The microstructure and some phase transformation characteristics of the dual phase steel 3CR12

Oilatometry and metallography have been used to establish the phase transformation diagram of a steel containing 12% chromium and 0,03% carbon. A dual phase material with attractive mechanical properties and adequate corrosion resistance can be achieved by careful control of alloy content and heat treatment. The work has demonstrated the influence of the addition of alloying elements (in particular nickel), and thermal history. The dual phase (ferrite plus martensite) nature of the steel has been identified and characterised by both optical and transmission electron microscopy. The islands of lath martensite and the attendant high dislocation densities present good mechanical behaviour. In particular, the continuous yielding, work hardening, formability and toughness can be attributed to this microstructure. The thesis provides a base for the discussion of methods of "designing" the steel for particular applications.

Grantor dc:publisher.institution

Centre for Materials Engineering

Year dc:date.issued

1983

Author dc:creator

• Protopappas, Eugenie

Advisor dc:contributor.advisor

• Ball, Anthony

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/21860

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/21860