In this paper, we propose a technique to create cracks by
combining crated stress with cast iron electrode [9]. This
process allowed us to made defects similar to those in the
nature. In our experiment adopting the process and technique
to create weld specimens with crack defect. The deviation of
the crack can be guaranteed within ±0.5mm in height and
±0.5mm in length, there was good response to the phased
array ultrasonic testing technique and wave shape of defect
was similar to natural crack