About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Fundamental Science of Microstructural Evolution and Phase Transformations: An MPMD/FMD/SMD Symposium in Honor of Peter Voorhees
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| Presentation Title |
Evolution of Cu Precipitates and Its Impact on the Mechanical Behavior of Low-Carbon Steels |
| Author(s) |
Kapil Dev Sharma, Anish Karmakar |
| On-Site Speaker (Planned) |
Kapil Dev Sharma |
| Abstract Scope |
Two copper-modified steels were analysed for their phase composition and mechanical response under as-received (AR) and quenched and tempered (Q&T) conditions. Precipitates were examined using electron microscopy, and their mean radius, number density, and volume fraction were predicted through MatCalc simulation. The dominant influence of co-operative/short-range diffusion in HCu steel led to degenerate pearlite formation (71% vol. pct.), whereas LCu steel exhibited lesser pearlite formation (3% vol. pct.). The softening and hardening mechanisms during tempering was discussed, correlating with the transition of Cu precipitates from coherent BCC to incoherent FCC via semi-coherent 9R-crystal structures. HCu samples displayed higher yield strength (YS) and ultimate tensile strength (UTS). Following a 0.75-hour tempering, LCu steel exhibited strength (811 MPa), ductility (19.35%), hardness (267±4 HV), and a tensile toughness of 146×105 kJ/m3. The investigation established a comprehensive correlation between microstructure and mechanical properties through fractographic analysis and the coherency of different precipitates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Mechanical Properties |