铝青铜焊接热影响区的空蚀形貌特征  

Morphology characteristics of the heat-affected zone of aluminum bronze welding after cavitation erosion

作　　者：李小亚[1] 闫永贵[1] 马力[1] 许振明[2] 李建国[2] 

机构地区：[1]海洋腐蚀与防护国防科技重点实验室洛阳船舶材料研究所青岛分部,山东青岛266071 [2]上海交通大学复合材料国家重点实验室,上海200030

出　　处：《电子显微学报》2004年第3期257-260,共4页Journal of Chinese Electron Microscopy Society

基　　金：国防基金资助项目(No.11H1004).

摘　　要：为了解铝青铜焊接热影响区(HAZ)的空蚀行为,对镍铝青铜焊接热影响区的空蚀形貌进行了扫描电镜(SEM)分析。结果表明:在空蚀初期,α相遭到选择性优先空蚀破坏;空蚀破坏呈现不均匀性,局部区域出现大的空蚀坑。热影响区空蚀破坏的机制是微坑的产生、长大、合并,进而形成裂纹,裂纹扩展最终导致失质。SEM analysis of nickel aluminum bronze (NAB) weldment samples after cavitation erosion was carried to understand cavitation erosion behavior of the heat-affected zone (HAZ) of the weldment. Experimental results showed that at the early stage of cavitation erosion the alpha phases were selectively attacked. Cavitation damage was uneven and cavities appeared in local places. The cavitation damage mechanism is that microvoids form, grow and link into microcracks and the propagation of the microcracks leads to mass loss.

关 键 词：扫描电镜分析 空蚀行为 钨极氩弧焊 镍铝青铜 焊接热影响区 

分 类 号：TG401[金属学及工艺—焊接]