Aluminium alloy 7050 was friction stir welded using three different ratios of tool rotation rate to weld travel speed. Welds were made using travel speeds of between 0·85 and 5·1 mm s−1. Weld power and torque were recorded for each weld. An FEM simulation was used to calculate the time–temperature history for a subset of the welds. For each weld the hardness distribution with and without post-weld heat treatment was determined. The hardness distributions within the welds are rationalised based on the friction stir welding parameters and the resulting temperature histories. The analysis provides a basis for manipulation of weld parameters to achieve desired properties.
ThomasW. M., NicholasE. D., NeedhamJ. C., ChurchM. G., TemplesmithP. and DawesC. J.: International Patent Application No. PCT/GB92/02203 and GB Patent Application No. 9125978·9, 1991.
2.
ReynoldsA. P., LockwoodW. D. and SeidelT. U.: Mater. Sci. Forum, 2000, 331–337, 1719–1724.
3.
StaleyJ. T.: Met. Trans., 1974, 5, 929–932.
4.
JataK. V., SankaranK. K. and RuschauJ. J.: Metall. Mater. Trans. A, 2000, 31A, 2181–2192.
5.
VianaF., PintoA. M. P., SantosH. M. C. and LopesA. B.: J. Mater. Process. Technol., 1999, 92–93, 54–59.
6.
ArchambaultP. and GodardD.: Scripta Mater., 2000, 42, 675–680.
7.
MahoneyM. W., RhodesC. G., FlintoffJ. G., SpurlingR. A. and BingelW. H.: Metall. Mater. Trans. A, 1998, 29A, 1955–1964.
8.
HwangR. Y. and ChouC. P.: Scripta Mater., 1998, 38, 215–221.
9.
RhodesC. G., MahoneyM. W., BingelW. H., SpurlingR. A. and BamptonC. C.: Scripta Mater., 1997, 36, 69–75.
10.
SatoY. S., UrataM. and KokawaH.: Metall. Trans. A, 2002, 33A, 625–635.
11.
RhodesC. G., MahoneyM. W., BingelW. H. and CalabreseM.: Scripta Mater., 2003, 48, 1451–1455.
12.
SuJ.-Q., NelsonT. W., MishraR. and MahoneyM.: Acta Mater., 2003, 51, 713–729.
13.
YangB. C., YanJ. H., SuttonM. A. and ReynoldsA. P.: Mater. Sci. Eng. A, 2004, A364, 55–65.
14.
KandakarM. H., KhanJ. A. and ReynoldsA. P.: Proc. 6th Int. Conf. on ‘Trends in welding research’, Callaway Gardens, GA, USA, April 2002, 218–223; Materials Park, OH, ASM International.
15.
KhandkarM. Z. H., KhanJ. A. and ReynoldsA. P.: Sci. Technol. Weld. Joining, 2003, 8, 165–174.
16.
HassanK. A. A., NormanA. F., PriceD. A. and PrangnellP. B.: Acta Mater., 2003, 51, 1923–1936.
