Effect of the range of particle sizes on the heat resistance of chrome-nickel alloys

We study the effect of the range of particle sizes in KhN45Yu alloy and 12Kh18N10T and 15Kh25T steels on their heat resistance at temperatures of 800, 1000, and 1200°C in air on a base of up to 1000 h. It is shown that materials with a coarse-grained structure exhibit a much higher oxidation susceptibility than those with a fine-grained structure. For the materials under investigation, the oxidation rates are greater in the stressed state and increase as a result of thermal cycling.Translated from Fiziko-Khimicheskaya Mekhanika Materialov, Vol. 30, No. 5, pp. 45–49, September–October, 1994.