Browsing by Author "Wegener, T."
Now showing items 1-6 of 6
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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 friction stir processing on the fatigue performance of AZ31 magnesium alloy
Yapıcı, Güney Güven; Sajadifar, S. V.; Ghobadlou, Ali Hosseinzadeh; Wegener, T.; Sobrero, C.; Engelhardt, A.; Niendorf, T. (Wiley, 2023-05)Herein, the cyclic mechanical behavior of AZ31 magnesium alloy after multipass friction stir processing (FSP) is investigated up to the very high-cycle fatigue (VHCF) regime. The grain refinement and texture evolution after ... -
Effect of grain size on the very high cycle fatigue behavior and notch sensitivity of titanium
Sajadifar, Seyed Vahid; Wegener, T.; Yapıcı, Güney Güven; Niendorf, T. (Elsevier, 2019-12)The very high-cycle fatigue performances of coarse-grained and ultrafine-grained titanium samples with different geometries at ambient temperature and various stress amplitudes were investigated. Severe plastic deformation ... -
On the friction stir processing of additive-manufactured 316L stainless steel
Sajadifar, S. V.; Ghobadlou, Ali Hosseınzadeh; Richter, J.; Krochmal, M.; Wegener, T.; Bolender, A.; Heidarzadeh, A.; Niendorf, T.; Yapıcı, Güney Güven (Wiley, 2022-10)The novel combination of friction stir processing (FSP) and additive manufacturing (AM) is studied herein. Laser-based powder bed fusion of metals (PBF-LB/M) is used to establish 316 L stainless steel with a bimodal ... -
On the low-cycle fatigue behavior of a multi-phase high entropy alloy with enhanced plasticity
Radi, Amin; Sajadifar, S.; Seyedmohammadi, Seyedveghar; Krochmal, M.; Bolender, A.; Wegener, T.; Niendorf, T.; Yapıcı, Güney Güven (Elsevier, 2023-08)A multi-phase non-equiatomic FeCrNiMnCo high entropy alloy (HEA) was fabricated using vacuum induction melting. Thermo-mechanical treatments consisting of cold rolling and annealing at 750 °C and 850 °C were employed to ... -
Severe plastic deformation as a processing tool for strengthening of additive manufactured alloys
Ghobadlou, Ali Hosseinzadeh; Radi, Amin; Richter, J.; Wegener, T.; Sajadifar, S. V.; Niendorf, T.; Yapıcı, Güney Güven (Elsevier, 2021-08)For the first time, the novel combination of multi-pass equal channel angular extrusion/pressing (ECAE/P) and selective laser melting (SLM) was investigated. Herein, four passes of ECAP via route Bc at 150 °C were applied ...
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