AGING BEHAVIOR OF ALLOY 800H AND ASSOCIATED MECHANICAL PROPERTY CHANGES

摘要

Aging behavior of five different heats of Alloy 800H was investigated in the temperature range 538 to 816 C (1000 to 1500 F) for times up to 8,000 h. Significant age-hardening was observed at low temperatures [i.e., 538, 593 and 649 C (1000, 1100 and 1200 F) in most heats. One of the heats, however, exhibited less hardening. Microstructural changes occurring during aging were evaluated by optical metallography, trans¬mission electron microscopy, and x-ray diffraction.