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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 6    December 2003

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Cavitation erosion behavior of nickel-aluminum bronze weldment
LI Xiao-ya(李小亚)1, 2, 3, YAN Yong-gui(闫永贵)2
XU Zhen-ming(许振明)1, LI Jian-guo(李建国)1

1. State Key Laboratory of Metal Matrix Composites, 
Shanghai Jiaotong University, Shanghai 200030, China;
2. State Key Laboratory for Marine Corrosion and Protection, Qingdao Branch, Luoyang Ship Materials Research Institute, Qingdao 266071, China;
 3. College of Materials Science and Engineering,
 Hebei University of Science and Technology, Shijiazhuang 050054, China

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.

 

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

ISSN 1672-7029
CN 43-1423/U

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