High-Temperature Crack-Opening Displacement Measurements in a Ferritic Steel

Publisher Website
Google Scholar
Abstract
Crack-opening displacement and crack-growth measurements have been carried out on a vacuum-melted, low-alloy ferritic steel at 823 K. The results show that the crack-opening displacement at the crack tip increases in a discontinuous manner before failure of the testpieces, The crack length also increases similarly, but with the size of the increments of growth being an order of magnitude larger than the increases in crack-opening displacement. Scanning electron microscopy shows that cavitation is occurring ahead of the main creep crack. These results are discussed in the context of developing a more reliable parameter for predicting creep fracture.

This publication has 1 reference indexed in Scilit: