Residual stress measurements in rolling mill rolls using deep hole drilling technique

Abstract

The deep hole drilling (DHD) technique allows complete through-thickness residual stress measurements of large engineering components at depths up to 450 mm. This information enables manufacturers to be less conservative with designs and more efficient with resources without fear of component failure. A case study involving stress analysis in martensitic rolling mill rolls is presented, but DHD is successfully applied to measure weld residual stresses in pressure vessels and piping and, more recently, has found applications in the aerospace industry. The ability to use DHD on site coupled with its analytical power offers a significant advantage over competing stress measurement methods.