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

被引：7

作者：

Teschke, Mirko ^{[1
]}

Koch, Alexander ^{[1
]}

Walther, Frank ^{[1
]}

机构：

[1] TU Dortmund Univ, Dept Mat Test Engn WPT, Baroper Str 303, D-44227 Dortmund, Germany

来源：

MATERIALS | 2020年 / 13卷 / 03期

关键词：

magnesium; fatigue; compression; rare earth; AE42; DieMag422; tensile test; compression test; ratcheting; high temperature; YIELD ASYMMETRY; CREEP-BEHAVIOR; RARE-EARTH; STAINLESS-STEEL; MG ALLOY; DEFORMATION; MG-4AL-2BA-2CA; MICROSTRUCTURE; MECHANISM; CALCIUM;

D O I：

10.3390/ma13030497

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页数：15

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