Fracture tests on two cast and wrought 18–8–1Nb austenitic steels

Autor: Stock, C. R., Bodsworth, C.
Zdroj: Materials Science & Technology; January 1967, Vol. 1 Issue: 1 p132-141, 10p
Abstrakt: The influence of manufacturing process and aging treatments on the fracture characteristics of two austenitic steels at 25° and 725°C has been evaluated from energy measurements and a crack-tip displacement parameter measured concurrently in three-point bending. A major feature (particularly with the cast alloys) was the initiation over a range of crack-tip displacements of several cracks at a notch root, anyone of which propagated to failure. The paper discusses a case for measuring a maximum load or instability crack-tip displacement when multiple crack initiation takes place rather than an initiation displacement.
Databáze: Supplemental Index