Induction heat treatment of sheet-bulk metal-formed parts assisted by water-air spray cooling

Besserer HB, Dalinger A, Rodman D, Nuernberger F, Hildenbrand P, Merklein M, Maier HJ (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Steel Research International Wiley-VCH Verlag

Publisher: Wiley-VCH Verlag

Book Volume: 87

Pages Range: 1220-1227

Journal Issue: 9

DOI: 10.1002/srin.201500404

Abstract

In order to produce components with massive secondary functional elements from sheet metal bulk forming operations, termed sheet-bulk metal forming, can be applied. Owing to high, three-dimensional stress and strain states present during sheet-bulk metal forming, ductile damage occurs in the form of micro-voids. Depending on the material flow properties, tensile residual stresses can also be present in the components' formed functional elements. During service, the components are subjected to cyclic loading via these functional elements, and tensile residual stresses exert an unfavorable influence on crack initiation and crack growth, and therefore on the fatigue life. Following the forming process, temperature and microstructurally related compressive residual stresses can be induced by local heat treating of the surface. These residual stresses can counteract potential crack initiation on the surface or in the subsurface regions. In the present study, the adjustability of the residual stress state is investigated using a workpiece manufactured by orbital cold-forming, which possesses an accumulation of material in its edge region. Based on residual stress measurements in the workpiece's edge region using x-ray diffractometry, it is possible to verify the compressive residual stresses adjusted by varying the cooling conditions.

Authors with CRIS profile

Philipp Hildenbrand Institute of Manufacturing Technology Marion Merklein Institute of Manufacturing Technology

Additional Organisation(s)

Institute of Manufacturing Technology

Related research project(s)

Manufacturing of tailored blanks by orbital forming and flexible rolling (SFB/TR73 - A1/1) Umformtechnische Herstellung von komplexen Funktionsbauteilen mit Nebenformelementen aus Feinblechen - Blechmassivumformung Jan. 1, 2016 - March 31, 2021

Involved external institutions

Gottfried Wilhelm Leibniz Universität Hannover DE Germany (DE)

How to cite

APA:

Besserer, H.-B., Dalinger, A., Rodman, D., Nuernberger, F., Hildenbrand, P., Merklein, M., & Maier, H.J. (2016). Induction heat treatment of sheet-bulk metal-formed parts assisted by water-air spray cooling. Steel Research International, 87(9), 1220-1227. https://doi.org/10.1002/srin.201500404

MLA:

Besserer, Hans-Bernward, et al. "Induction heat treatment of sheet-bulk metal-formed parts assisted by water-air spray cooling." Steel Research International 87.9 (2016): 1220-1227.

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