The disclosure relates to surface roughening methods in which a cutting
tool having a radial cutting blade with first and second cutting edges is
fed along a longitudinal axis of an article while rotating the cutting
tool about the axis. The first cutting edge forms a first machined
pattern of peaks and valleys on a surface of the article, and the second
cutting edge removes at least a portion of the peaks to form roughened
fracture surfaces in a second machined pattern defining an arrangement of
grooves, corresponding to the valleys, separated by lands, corresponding
to the roughened fracture surfaces. The first and second walls may
include concave regions within the grooves. The disclosure also provides
cutting tools useful in practicing the methods, and cylindrical articles
having interior or exterior surfaces roughened using the methods. The
methods may have applications to fabrication of cylinder blocks for
internal combustion engines.