The Effect of Delta-Ferrite on the Properties of Low-Carbon Martensite Stainless Steels
Abstract
The formation of structurally free delta-ferrite in martensitic stainless steel greatly impairs its mechanical properties. Tests along the fiber showed lower notch toughness values, particularly at low testing temperatures; the cold-brittleness considerably increased while the work of crack propagation decreased in tests across the fiber and, particularly in the third direction (over the thickness of the plate), delta-ferrite was found to have a drastically negative effect on the mechanical properties. The brittleness of martensitic steel with the appearance of delta-ferrite is caused by the low resistance of ferrite to brittle failure, and apparently, the increase in martensite ductility due to the increase in carbon content in the martensite following its redistribution between the austenite and the delta-ferrite.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 27, 1970
- Accession Number
- AD0704770
Entities
People
- V. V. Sachkov
- Ya. M. Potak
- Ye. A. Sagalevich
Organizations
- National Air and Space Intelligence Center