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      Comparison of High-Temperature Compression and Compression-Compression Fatigue Behavior of Magnesium Alloys DieMag422 and AE42

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          Abstract

          Due to their high strength-to-weight-ratio, magnesium alloys are very attractive for use in automotive engineering. For application at elevated temperatures, the alloys must be creep-resistant. Therefore, the influence of the operating temperature on the material properties under quasistatic and cyclic load has to be understood. A previous study investigated tensile-tensile fatigue behavior of the magnesium alloys DieMag422 and AE42 at room temperature (RT). The aim of this study was the comparison of both alloys regarding compression, tensile, and compression-compression fatigue behavior. The quasistatic behavior was determined by means of tensile and compression tests, and the tensile-compression asymmetry was analyzed. In temperature increase fatigue tests (TIFT) and constant amplitude tests (CAT), the temperature influence on the cyclic creeping (ratcheting) behavior was investigated, and mechanisms-relevant test temperatures were determined. Furthermore, characteristic fracture mechanisms were evaluated with investigations of the microstructure and the fracture surfaces. The initial material was analyzed in computed tomographic scans and energy dispersive X-ray (EDX) analyses.

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          Temperature dependency of slip and twinning in plane strain compressed magnesium single crystals

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            Creep Resistant Magnesium Alloys for Powertrain Applications

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              Microstructure and creep behavior in AE42 magnesium die-casting alloy

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                21 January 2020
                February 2020
                : 13
                : 3
                : 497
                Affiliations
                Department of Materials Test Engineering (WPT), TU Dortmund University, Baroper Str. 303, D-44227 Dortmund, Germany; alexander3.koch@ 123456tu-dortmund.de (A.K.); frank.walther@ 123456tu-dortmund.de (F.W.)
                Author notes
                [* ]Correspondence: mirko.teschke@ 123456tu-dortmund.de ; Tel.: +49-231-755-8040
                Author information
                https://orcid.org/0000-0002-9960-735X
                https://orcid.org/0000-0001-7017-133X
                https://orcid.org/0000-0003-2287-2099
                Article
                materials-13-00497
                10.3390/ma13030497
                7040637
                31972996
                691a3cf0-3c72-4835-a75c-77e6e824ccb1
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 16 December 2019
                : 15 January 2020
                Categories
                Article

                magnesium,fatigue,compression,rare earth,ae42,diemag422,tensile test,compression test,ratcheting,high temperature

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