Influence of the Preforming Material State in Common Tribological Tests

Bastian Zimmermann; Marion Merklein

doi:10.4028/www.scientific.net/AMR.1140.75

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Optimization of the Modified Yoshida Buckling Test to Investigate the Influence of Curvature
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Influence of the Preforming Material State in Common Tribological Tests
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New Approach for Closed Loop Control of Deep Drawing Process for a Control Intervention during Deep Drawing Stroke
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Prediction and Detection of Wear Mechanisms on an Industry-Oriented Hot Forging Die
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Influence of the Preforming Material State in Common Tribological Tests

Abstract:

Different tests to determine friction factors for cold forging processes are given in the literature. The double cup extrusion test, the ring compression test and the T-shape compression test are three of the common tests, which are compared in this investigation. From former investigations it is known that there is an influence of the work-hardening of the test sample on the friction factor, which is determined by the test. At this study, the influence of the work-hardening of the material on the three named tests is investigated by using a wire drawing process. In addition, the drawn wire from the originally thermo mechanical rolled wire is also annealed to have a second material state without any work-hardening. The used material and its numerical modelling as well as the analyzed tribological conditions of the real specimens are described. Afterwards the three test setups are explained for the numerical as well as for the real experiments. In the end, the influence of the drawing respectively the work-hardening for the three tests is presented and discussed.

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Periodical:

Advanced Materials Research (Volume 1140)

Pages:

75-82

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1140.75

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Online since:

August 2016

Authors:

Bastian Zimmermann*, Marion Merklein

Keywords:

Forging, Friction, Tribology

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