Cavitation erosion behavior of nickel-aluminum bronze weldment

来源期刊：中国有色金属学报(英文版)2003年第6期

论文作者：李小亚 闫永贵 许振明 李建国

文章页码：1317 - 1324

Key words：NAB; weldment; tungsten inert gas welding(TIG); cavitation erosion

Abstract: Cavitation erosion behavior of nickel-aluminum bronze(NAB) weldment in 3.5% NaCl aqueous solution was studied by magnetostrictive vibratory device for cavitation erosion. The results show that cavitation erosion resistance of the weld zone(WZ) of the weldment is superior to that of the base metal. SEM observation of eroded specimens reveals that the phases undergoing selective attack by the stress of cavitation erosion at the early stage of cavitation erosion are: martensite in the WZ, α phase in the heat-affected zone(HAZ) and eutectoidal phase in the base metal; the microcracks causing cavitation damage initiate at the phase boundaries.