Straightening of induction hardened shafts: influence on fatigue strength and residual stress
2012 (English)In: HTM Journal of Heat Treatment and Materials, ISSN 1867-2493, Vol. 67, no 3, 179-187 p.Article in journal (Refereed) Published
Straightening of distorted components after heat treatment is often a necessary operation. The straightening operation leads to local plasticization, which is affecting the residual stress state, the hardness, and ultimately the fatigue strength of the component. The present study evaluates the influence of a straightening operation on fatigue strength and on the residual stress state of induction hardened shafts of steel 42CrMo4. A simplified FEM model was formulated. The model showed that the residual stress state was asymmetric along the circumference of a straightened shaft. Fatigue testing was performed in three point bending and showed that the fatigue strength was reduced by up to some 20 % by heavy straightening. A fracture mechanics model for fatigue crack growth and arrest was developed. The model could be used to predict the fatigue strength of a straightened shaft provided that the residual stress state was known.
Place, publisher, year, edition, pages
2012. Vol. 67, no 3, 179-187 p.
Straightening, induction hardening, fatigue strength, residual stress, 42CrMo4, fracture mechanics, fatigue crack growth and arrest
Metallurgy and Metallic Materials Tribology Production Engineering, Human Work Science and Ergonomics
Research subject SRA - Production
IdentifiersURN: urn:nbn:se:kth:diva-161228DOI: 10.3139/105.110149ScopusID: 2-s2.0-84864712982OAI: oai:DiVA.org:kth-161228DiVA: diva2:794281
FunderXPRES - Initiative for excellence in production research
QC 201503172015-03-112015-03-112015-04-13Bibliographically approved