Abstract
E21-Fe3AlC carbide (κ) in the Fe-Al-C ternary system is known to have ductility at room temperature. It forms a lamellar structure similar to the pearlite with a ferrite (α) phase through a eutectoid-like reaction from an austenite (γ) phase and improved mechanical properties are expected by replacing cementite to κ phase. The mechanical properties of α + κ two-phase lamellar structure were investigated through micro-Vickers hardness measurements and compression tests at room temperature in order to compare with those of pearlite steels. A typical mean inter-lamellar spacing of Fe-8at %Mn-13at %Al-7 at%C alloy aged at 773 K for 100 h was 60 nm and its yield stress and micro-Vickers hardness were 1880MPa and 580 HV, respectively. Yield stress and micro-Vickers hardness of these specimens were higher than those of pearlite steels regardless of the mean inter-lamellar spacing. Those results seem to be rationalized by taking the solid solution hardening of ferrite phase into account.
Original language | English |
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Pages (from-to) | 1679-1681 |
Number of pages | 3 |
Journal | Materials Transactions |
Volume | 44 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2003 Sep |
Keywords
- Compression test
- FeAlC
- Hall-Petch relation
- Lamellar structure
- Vickers hardness
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering