Book ChapterDOI
Residual Stress State in Tools Used for Thermo-mechanical Metal Forming Processes
A. Gruening,M. Lebsanft,Berthold Scholtes +2 more
- pp 39-45
TLDR
In this paper, the development of residual stress in tools (steel AISI H11) used for the thermo-mechanical forming operation of cylindrical flange shafts (steel SAE 6150) is outlined.Abstract:
In thermo-mechanically coupled forming processes for industrial mass production residual stresses 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. Hence, a considerable 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. By way of example a metal forming process based on a predefined locally and temporally differential temperature profile is described, which leads to a characteristic materials property profile and geometrical shape. The development of residual stress in tools (steel AISI H11) used for the thermo-mechanical forming operation of cylindrical flange shafts (steel SAE 6150) is outlined. To this end residual stress analyses by X-ray as well as by neutron diffraction were carried out. The loading situation of the tool was simulated by isothermal, thermal and contact fatigue tests, providing information about cyclic stress and plastic deformation during the manufacturing process.read more
Citations
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Journal ArticleDOI
Neutron Residual Strain Surface Scans - Experimental Results and Monte Carlo Simulations
TL;DR: In this paper, a series of Monte Carlo simulations using the software package RESTRAX/SIMRES were carried out to simulate the peak shift as a function of gauge volume depth, monochromator curvature and other instrumental parameters, which can be used to quickly optimise the experimental setup for direct measuring residual strains near the sample surface at an arbitrary surface orientation.
Journal ArticleDOI
Thermal strengthening treatment of low-rigid lead screws
Journal ArticleDOI
Thermal power treatment of step shafts
TL;DR: In this article, the design of thermal power units for performing thermal operations of hardening and tempering of non-rigid parts of the “shaft” type is discussed.
Journal ArticleDOI
Thermal power stabilization of shapes of non-rigid shafts
TL;DR: In this article, the design of thermal power units for performing thermal operations of hardening and tempering of non-rigid parts of the "shaft" type is discussed.
References
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Book
Structural and residual stress analysis by nondestructive methods : evaluation, application, assessment
V. Hauk,H. Behnken +1 more
TL;DR: In this paper, Theiner assesses residual stresses, B. Scholtes and E. Schneider micromagnetic techniques, W.A. Theiner et al., V. Hauk et al. and L. Pintschovius ultrasonic techniques.
Journal ArticleDOI
Thermo fatigue cracking of die casting dies
TL;DR: In this article, a vast analysis of thermal fatigue cracks in aluminium alloy die casting is done using immersion test apparatus, which enables simulation of conditions during aluminium Alloy die casting and enables controlled thermal fatigue testing of materials.
Journal ArticleDOI
Cyclic stress–strain behavior and damage of tool steel AISI H11 under isothermal and thermal fatigue conditions
TL;DR: In this article, results of isothermal and out-of-phase thermal fatigue tests of tool steel AISI H11 (German grade X38CrMoV5-1) in the temperature range 100°C to 650°C were presented.
Journal Article
Thermal fatigue cracking of die-casting dies
Book ChapterDOI
6 – Assessment of residual stresses
TL;DR: In this article, the influence of residual stresses on the fracture load of center cracked specimens was investigated over a wide range of temperatures, taking into account the consequences of multi-axiality of stress states on strength and failure.