X-ray study on residual stress and deformation behavior in grinding layer of dual phase (a+γ) strainless steel

Toshihiko Sasaki, Hajime Hirose, Masumi Saka

Research output: Contribution to journalArticle

Abstract

Dual phase stainless steels consist of the ferrite and austenite phase and have high strength and corrosion-resistance. They are often used for offshore structures. Microscopic stress is generated because of the difference in mechanical properties of each individual phase. In this study, X-ray diffraction technique and the theories of micromechanics models were used. Distributions of macrostress, microstresses and plastic strain near ground surface were investigated. Specimens ground in the Up-cut and the Down-cut direction with various depths of cut were prepared. In the results, residual tensile stresses in the ferrite phase increase with the depth of cut. However, the stresses in the austenite phase were independent of depth of cut. Furthermore, change of phase stress during bending tests were evaluated; the difference between experimental and theoretical results increases when tensile stress increases. It was concluded that the misfit of plastic strain is an important factor for deformation behavior of dual phase stainless steel.

Original languageEnglish
Pages (from-to)1840-1846
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume67
Issue number663
Publication statusPublished - 2001 Dec 1

Keywords

  • Dual phase stainless steel
  • Experimental stress analysis
  • Grinding
  • Macrostress
  • Micromechanics
  • Microstrcss
  • Plastic strain
  • Residual stress
  • X-ray stress measurement

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'X-ray study on residual stress and deformation behavior in grinding layer of dual phase (a+γ) strainless steel'. Together they form a unique fingerprint.

  • Cite this