TY - GEN
T1 - Measurement of Residual Stresses in Aluminium to Copper Friction Stir Spot Welds
AU - Mubiayi, Mukuna Patrick
AU - Akinlabi, Esther T.
N1 - Funding Information:
The authors acknowledge the financial support from the University of Johan-
Funding Information:
The authors acknowledge the financial support from the University of Johannesburg.
Publisher Copyright:
© 2020, Springer Nature Singapore Pte Ltd.
PY - 2020
Y1 - 2020
N2 - Friction stir spot welding (FSSW) technique was used to join aluminium (AA1060) to copper (C11000). The effect of process parameters on the residual stress and the full width at half maximum was studied. A copper ring was observed on both sides of the keyhole in all the fabricated FSS Welds. The surface morphology of the copper rings was examined using a scanning electron microscope; while the residual stresses were measured using the non-destructive X-ray diffraction method. The copper ring dimension in all the fabricated FSS Welds increased with the variation of the tool shoulder plunge depths; nevertheless, the welds fabricated at 1200 rpm rotation speed displayed a decrease in the dimension of the formed copper ring. In the analysed samples only compressive residual stresses were observed and highest residual stress of −116.8 MPa was obtained on the formed copper ring of the spot welds fabricated at a rotation speed of 800 rpm and 0.5 mm tool shoulder plunge depth. The presence of higher residual stress on the copper rings was due to the extrusion of copper into the aluminium sheet. Additionally, the intensity of all the peaks for the fabricated spot welds decreased in comparison to the peaks generated by the aluminium and copper base materials. Furthermore, the tool shoulder plunge depth affected the full width at half the maximum (FWHM).
AB - Friction stir spot welding (FSSW) technique was used to join aluminium (AA1060) to copper (C11000). The effect of process parameters on the residual stress and the full width at half maximum was studied. A copper ring was observed on both sides of the keyhole in all the fabricated FSS Welds. The surface morphology of the copper rings was examined using a scanning electron microscope; while the residual stresses were measured using the non-destructive X-ray diffraction method. The copper ring dimension in all the fabricated FSS Welds increased with the variation of the tool shoulder plunge depths; nevertheless, the welds fabricated at 1200 rpm rotation speed displayed a decrease in the dimension of the formed copper ring. In the analysed samples only compressive residual stresses were observed and highest residual stress of −116.8 MPa was obtained on the formed copper ring of the spot welds fabricated at a rotation speed of 800 rpm and 0.5 mm tool shoulder plunge depth. The presence of higher residual stress on the copper rings was due to the extrusion of copper into the aluminium sheet. Additionally, the intensity of all the peaks for the fabricated spot welds decreased in comparison to the peaks generated by the aluminium and copper base materials. Furthermore, the tool shoulder plunge depth affected the full width at half the maximum (FWHM).
KW - Aluminium
KW - Copper
KW - Copper ring
KW - Friction stir spot welding
KW - Residual stress
UR - http://www.scopus.com/inward/record.url?scp=85075763497&partnerID=8YFLogxK
U2 - 10.1007/978-981-13-8297-0_34
DO - 10.1007/978-981-13-8297-0_34
M3 - Conference contribution
AN - SCOPUS:85075763497
SN - 9789811382963
T3 - Lecture Notes in Mechanical Engineering
SP - 319
EP - 326
BT - Advances in Material Sciences and Engineering, ICMMPE 2018
A2 - Awang, Mokhtar
A2 - Emamian, Seyed Sattar
A2 - Yusof, Farazila
PB - Springer
T2 - 4th International Conference on Mechanical, Manufacturing and Plant Engineering, ICMMPE 2018
Y2 - 14 November 2018 through 15 November 2018
ER -