摘要
采用OM,XRD,EPMA,TEM分析了电子束焊接Ti-6Al-4V焊缝区域的精细组织结构特征。结果表明接头区域组织形态由基体等轴晶向焊缝柱状形态演化,焊缝区域呈现单一α′网篮状组织,TEM板束形态呈多向分布,焊缝区域的位错分布密度与基体母材相比呈现出减小的趋势,且熔合线附近存在V,Fe等β稳定元素浓度起伏现象。
Microstructure characteristic in fusion zone of electron beam welding of Ti-6Al-4V was studied by means of OM, XRD, EP-MA and TEM. The results indicated that crystallizing morphology of fusion zone was evolved into columnar crystals from equiaxed grain in base metal. Only α′ phase presenting basket-weave microstructure was produced. Lath of fine microstructure in fusion zone present multi-directional distribution. Some β stabilized element such as Fe, V concentration distribution fluctuation occurred nearby fusion line. Dislocation density in fusion zone obviously decreased than that of base metal.
出处
《航空材料学报》
EI
CAS
CSCD
2005年第3期21-24,共4页
Journal of Aeronautical Materials
基金
国家"863"计划资助项目(No.2002AA724040)
