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On the Influence of Control Type and Strain Rate on the Lifetime of 50CrMo4

Geilen, Max Benedikt ; Schönherr, Josef Arthur ; Klein, Marcus ; Leininger, Dominik Sebastian ; Giertler, Alexander ; Krupp, Ulrich ; Oechsner, Matthias (2021):
On the Influence of Control Type and Strain Rate on the Lifetime of 50CrMo4. (Publisher's Version)
In: Metals, 10 (11), MDPI, e-ISSN 2075-4701,
DOI: 10.26083/tuprints-00019270,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: On the Influence of Control Type and Strain Rate on the Lifetime of 50CrMo4
Language: English
Abstract:

In this study, we investigate the influence of control type and strain rate on the lifetime of specimens manufactured from 50CrMo4. This influence is described by a strain rate dependent method that uses cyclic stress strain curves to correct displacement-controlled cyclic test results. The objective of this correction is to eliminate the stress related differences between displacement-controlled cyclic test results and force-controlled cyclic test results. The method is applied to the results of ultrasonic fatigue tests of six different combinations of heat treatment, specimen geometry (notch factor) and atmosphere. In a statistical analysis, the corrected results show an improved agreement with test results obtained on conventional fatigue testing equipment with similar specimens: the standard deviation in combined data sets is significantly reduced (p = 4.1%). We discuss the literature on intrinsic and extrinsic strain rate effects in carbon steels.

Journal or Publication Title: Metals
Journal volume: 10
Number: 11
Publisher: MDPI
Collation: 28 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
Divisions: 16 Department of Mechanical Engineering > Center for Engineering Materials, State Materials Testing Institute Darmstadt (MPA) Chair and Institute for Materials Technology (IfW)
Date Deposited: 09 Aug 2021 07:49
Last Modified: 09 Aug 2021 07:50
DOI: 10.26083/tuprints-00019270
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-192700
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19270
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