Abstract
We investigated the effect of Si on the tensile properties of Fe-33Mn, Fe-33Mn-4Si, and Fe-33Mn-6Si austenitic alloys (mass%) at 273, 294, 323, and 423 K. The Si addition promoted the deformation-induced -martensitic transformation, thereby enhancing the work-hardening capacity. In terms of Considère's criterion, the enhanced work-hardening capacity can improve uniform elongation. However, the Si addition simultaneously promoted brittle cracking associated with -martensite, tending toward decreasing elongation. As a result of the ambivalent roles of Si related to -martensite, the elongationstrength balance was improved by the addition of 4%Si, but was deteriorated when the Si content increased to 6%. As an additional effect, the Si addition changed the microvoid-formation behavior, resulting in decreasing local elongations.
Original language | English |
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Pages (from-to) | 819-825 |
Number of pages | 7 |
Journal | Materials Transactions |
Volume | 56 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2015 |
Externally published | Yes |
Keywords
- Austenitic steel
- Brittle fracture
- High manganese steel
- Work hardening
- ε-martensitic transformation
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering