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March 3, 2024Scientific ReportsOpen Access

Significant reduction in creep life of P91 steam pipe elbow caused by an aberrant microstructure after short-term service

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Authors

HZHongyu ZhouJLJian LiJLJie Liu

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Overview

Creep testing reveals accelerated rupture in a serviced P91 steam pipe elbow, indicating premature failure driven by microstructural degradation.

Key Points

  • Creep rupture life dropped by two orders of magnitude in the serviced P91 steel elbow, driven by the rapid decomposition of martensitic lath into blocky ferrite.
  • A reduced residual life of 53,353 h followed 20,000 h of service, caused by aberrant microstructure evolution that violated ASME standard hardness requirements.
  • Creep testing across 550–600 °C shows thermal exposure drives cavity cracking, calling for enhanced safety monitoring as laves phase coarsening accelerates failure.

Cite This Study

Zhou et al. (2024) studied this question.

synapsesocial.com/papers/68e75ef0b6db6435876d5889https://doi.org/10.1038/s41598-024-55557-w
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Evolution of Microstructure and Mechanical Properties of P92 Main Steam Pipelines After Long-Term Service2025
  2. 2Prediction of Residual Life of In-Service P91 Steel Joints Based on Fracture Behavior2024 · 2 citations
  3. 3Temperature dependence of creep rupture life of long-term serviced Grade 91 steel2025
  4. 4Creep cavities and carbide evolution in interrupted creep conditions along P91 steel of dissimilar weld joint2024 · 4 citations
  5. 5The influence of coupling effect between stress and high temperature on the degradation of microstructure and hardness in P91 steel2024 · 18 citations