Internal residual strain distribution in chromium-molybdenum steel after carburizing and quenching measured by neutron strain scanning

Yoshihisa Sakaida, Hajime Yoshida, Shigeki Yashiro, Shohei Yamashita, Takahisa Shobu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A hollow cylinder of a chromium-molybdenum steel composed of 0.20 mass% C was used as a model that simplified a motorcycle transmission gear. The cylinder was carburized in a carrier gas and quenched in an oil bath. After quenching, the internal residual strain and peak width distributions in the radial, hoop, and axial directions were nondestructively mapped by neutron strain scanning, and were compared to the results of an elastoplastic finite element analysis. The carbon content and hardness gradients were also measured to determine the case depth. The residual strain was evaluated from the lattice spacing change. The lattice spacing change was obtained from the peak shift from an unstressed peak position. In this study, the unstressed peak position was determined using coupons that were cut from the interior of the same quenched cylinder. As a result, the carbon content, hardness, and internal residual strain distributions almost accorded with the results of finite element analysis. Although the measured residual hoop strains near the hardened layer partially deviated from the analyzed weighted average strains, the validity of the internal strain field measured by neutron strain scanning was confirmed.

Original languageEnglish
Title of host publicationMechanical Stress Evaluation by Neutrons and Synchrotron Radiation VI
Pages173-177
Number of pages5
DOIs
Publication statusPublished - Jan 2 2014
Externally publishedYes
Event6th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS VI 2011 - Hamburg, Germany
Duration: Sep 7 2011Sep 9 2011

Publication series

NameMaterials Science Forum
Volume772
ISSN (Print)0255-5476

Other

Other6th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS VI 2011
CountryGermany
CityHamburg
Period9/7/119/9/11

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Sakaida, Y., Yoshida, H., Yashiro, S., Yamashita, S., & Shobu, T. (2014). Internal residual strain distribution in chromium-molybdenum steel after carburizing and quenching measured by neutron strain scanning. In Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation VI (pp. 173-177). (Materials Science Forum; Vol. 772). https://doi.org/10.4028/www.scientific.net/MSF.772.173