Yes / Brittleness in manganese steels can be associated with processing in a "wet¿
[micro]climate resulting in the formation of continuous oxide networks. The formation of
these networks can be prevented by sintering in an atmosphere, also ¿local¿ in a semiclosed
container, adhering to the Ellingham-Richardson oxide reduction criteria. When
this requirement is satisfied, however, further types of ductile ¿ brittle transitions are
observed. Rapid cooling, typically above 40°C/min, produces enough martensite to render
Fe-(3-4)Mn-(0·6-0·7)C material macroscopically brittle. Quenched and conventionally
tempered structures remain brittle. It is tentatively suggested that segregation of minor
alloying/tramp element(s), as in cast materials, is responsible for this temper
embrittlement. To overcome it, heat treatment at a temperature no higher than 200°C,
recovery/stress relief, is recommended.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/892 |
| Date | January 2005 |
| Creators | Cias, A., Mitchell, Stephen C. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article |
| Rights | © 2005 IMR SAS. Reproduced in accordance with the publisher's self-archiving policy. |
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