Fe-P alloys with up to 0. 67 wt% phosphorus show intergranular fracture when quenched from 1,073 K. Addition of carbon up to about 0. 01 wt% fracture caused by grain boundary segregation of phosphorus and lowers the ductile-brittle transition temperature (DBTT). This effect is due to segregation of carbon to grain boundaries. Aging at 873 K of a quenched specimen with 0. 52%P and 0. 0008%C reduces DBTT and increases the grain boundary segregation of carbon but does not affect the degree of grain boundary segregation of phosphorus. Segregation of carbon increases grain boundary cohesion and prevents fracture without removing phosphorus from the grain boundaries.
|Number of pages||7|
|Journal||Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan|
|Publication status||Published - 1984|