Creating Highly Triaxial Residual Stresses and Relaxation of the Stress Field due to Thermal Ageing

Article type: Research Article

Authors: Hossain, S. | Truman, C.E. | Smith, D.J. | Daymond, M.R.

Affiliations: Department of Mechanical Engineering, University of Bristol, Bristol BS8 1TR, UK | ISIS Facility, Rutherford Appleton Lab, Chilton, Didcot, Oxon OX110QX, UK

Note: [] Corresponding author. Tel.: +44-0-117-928-8250. Fax: +44-0-117-929-4423. E-mail: s.hossain@bristol.ac.uk

Abstract: This paper presents results from an experimental and numerical study about the creation of highly triaxial residual stresses by rapid spray water quenching of solid stainless steel spheres and cylinders and the subsequent change in residual stresses due to creep. Finite element (FE) simulations predicted highly compressive residual stresses around the surface of the specimens and tensile near the centre. Neutron diffraction (ND) was used to measure the internal residual stress distribution in quenched specimens. These measurements were in good agreement with FE predictions. Simulations of creep relaxation and damage accumulation were also carried out in stainless steel specimens which had previously been water quenched and subsequently allowed to thermally age at 550°C for 3200 h.

Keywords: Heat transfer, Quenching, Residual stress, Triaxiality, Thermal ageing, Creep

DOI: 10.1080/10238160410001734540

Journal: Journal of Neutron Research, vol. 12, no. 1-3, pp. 111-115, 2004