The growing complexity observed in the structures of cast aluminum fittings has posed significant challenges to conventional non-destructive testing techniques

rendering them inadequate in fulfilling the requirements for swift on-site inspection of irregularly shaped cast aluminum fittings. Consequently

an ultrasonic testing method based on flexible phased array probes was proposed. Firstly

a dynamic focusing algorithm for flexible phased array ultrasonic probes was introduced

and the basic simulation theory of CIVA multi-technique software platform was analyzed. Then

the dynamic focusing algorithm used to achieve deflection and focusing of ultrasonic beam was verified by simulation with CIVA

and the parameters of the flexible phased array ultrasonic probes were optimized through simulation. Finally

the effectiveness and feasibility of the testing method were verified through the inspection of typical cast aluminum fittings. The results show that phased array ultrasonic testing technology based on flexible array probes can meet the requirements of outgoing quality control and on-site rapid inspection of cast aluminum fittings with irregular shape.