Eigenspannungen in Werkzeugen und Bauteilen bei thermo-mechanisch gekoppelten Umformprozessen
- Resource Type
- research-article
- Authors
- Grüning, A.; Lebsanft, M.; Scholtes, B.
- Source
- HTM Journal of Heat Treatment and Materials. 66(1):30-36
- Subject
- Werkzeugstahl
Eigenspannungen
Thermoerm—dung
thermomechanische Umformung
tool steel
residual stress
thermal fatigue
thermo-mechanically coupled forming process
Fachbeiträge/Technical Contributions
- Language
- German
- ISSN
- 2194-1831
1867-2493
Residual stresses are an important factor in thermomechanically coupled forming processes applied for industrial mass production of e.g. axles and shafts. They are an unavoidable consequence of the alternating inhomogeneous fields of temperature and mechanical stress developing in tools and components dependent on the process parameters applied. Because of their influence on the behavior of the components produced, a great interest exists to get reliable information about origin and distribution of the relevant residual stress fields and to understand the basic principles of their formation. In this paper the development of residual stress in tools (AISI H11) used for the thermo-mechanical forming operations of cylindrical flange shafts (SAE 6150) is outlined. The loading situation of the tool is simulated by thermal fatigue tests, providing information about cyclic stress and plastic deformation during the manufacturing process. Furthermore the residual stress states, measured by X-Ray diffraction as well as neutron diffraction of the flange shafts manufactured are presented and discussed. Chip forming manufacturing operations of the inhomogeneous microstructures are challenging tasks and tensile residual stresses can be avoided using adapted process parameters.