Diffraction Plane Dependence of Micro Residual Stresses in Uniaxially Extended Carbon Steels

Atom Indonesia

M. Refai¹  T. Hanabusa²  A. Shiro³  M. Nishida⁴ 

[1] Center for Technology of Nuclear Industry Materials, National Nuclear Energy Agency Puspiptek, Serpong, Tangerang 15314, Indonesia;Faculty of Engineering, The University of Tokushima, Minami-Josanjima, Tokushima, Japan;Graduate School of Advanced Technology and Science, The University of Tokushima, Minami- Josanjima, Tokushima, Japan;Kobe-Kosen, Gakuen-Higashi, Kobe, Japan;

关键词: Carbon steel;    Micro stress;    Neutron diffraction;    Residual stresses;   

DOI  :  http://dx.doi.org/10.17146/aij.2010.31

来源: DOAJ

【 摘 要 】

In the stress measurement using X-ray or neutron diffraction, an elastic anisotropy as well as a plastic anisotropy of crystal must be carefully considered. In the X-ray and neutron diffraction stress measurement for polycrystalline materials, a particular {hkl} plane is used in measuring lattice strains. The dependence of an X-ray elastic constant on a diffraction plane is a typical example caused by an elastic anisotropy of the crystal. The yield strength and the work hardening rate of a single crystal depend on a crystallographic direction of the crystal. The difference in the yield strength and the work hardening rate relating to the crystallographic direction develops different residual stresses measured on each {hkl} diffraction after plastic deformation of a polycrystalline material. The present paper describes the result of the neutron stress measurement on uniaxially extended low and middle carbon steels. A tri-axial residual stress state developed in the extended specimens was measured on different kind of {hkl} diffraction plane. The measurement on the {110}, {200} and {211} diffraction showed that residual stresses increased with increasing the plastic elongation and the residual stresses on {110} were compressive, {200} were tensile and those on {211} were the middle of the former two planes.

【 授权许可】

Unknown