Experimental measurement and numerical simulation of residual stresses in a carburized layer of a 5120 steel

Conference · Fri Sep 01 04:00:00 EDT 1995

OSTI ID:113820

Rangaswamy, P; Bourke, M A.M.; Shipley, J C; Goldstone, J A

A combined experimental and numerical study of residual stress and microstructure has been performed for a carburized steel 5120 specimen. Specimens were cut from 5120 steel bar stock, in the shape of hockey pucks and were subsequently carburized and quenched. X-ray diffraction was used to record stress profiles through the case for the martensite and retained austenite on the two flat surfaces oriented up and down during the quench. Layer removal was performed by electropolishing. Rietveld analysis was used to determine the lattice parameters of the phases at each depth varying with both carbon content and stress. The experimental measurements are compared with a numerical simulation of the phase transformation and the metallurgical changes following the carburization and quench. Results am discussed in the context of the microstructure and the role played by the retained austenite in interpretation. In addition the carbon profile obtained from the lattice parameters is compared with profiles measured using burnout.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 113820
• Report Number(s): LA-UR--95-3127; CONF-951222--1; ON: DE96000034
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBURIZATION
RESIDUAL STRESSES
STEELS
SURFACE TREATMENTS