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Investigation of Impression Creep Deformation Behavior of Boron-Modified P91 Steel By High-End Characterization Techniques

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Manufacturing Engineering

Part of the book series: Lecture Notes on Multidisciplinary Industrial Engineering ((LNMUINEN))

Abstract

Boron addition to 9–12%Cr steels has proved to be attractive for improving creep properties. In current work, mechanisms pertaining to enhanced creep performance on addition of 100 ppm boron in standard P91 steel were investigated with the use of scanning electron microscopy (SEM), electron back-scattered diffraction (EBSD), and transmission electron microscopy (TEM). Parent metals of boron free P91 steel (P91) and boron-added P91 steel (P91B) were subjected to impression creep at a stress of 410 MPa and 625 ℃ by keeping depth of penetration as same for both cases. The deformed plastic zones formed on the corner of indenter and beneath the indenter were examined. TEM analysis revealed a high coarsening rate of precipitates in impression crept P91 steel than P91B. Geometrically necessary dislocation density as determined by EBSD analysis was same in P91B steel after impression creep. The recrystallized fraction of grains was considerably higher in P91B steel as measured through grain average misorientation (GAM). Pinning of dislocations by precipitates was poor in P91 steel after an impression creep test as observed in TEM.

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Abbreviations

SEM:

Scanning electron microscopy

TEM:

Transmission electron microscopy

EBSD:

Electron back-scattered diffraction

P91:

Boron-free P91 steel

P91B:

Boron-added P91 steel

OIM:

Orientation imaging microscopy

GND:

Geometrically necessary dislocations

GAM:

Grain average misorientation

LAGB:

Low-angle grain boundary

HAGB:

High-angle grain boundary

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, 144011, Punjab, India

    Akhil Khajuria & Raman Bedi

  2. Engineering Division, CSIR – National Metallurgical Laboratory, Jamshedpur, 831007, Jharkhand, India

    Rajneesh Kumar

Authors
  1. Akhil Khajuria
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  2. Raman Bedi
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  3. Rajneesh Kumar
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Corresponding author

Correspondence to Akhil Khajuria .

Editor information

Editors and Affiliations

  1. Department of Industrial and Production Engineering, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, India

    Vishal S. Sharma

  2. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India

    Uday S. Dixit

  3. Department of Industrial and Manufacturing Engineering, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, Mexico

    Noe Alba-Baena

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Khajuria, A., Bedi, R., Kumar, R. (2019). Investigation of Impression Creep Deformation Behavior of Boron-Modified P91 Steel By High-End Characterization Techniques. In: Sharma, V., Dixit, U., Alba-Baena, N. (eds) Manufacturing Engineering. Lecture Notes on Multidisciplinary Industrial Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-6287-3_10

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  • DOI: https://doi.org/10.1007/978-981-13-6287-3_10

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-13-6286-6

  • Online ISBN: 978-981-13-6287-3

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