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Abstract

Investigations carried out within the framework of COST 501 in various laboratories on Alloy 800 degrees C have revealed severe scatter of the creep strength properties of the material in the as-received material condition. The "commercial" quality quenching process applied after solution annealing was considered to be a possible source of this scatter. By varying the quenching rate in a way simulating the quenching procedure used, large differences were observed in the creep behaviour. TEM investigations have shown that the structure can vary widely depending on the cooling procedure. Differences in creep resistance become smaller as the tests proceed because the structural variations gradually disappear. Thus the minimum creep rate, for instance, is found to be affected to a much greater extent than is the creep rupture strength.

Additional information

Authors: GUTTMANN V, JRC PETTEN ESTAB. (THE NETHERLANDS);TIMM J JRC PETTEN ESTAB. (THE NETHERLANDS), JRC PETTEN ESTAB. (THE NETHERLANDS)
Bibliographic Reference: HIGH TEMPERATURE ALLOYS FOR GAS TURBINES, LIEGE (BELGIUM), OCT. 6-9, 1986 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 33010 ORA
Availability: Can be ordered online
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