| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Late News Poster Session
|
| Presentation Title |
P3-26: Introducing Heusler Fe<sub>2</sub>SiTi Intermetallic as a New Strengthening Precipitate for High Strength Low Alloy Steels |
| Author(s) |
Rafael T. Rodriguez De Vecchis, Xin Wang, Soumya Sridar, Zhangwei Wang, Wei Xiong |
| On-Site Speaker (Planned) |
Rafael T. Rodriguez De Vecchis |
| Abstract Scope |
High strength low alloy (HSLA) steels are candidate steels for automobile and naval applications due to an outstanding synergy of weldability, toughness, and strength resulting from the combination of low carbon content and co-precipitation of Cu and M<sub>2</sub>C. However, in the continuous search for stronger, lighter, and low-alloying steels, precipitation strengthening of Heusler compounds has proven promising but has been so far left unexplored in the context of HSLA steels. Hence, in this work, a composition close to the HSLA-100 steel was designed through a CALPHAD-based ICME (CALPHAD: Calculation of Phase Diagrams, ICME: Integrated Computational Materials Engineering) framework with Fe<sub>2</sub>SiTi Heusler intermetallic for precipitation strengthening effects. The phase stability and precipitation kinetics were systematically studied via phase transformation modeling and experiments. The latter report a 717 HV peak aging hardness as the result of record-high ~8 vol.% of nano-sized Fe<sub>2</sub>SiTi precipitate formed concomitantly with Cu clusters. |