Stress concentration and residual stress is the main reason to cause fatigue failure and damage. Residual stresses are stresses that remain in a solid material after the original cause of the stresses has been removed. It is divided into two different types of residual stresses which is known as desirable and undesirable residual stresses. For welded joint, residual stresses primarily develop due to differential weld thermal cycle (heating, peak temperature and cooling at the any moment during welding) experienced by the weld metal and region closed to fusion boundary i.e. heat affected zone. Presence of undesirable residual stresses in the weld joints can encourage or discourage failures due to external loading as their effect is additive in nature.

There’s a need for a systematic solution which utilised capability of technology in measuring residual stresses and treatment of residual stresses. Ultrasonic Impact Treatment Solutions (UITS) technique is a combination of two methods in the field of non-destructive testing before treatment utilizing Contacting Metal Magnetic Memory (MMM) and after treatment utilizing Ultrasonic Impact Treatment Solutions (UITS), which is effective for the diagnosis of the residual stresses experience by the ferritic material and a treatment method in reducing the residual stress level.