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August 19, 2026MetalsOpen Access

Relation Between Local Mechanical Properties and Microstructural Evolution of 9%Cr Welded Joint by Nanoindentation Characterization

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Authors

YSYini SheZWZhiqiang WangLZLinye Zhang

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Overview

Experimental evaluation demonstrates creep-fatigue dwell times accelerate failure in P92 steel welded joints, indicating a transition from fatigue to combined creep-fatigue damage.

Key Points

  • To evaluate the creep-fatigue interaction behavior, fracture transitions, and local mechanical property changes in P92 steel welded joints subjected to varying dwell times at 650 °C.
  • Conducted creep-fatigue mechanical testing on P92 steel welded joints at 650 °C under varying dwell periods.
  • Characterized fracture surfaces using scanning electron microscopy (SEM) and measured local hardness, elastic modulus, and strain rate sensitivity via nanoindentation.
  • Prolonged dwell times progressively shortened the creep-fatigue cycle life of the welded joints.
  • Fracture modes shifted from fatigue-dominated failure to creep-fatigue interaction damage as dwell periods increased.

Cite This Study

She et al. (2026) studied this question.

synapsesocial.com/papers/6a85639d03308d306e2d6d89https://doi.org/10.3390/met16080916
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Also Consider

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  1. 1Type IV cracking and creep damage evolution of P92 steel weldment after long-team service2026
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