation and functional fatigue properties by means of combinatorial and high-throughput methods. Temperature-dependent resistance measurements
Autor:
Sigurd Thienhaus, Alfred Ludwig, Dennis König, Robert Zarnetta, Pio John S. Buenconsejo, Alan Savan
Publikováno v:
Advanced Functional Materials. 21:113-118
The Ti–Ni–W two-phase shape memory alloy (SMA) thin film system is presented as a prototype for new SMAs with tailorable thermal transformation hysteresis (ΔT). The concept is to combine the SMA TiNi with almost insoluble W to create the two-pha
Autor:
E.J. Payton, E. A. Prokofiev, Dmitry Gunderov, Robert Zarnetta, Ruslan Z. Valiev, Juri Burow, Jan Frenzel, Gunther Eggeler
Publikováno v:
Advanced Engineering Materials. 12:747-753
Severe plastic deformation (SPD) processes, such as equal channel angular pressing (ECAP) and high pressure torsion (HPT), are successfully employed to produce ultra fine grain (UFG) and nanocrystalline (NC) microstructures in a Ti-50.7at% Ni shape m
Autor:
Richard D. James, Hayo Brunken, Yong S. Chu, Yasubumi Furuya, Alfred Ludwig, Mustafa Rahim, Marcus L. Young, Jan Frenzel, Gunther Eggeler, Robert Zarnetta, Burkhard Maaß, Vijay Srivastava, Sigurd Thienhaus, Ryota Takahashi, Ichiro Takeuchi, Alan Savan
Publikováno v:
Advanced Functional Materials. 20:1917-1923
Improving the functional stability of shape memory alloys (SMAs), which undergo a reversible martensitic transformation, is critical for their applications and remains a central research theme driving advances in shape memory technology. By using a t
Autor:
Jan Frenzel, Gunther Eggeler, Athina E. Markaki, Janine Pfetzing-Micklich, T.W. Clyne, Robert Zarnetta, Martin F.-X. Wagner, Jeffrey M. Wheeler
Publikováno v:
Advanced Engineering Materials. 12:13-19
Nanoindentation is a suitable tool for characterizing the local mechanical properties of shape memory alloys (SMA) and to study their pseudoelastic behavior. There is a special interest in indenting with different indenter tips (as not all tips are a
Autor:
Jan Frenzel, Gunther Eggeler, Alfred Ludwig, Robert Zarnetta, Christiane Zamponi, Dennis König, A. Aghajani
Publikováno v:
Acta Materialia. 57:4169-4177
The combinatorial fabrication and high-throughput characterization of a Ti–Ni–Cu shape memory thin film composition spread led to the discovery of the shape memory alloy Ti 39 Ni 45 Cu 16 , which exhibits a single B2 → R-phase transformation ab
Publikováno v:
Scripta Materialia. 60:352-355
Ti-Ni-Pd thin film samples were investigated by analytical transmission electron microscopy. For Ti 50+x Ni 35-x Pd 15 (x