Mechanisms of the Effect of Heating on Properties of AK4-1ch and AK4-2ch Alloy Semiproducts
Quantitative mechanisms of loss of strength due to long-term heating during overageing and their use for accelerated evaluation of the effect of long-term holding at an elevated temperature on a combination of properties of material (AK4-2ch alloy semiproducts is shown for illustration) are discussed. It is shown that it is necessary to determine crack resistance characteristics of the high-temperature alloy in the state of maximum allowable loss of strength to evaluate its serviceability by the end of service life.