刘莹莹,姚泽坤,郭鸿镇

• 1:西北工业大学材料学院
• 2:西安建筑科技大学冶金工程学院

摘要(Abstract)：

研究了Ti3Al基合金与TC11钛合金采用不同参数的电子束焊接的双合金件,经近等温锻造和热处理后,近等温锻造工艺参数对合金元素在焊接界面上扩散的影响。结果表明,应变速率和变形量对不同参数焊接的双合金件焊接界面合金元素扩散的影响类似,均随着应变速率的降低及变形量的增大扩散更充分。但当变形20%时,合金元素以沿晶界扩散的管道机制为主;当变形40%时,扩散以晶间扩散机制为主。此外,Ti元素在焊缝区的反常扩散是由于Ti原子的点阵位置被从Ti3Al侧扩散而来的Nb原子所占据,被替代的Ti原子从DO19六方有序结构中扩散出来聚集所造成。

关键词(KeyWords)： Ti3Al;TC11;焊接界面;应变速率;变形量;元素扩散

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50775187)

作者(Author): 刘莹莹,姚泽坤,郭鸿镇

DOI: 10.13289/j.issn.1009-6264.2010.01.022

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