Effects of electrical discharge surface modification of superalloy Haynes 230 with aluminum and molybdenum on oxidation behavior
Effects of electrical discharge surface modification of superalloy Haynes 230 with aluminum and molybdenum on oxidation behavior
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DOI：
10.1016/j.corsci.2007.05.009
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发表时间：
2007-10
影响因子：
8.3
通讯作者：
C. Bai
中科院分区：
文献类型：
--
作者：
C. Bai
研究了放电合金化（EDA）工艺对提高ni基高温合金haynes230耐高温氧化性能的影响。在85年。% Al和15at。% Mo复合电极提供表面合金化材料。采用正极极性合金的EDA试样表面形成富al层，而采用负极极性合金的EDA试样表面形成许多不连续堆积层。正极极性合金试样的抗氧化性优于非合金化高温合金，合金层的有效抗氧化温度可达到1100℃。相反，另一种电极极性为负极合金的EDA试样的抗氧化性甚至比未合金的高温合金更差。
The effects of the electrical discharge alloying (EDA) process on improving the high temperature oxidation resistance of the Ni-based superalloy Haynes 230 have been investigated. The 85at.% Al and 15at.% Mo composite electrode provided the surface alloying materials. An Al-rich layer is produced on the surface of the EDA specimen alloyed with positive electrode polarity, whereas, many discontinuous piled layers are attached to the surface of the EDA superalloy when negative electrode polarity is selected. The oxidation resistance of the specimen alloyed with positive electrode polarity is better than that of the unalloyed superalloy, and the effective temperature of oxidation resistance of the alloyed layer can be achieved to 1100°C. Conversely, the oxidation resistance of the other EDA specimen alloyed with negative electrode polarity is even worse than that of the unalloyed superalloy.