888 research outputs found
High temperature fatigue characteristics of P/M and hot-forged W-Re and TZM for X-ray target of CT scanner
The fatigue strengths at 1000 °C of layered W-Re/TZM, bulk W-Re and bulk TZM for x-ray target materials were successfully evaluated under load-controlled four-point bending by introducing a fatigue failure criterion as twotimes increase of initial compliance. The obtained fatigue strengths at 1000 °C for layered W-Re/TZM and bulk WRe were similar and 280 MPa and 290 MPa at 106 cycles, respectively, while that of bulk TZM was 200 MPa. During fatigue loading at 1000 °C, dominant fatigue damage would be multiple intergranular crack nucleation and propagation, which would induce the increase of compliance. The reasonability of the fatigue failure criterion was confirmed by the fatigue process observations and the results of room temperature fatigue tests of the specimens tested at 1000 °C up to the cycles corresponding to the fatigue failure criterion
Kinetics of Activation of Nicotinamide Adenine Dinucleotide Kinase by Phytochrome—Far Red-absorbing Form
Synthesis and Complexation of an Optically Active Aza-Crown Ether (Commemoration Issue Dedicated to Professor Yuzo Inouye on the Occasion of his Retirement)
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