Fatigue Behavior and Inclusion-Based Lifetime Prediction of 42CrMo4 Steel

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-01-09 DOI:10.1111/ffe.14521

Thomas Kirste, Alexander Schmiedel, Roman Morgenstern, Anja Weidner, Horst Biermann

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Abstract

Three variants of 42CrMo4 steel were investigated regarding the fatigue life at two test frequencies of 90 Hz and 20 kHz and temperatures up to 500°C. The materials varied in different levels of sulfur and oxygen content and steel cleanliness in terms of nonmetallic inclusions. The steels had a tempered martensitic microstructure with a hardness of 300 HV. A frequency dependence was observed only for the medium-sulfur steel, whereas for low- and high-sulfur levels, both test frequencies yielded in a common S-N curve. The fracture surface analysis of the fatigue specimens was compared with the inclusion rating done on unloaded samples. A correlation of both methods was observed by introducing a size factor. Based on the distribution functions and by using Murakami's approach of a projected area of an inclusion, a method was developed to predict the S-N curve. This offers the opportunity for an inclusion-based lifetime prediction.

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.