Cavitation erosion behavior of GH 4738 nickel-based superalloy
Cavitation erosion behavior of GH 4738 nickel-based superalloy
复制标题
GH 4738镍基高温合金的空蚀行为
DOI：
10.1016/j.triboint.2020.106833
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发表时间：
2021-04-01
影响因子：
6.2
通讯作者：
Zhang, Yongzhen
中科院分区：
文献类型：
--
作者：
Liu, Qi;Li, Zhen;Zhang, Yongzhen
空蚀是磨损损伤的一种形式，降低了航空航天、电力、核工业等部件的性能和寿命。利用超声振动装置研究了GH4738镍基高温合金的空蚀行为，并与Inconel601合金进行了比较。结果表明，GH 4738比Inconel 601具有更好的抗空蚀性能。GH 4738的腐蚀表面存在选择性空蚀和空化诱导的纳米析出物。通过沉淀形成的气泡崩塌吸收能量，以及沉淀的钉扎效应，可以减缓材料的冲蚀损伤，这将有助于理解沉淀对材料抗空蚀性能的影响。
Cavitation erosion is a form of wear damage, and reduces the performance and lifetime of the components that used in aerospace, power and nuclear industries, etc. The cavitation erosion behavior of GH 4738 nickel-based superalloy was investigated using an ultrasonic vibratory device and compared with that of Inconel 601 alloy. The results show that GH 4738 exhibited better cavitation erosion resistance than Inconel 601. The selective cavitation erosion and cavitation-induced nanometer-scaled precipitates were found on the eroded surface of GH 4738. The erosion damage might be slowed down through the bubbles collapse energy absorption by the formation of precipitates and the pinning effect of precipitates, which will be helpful to understand the effect of precipitates on materials cavitation erosion resistance.