期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Influence of cyclic frequency on oxidation behavior of K38 superalloy with yttrium additions at 1273 K 被引量:13
1
作者 于萍 王文 王福会 《Journal of Rare Earths》 SCIE EI CAS CSCD 2011年第2期119-123,共5页
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,cycl... 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. 展开更多
关键词 k38 superalloy YTTRIUM cyclic oxidation cyclic frequency rare earths
原文传递
Effect of Ce^+ Ion Implantation upon Oxidation Resistance of Superalloy K38G 被引量:2
2
作者 钱余海 李美栓 +1 位作者 多树旺 赵有明 《Journal of Rare Earths》 SCIE EI CAS CSCD 2005年第1期63-67,共5页
The oxidation behavior (isothermal and cyclic oxidation) of cast superalloy K38G and the effect of Ce^+ ion implantation with dose of 1×10^(17) ions/cm^2 upon its oxidation resistance at 900 and 1000 ℃ in air we... The oxidation behavior (isothermal and cyclic oxidation) of cast superalloy K38G and the effect of Ce^+ ion implantation with dose of 1×10^(17) ions/cm^2 upon its oxidation resistance at 900 and 1000 ℃ in air were investigated. Meanwhile, the influence of Ce^+ implantation on oxidation behavior of K38G with pre-oxide scale at 1000 ℃ in air was compared. The pre-oxidation was performed at 1000 ℃ in static air for 0.25 and 1.5 h, respectively. It is shown that the homogeneous external mixture oxide of rutile TiO_2+Cr_2O_3 and non-continuous internal oxide of Al_2O_3 are formed during the oxidation procedure in all the cases. The isothermal oxidation resistance and the cracking or spallation resistance of superalloy K38G implanted with Ce^+ by both of the two different implantation ways are not improved notably. This may be attributed to the mixed oxide composition characteristics and the blocking effect differences of Ce^+ segregation along the oxide grain boundaries on the transport process for different diffusing ions. 展开更多
关键词 high temperature oxidation oxidation resistance ion implantation superalloy k38G rare earths
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部