Influence of cyclic frequency on oxidation behavior of K38 superalloy with yttrium additions at 1273 K
来源期刊：Journal of Rare Earths2011年第2期
论文作者：于萍 王文 王福会
文章页码：119 - 123
摘 要：Cyclic oxidation test is a fundamental method to assess lifetime of materials in high temperature environment.Cycle length or cyclic frequency is one important variable in cyclic oxidation testing.In present work,cyclic oxidation tests were performed on cast K38 alloys with 0 wt.%,0.1 wt.%,and 0.5 wt.% yttrium additions at 1 273 K respectively.Two cyclic frequencies were used to investigate the influence of cycle length （1 h vs.20 h） on the high temperature oxidation behavior of superalloy.The results showed that the degradation of cast K38 alloy critically was dependent on the cyclic frequency.The yttrium addition was beneficial to reducing scale-growth rate,improving the scale adhesion and stress releasing,thereby increased the spallation resistance.It could be drawn that the effect of cyclic frequency was highly dependent on the scale adherence to the substrate.
于萍1,2，王文2，王福会2
1. Shenyang University of Chemical Technology2. State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences
摘 要：Cyclic oxidation test is a fundamental method to assess lifetime of materials in high temperature environment.Cycle length or cyclic frequency is one important variable in cyclic oxidation testing.In present work,cyclic oxidation tests were performed on cast K38 alloys with 0 wt.%,0.1 wt.%,and 0.5 wt.% yttrium additions at 1 273 K respectively.Two cyclic frequencies were used to investigate the influence of cycle length （1 h vs.20 h） on the high temperature oxidation behavior of superalloy.The results showed that the degradation of cast K38 alloy critically was dependent on the cyclic frequency.The yttrium addition was beneficial to reducing scale-growth rate,improving the scale adhesion and stress releasing,thereby increased the spallation resistance.It could be drawn that the effect of cyclic frequency was highly dependent on the scale adherence to the substrate.
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