Fatigue Life for Different Stress Concentration Factors for Stainless Steel 1.4301

Przemysław Strzelecki,Małgorzata Słomion,Adam Mazurkiewicz,Tomasz Tomaszewski,Janusz Musiał

doi:10.3390/ma12223677

Przemysław Strzelecki, Małgorzata Słomion + Show 3 more

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https://doi.org/10.3390/ma12223677

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Abstract

This paper presents the results of the static tensile and fatigue life tests under rotating bending of round 1.4301 (AISI 304) steel samples. The fatigue tests were carried out on smooth and notched samples with three different rounding angles with a shape factor of 1.4, 2 and 2.6. A fatigue life was determined for samples with different shape factors subject to identical loads. The results showed that the scatter of fatigue test results decreases with an increase in shape factor. To evaluate the cracking properties (cracking mode and mechanism), microstructure and fractographic tests of the fractured samples were carried out.

Highlights

The use of stainless steel in engineering has grown significantly in recent years
To determine the fatigue life of a material, an S–N curve is often determined for the smooth samples and a stress concentration factor is calculated to correct the results for a specific structural component [8]
The smooth samples for fatigue life depends on the geometry of the components

Summary

Introduction

The use of stainless steel in engineering has grown significantly in recent years. In 2018, the use of stainless steel in the industry has grown over 60% compared to 2010 [1], estimated at 50.7 Mt [2].Due to the common use of this material in engineering, tests to evaluate its structure and properties are crucial. The use of stainless steel in engineering has grown significantly in recent years. In 2018, the use of stainless steel in the industry has grown over 60% compared to 2010 [1], estimated at 50.7 Mt [2]. Due to the common use of this material in engineering, tests to evaluate its structure and properties are crucial. Since the material is often used in mechanical engineering, evaluation of its basic mechanical properties, including tensile strength and fatigue life, is crucial. To determine the fatigue life of a material, an S–N curve (stress vs number of cycles) is often determined for the smooth samples and a stress concentration factor is calculated to correct the results for a specific structural component [8]. The last square method is the most simple and commonly used method to estimate model parameters and it is presented in standard [12] and [13]

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