4. Conclusions
A number of significant and encouraging results have
been obtained using the C-scan technique; primarily it has
been possible to obtain credible NDT assessments of resistance
spot welds in aluminium. The results reported here have shown
good correlation with actual peeled samples and metallographic
cross sections. Importantly the results were relatively easy to
attain, with each measurement taking less than 30 s to acquire,
and without extensive operator training for NDT. This is a
particular advantage with practical nature, compared to earlier
air coupled systems, which required a few hours to obtain a
useable image [13]. In addition it provided further fundamental
understanding of aluminium RSW process through using the
C-scan technique; in particular with respect to the presence
of an outer fused ring, corresponding to the extremity of electrode
indentation and force influence. The relatively simple, though
perhaps obvious requirement, for a flat contact surface for
the ultrasonic scanner was the major step in advancing the
C-scan technique as a viable candidate NDT of aluminium spot
welds.
The NDT C-scan technique evaluated can provide information
regarding aluminium spot weld size and shape.
A prerequisite for obtaining reliable NDT results is the removal
of any electrode surface indentation prior to scanning to
provide a flat surface to prevent signal losses due to sound
wave refraction.
Use of the C-scan NDT technique suggests the presence of an
outer fused ring at the faying surface corresponding to the
outer extremity of the electrode indentation.
Correlation between weld nugget diameters determined by
C-scan and peeled plug measurement from a real assembly
suggests practical applications of the technique.
Acknowledgement
The authors would like to thank the European Regional
Development Fund and the Advanced West Midlands Fund, UK,
Jaguar Land Rover, for their support throughout the project.
Re
4. Conclusions
A number of significant and encouraging results have
been obtained using the C-scan technique; primarily it has
been possible to obtain credible NDT assessments of resistance
spot welds in aluminium. The results reported here have shown
good correlation with actual peeled samples and metallographic
cross sections. Importantly the results were relatively easy to
attain, with each measurement taking less than 30 s to acquire,
and without extensive operator training for NDT. This is a
particular advantage with practical nature, compared to earlier
air coupled systems, which required a few hours to obtain a
useable image [13]. In addition it provided further fundamental
understanding of aluminium RSW process through using the
C-scan technique; in particular with respect to the presence
of an outer fused ring, corresponding to the extremity of electrode
indentation and force influence. The relatively simple, though
perhaps obvious requirement, for a flat contact surface for
the ultrasonic scanner was the major step in advancing the
C-scan technique as a viable candidate NDT of aluminium spot
welds.
The NDT C-scan technique evaluated can provide information
regarding aluminium spot weld size and shape.
A prerequisite for obtaining reliable NDT results is the removal
of any electrode surface indentation prior to scanning to
provide a flat surface to prevent signal losses due to sound
wave refraction.
Use of the C-scan NDT technique suggests the presence of an
outer fused ring at the faying surface corresponding to the
outer extremity of the electrode indentation.
Correlation between weld nugget diameters determined by
C-scan and peeled plug measurement from a real assembly
suggests practical applications of the technique.
Acknowledgement
The authors would like to thank the European Regional
Development Fund and the Advanced West Midlands Fund, UK,
Jaguar Land Rover, for their support throughout the project.
Re
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4. Conclusions
A number of significant and encouraging results have
been obtained using the C-scan technique; primarily it has
been possible to obtain credible NDT assessments of resistance
spot welds in aluminium. The results reported here have shown
good correlation with actual peeled samples and metallographic
cross sections. Importantly the results were relatively easy to
attain,กับการวัดแต่ละครั้งใช้เวลาน้อยกว่า 30 วินาทีที่จะได้รับการฝึกอบรมที่กว้างขวางสำหรับ
และไม่มีผู้ประกอบการ NDT . นี้เป็นประโยชน์โดยเฉพาะกับปฏิบัติ
อากาศธรรมชาติเมื่อเทียบกับก่อนหน้านี้ทั้งระบบ ซึ่งต้องไม่กี่ชั่วโมงขอรับ
ใช้ภาพ [ 13 ] นอกจากนี้มันให้เพิ่มเติมพื้นฐาน
เข้าใจขั้นตอน rsw อลูมิเนียมที่ผ่านการใช้เทคนิค c-scan
; in particular with respect to the presence
of an outer fused ring, corresponding to the extremity of electrode
indentation and force influence. The relatively simple, though
perhaps obvious requirement, for a flat contact surface for
the ultrasonic scanner was the major step in advancing the
C-scan technique as a viable candidate NDT of aluminium spot
welds.
The NDT C-scan technique evaluated can provide information
regarding aluminium spot weld size and shape.
A prerequisite for obtaining reliable NDT results is the removal
of any electrode surface indentation prior to scanning to
provide a flat surface to prevent signal losses due to sound
wave refraction.
Use of the C-scan NDT technique suggests the presence of an
outer fused ring at the faying surface corresponding to the
outer extremity of the electrode indentation.
Correlation between weld nugget diameters determined by
C-scan and peeled plug measurement from a real assembly
suggests practical applications of the technique.
Acknowledgement
The authors would like to thank the European Regional
Development Fund and the Advanced West Midlands Fund, UK,
จากัวร์ แลนด์โรเวอร์ สำหรับการสนับสนุนของพวกเขาตลอด
Re : โครงการ
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