Residual stresses in multi-pass friction stir processed NiAl bronze using the contour method
- Mahoney M. ,
- Fuller C. ,
- DeWald A. ,
- et al
- Mahoney M. ,
- Fuller C. ,
- DeWald A. and
- Hill M.
Repository
Description
Multirun friction stir processing (FSP) (12 mm depth over large surface area) was performed on NiAl bronze (Cu, 9.1%Al, 4.4%Ni, 3.9%Fe) thick plates (thickness 40 mm) using a rectangular spiral-out raster path, and longitudinal residual stresses were measured as a function of process variables (rotation rate 800-1200 rpm, travel speed 51-102 mm/min) by the contour method. A step spiral FSP tool design was employed and, to reduce wear, a sacrificial shield was devised to deflect flash from the tool shoulder. The contour method involved specimen cutting with a wire electric discharge machine, deformation measurement of cut surfaces with a scanning laser profilometer, and finite element modelling of residual stresses. The influence of heat from successive FSP runs with respect to stress relief was assessed.
6th International Symposium, 10-13 Oct 2006, Session 14B: Dissimilar and Metallurgy II, Paper 03
Related Records
