Browsing by Author "Maier, H. J."
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Cyclic deformation response of ultra-fine grained titanium at elevated temperatures
Sajadifar, Seyed Vahid; Yapıcı, Güney Güven; Demler, E.; Krooss, P.; Wegener, T.; Maier, H. J.; Niendorf, T. (Elsevier, 2019-05)This study focuses on the high-temperature cyclic deformation response (CDR) of ultra-fine grained (UFG) titanium of commercial purity (grade 4) processed via equal channel angular extrusion as a severe plastic deformation ... -
Effect of commercial purity levels on the mechanical properties of ultrafine-grained titanium
Purcek, G.; Yapıcı, Güney Güven; Karaman, I.; Maier, H. J. (Elsevier, 2011-03-15)Two grades of commercial purity (CP) titanium (grades 2 and 4) were processed using equal-channel angular extrusion (ECAE) at 300 ◦C and 450 ◦C, respectively. The processing temperatures were the minimum temperatures at ... -
Elevated temperature mechanical characteristics and fracture behavior of a novel beta titanium alloy
Sajadifar, Seyed Vahid; Maier, H. J.; Niendorf, T.; Yapıcı, Güney Güven (MDPI, 2023-02-03)In the present work, the elevated-temperature deformation characteristics and microstructural evolution of a Ti-5V-5Mo-5Cr-4Al alloy in solution-treatment conditions were studied under a tensile load at temperatures in the ... -
Fracture behavior of ultrafine-grained titanium under tension at elevated temperatures
Sajadifar, Seyed Vahid; Maier, H. J.; Yapıcı, Güney Güven (ASME, 2020-10-01)This investigation focused on the deformation response and microstructural changes of severely deformed titanium during post-severe plastic deformation tension, at temperatures of 300–600 °C and at strain rates of 0.001–0.1 ... -
Improvement of the fatigue performance of an ultrafine-grained Nb–Zr alloy by nano-sized precipitates formed by internal oxidation
Niendorf, T.; Maier, H. J.; Canadinc, D.; Yapıcı, Güney Güven; Karaman, I. (Elsevier, 2008-04)The formation of nano-sized precipitates in an ultrafine-grained Nb–Zr alloy was investigated. ZrO2 precipitates induced by internal oxidation during heat treatment at low homologous temperatures significantly intensify ... -
Mechanical and wear properties of ultrafine-grained pure Ti produced by multi-pass equal-channel angular extrusion
Purcek, G.; Saray, O.; Kul, O.; Yapıcı, Güney Güven; Haouaoui, M.; Maier, H. J. (Elsevier, 2009-08-20)In this study, pure grade 2 Ti was processed via equal-channel angular extrusion (ECAE) for 8 and 12 passes following route-E at 300 °C. After processing, the microstructural evolution, tensile properties and wear behavior ...
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