http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
On Temperature Rise Within the Shear Bands in Bulk Metallic Glasses
A. I. Bazlov,A. Yu. Churyumov,M. Buchet,D. V. Louzguine-Luzgin 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.3
Room temperature deformation process in a bulk metallic glassy sample was studied by using a hydraulic thermomechanicalsimulator. The temperature rise during each separate shear band propagation event was measured with a high data acquisitionfrequency by a thermocouple welded to the sample. Calculation showed that when propagation of the well developedshear bands takes place along the entire sample the temperature inside the shear band should be close to the glass-transitiontemperature. It was also possible to resolve the temporal stress distribution and a double-stage character of stress drops wasalso observed. The obtained results are compared with the literature data obtained by infrared camera measurements andthe results of fi nite elements modeling.
Microstructure and Properties of Novel Heat Resistant Al–Ce–Cu Alloy for Additive Manufacturing
D. R. Manca,A. Yu. Churyumov,A. V. Pozdniakov,A. S. Prosviryakov,D. K. Ryabov,A. Yu. Krokhin,V. A. Korolev,D. K. Daubarayte 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.3
The microstructure and properties of the novel heat resistant Al–3Ce–7Cu alloy produced by selective laser melting wereinvestigated. Fine Al11Ce3and Al6.5CeCu6.5eutectic phases were found in the microstructure. Annealing at temperatures inthe 250–400 °C range leads to a decrease in the hardness. Hardness has larger values after annealing at 350 and 400 °C thanat 250 °C due to the precipitation of nanosized particles. The low hardness after quenching and aging at 190 °C is causedby quench stress relief and the absence of aging hardening because of poor solid solution. The as-printed yield strength,ultimate tensile strength and elongation are 274 MPa, 456 MPa and 4.4%, respectively. High mechanical properties of theAl–3Ce–7Cu alloy were demonstrated by high temperature tension and compression tests.