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Meeting MS&T21: Materials Science & Technology
Symposium Advances in Ferrous Metallurgy
Presentation Title High Strength Low Alloy Steels strengthened by Heusler precipitates
Author(s) Rafael T. Rodriguez De Vecchis, Minal Shah, Yuankang Wang, Xin Wang, Soumya Sridar, Zhangwei Wang, Wei Xiong
On-Site Speaker (Planned) Rafael T. Rodriguez De Vecchis
Abstract Scope Copper-bearing high-strength low-alloys (HSLA) steels are remarkable candidate alloys for a wide range of automotive and naval applications due to their unique combination of strength, toughness, and weldability. At the core of this outstanding properties synergy, it is the well-understood role of Cu and M<sub>2</sub>C precipitates. 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. Using a CALPHAD-based ICME framework, this work successfully introduces the intermetallic Fe<sub>2</sub>SiTi Heusler phase as an effective grain refiner and strengthening precipitate. After a heat-treatment design, co-precipitation of nanosized Cu cluster and Fe<sub>2</sub>SiTi precipitates yield a peak aged hardness values above 700 HV and compression yield strength values above 1.8 GPa with more than 12% ductility.


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Effect of CO2 Injection into Blast Furnace Tuyeres on Smelting Parameters
Evaluation of Different Austenitization Sub-Models for 22MnB5 Steel Using Bayesian Model Selection Technique
High Strength Low Alloy Steels strengthened by Heusler precipitates
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