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May 30, 2026MaterialsOpen Access

The Effect of Heat Treatment on the Microstructure and Mechanical Properties of P91 Steel for High-Temperature Applications

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Authors

KKKarolina Kowalczyk-SkoczylasUniversity of Silesia in KatowiceAGAgata GawronUniversity of Occupational Safety Management in KatowiceKAKrzysztof AniołekUniversity of Silesia in Katowice

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Implication

Randomized trial examines heat treatment effects on mechanical properties in P91 steel, suggesting enhanced stability for high-temperature use.

Key Points

  • To investigate how high-temperature heat treatment influences the microstructure and mechanical properties of P91 steel.
  • Tensile tests were performed on post-operation P91 steel after different heat treatments.
  • Comparison of strength and ductility after various tempering processes including normalization and double tempering.
  • Microstructural analysis focused on the distribution and characteristics of precipitates.
  • Normalization increased tensile strength to 1330 MPa compared to 692 MPa in as-received samples.
  • Tempering at 780 °C for 4 h decreased strength to 642 MPa but enhanced ductility to 11.2% elongation.
  • Double tempering led to a uniform microstructure with improved fracture characteristics, reducing martensite brittleness.

Cite This Study

Kowalczyk-Skoczylas et al. (2026) studied this question.

synapsesocial.com/papers/6a1a814b0307b785094331cfhttps://doi.org/10.3390/ma19112281
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