摘要
采用超声C扫描法对TiAl和40Cr扩散焊界面进行了检测,分别研究了界面回波幅度平均值和标准差与接头抗剪强度之间的关系,并讨论了焊接温度和试样表面粗糙度对上述关系的影响及界面气隙长度与回波幅度的关系。结果表明,当试样表面粗糙度一致时,回波幅度平均值和标准差随着抗剪强度的降低而增加。表面粗糙度会影响回波幅度平均值和标准差与接头抗剪强度的关系。当空气间隙的长度小于400μm时,回波幅度与空气间隙长度近似成正比例关系。
The quality of TiAl and 40Cr diffusion welding interface was inspected by ultrasonic C-scan method and the relationships between mean and standard deviation of amplitude of interface echo and shear strength were studied.The effects of weld temperatures and surface roughnesses of specimens on above-mentioned relationships were investigated and the relationship between the amplitude and length of air gap was discussed.It is found that at a given surface roughness,bonding strength increases with the decreasing of mean and standard deviation of amplitude.The relationships between mean and standard deviation of amplitude of interface echo and shear strength are influenced by surface roughness.When the length of air gap is shorter than 400 μm,the amplitude of interface echo is approximately in proportion to the length of air gap.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2007年第5期69-72,共4页
Transactions of The China Welding Institution
关键词
超声波检测
C扫描
扩散焊接
异种材料
ultrasonic test
C-scan
diffusion welding
dissimilar materials
