How can we know the size of blow hole or inclusion before RT? & without defect size we can't use this equation of contrast. So in that case how can we know the contrast value required? & in the first place we dont know what kinds of defects are inside a material & for that only we are doing RT
How can we know the size of blow hole or inclusion before RT? & without defect size we can't use this equation of contrast. So in that case how can we know the contrast value required? & in the first place we dont know what kinds of defects are inside a material & for that only we are doing RT