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<p>This research investigates the application of the novel Wilshire–Cano–Stewart (WCS) methodology for predicting both creep deformation characteristics and extended service lifespan of India-specific Reduced Activation Ferritic Martensitic steel. Uniaxial creep experiments were conducted at 823&#xa0;K and stress conditions ranging from 200 to 260&#xa0;MPa. The differential equations governing creep strain and damage in the WCS model were resolved through finite element analysis implemented via ABAQUS software. Statistical evaluation using the normalized mean square error scatter index demonstrated that the WCS model accurately reproduces experimental creep behavior with average relative deviation below 10%. Furthermore, the WCS approach demonstrated the capability to extrapolate creep life to 100,000&#xa0;h or more using relatively short-term experimental data covering only 7,000&#xa0;h of testing.</p>

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Creep Behavior and Life Prediction of India-Specific RAFM Steel by Using Modified Wilshire Model

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • K. M. K. Chowdary,
  • G. V. Prasad Reddy,
  • A. R. Ballal,
  • D. R. Peshwe,
  • J. Vanaja

摘要

This research investigates the application of the novel Wilshire–Cano–Stewart (WCS) methodology for predicting both creep deformation characteristics and extended service lifespan of India-specific Reduced Activation Ferritic Martensitic steel. Uniaxial creep experiments were conducted at 823 K and stress conditions ranging from 200 to 260 MPa. The differential equations governing creep strain and damage in the WCS model were resolved through finite element analysis implemented via ABAQUS software. Statistical evaluation using the normalized mean square error scatter index demonstrated that the WCS model accurately reproduces experimental creep behavior with average relative deviation below 10%. Furthermore, the WCS approach demonstrated the capability to extrapolate creep life to 100,000 h or more using relatively short-term experimental data covering only 7,000 h of testing.