Evaluation of the reliability of brazed or soldered joints at high temperatures during their entire service life is necessary for many applications: from jet engines to fuel cells and hydrogen storage systems. The service life of these products varies greatly: from 6000 hours for some jet engines to 300 years for power station aggregates. Therefore, full-time creep tests are not possible in laboratory conditions - extrapolation of short-term tests for expected service life is always used. However, the practice of hot testing of brazed or soldered joints has shown the presence of two problems with these tests: (1) large scatter in measured values of rupture stress over time and (2) excessive duration of the hot tests (even testing one sample for 200 hours takes more than a week).
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