SteBLife, a New Approach for the Accelerated Generation of Metallic Materials’ Fatigue Data

Metals

Fabian Weber¹  RamananSridaran Venkat¹  Haoran Wu²  Ruth Acosta²  Peter Starke²  Frank Walther³  Jochen Tenkamp³ 

[1] Chair of Nondestructive Testing and Quality Assurance (LZfPQ), Saarland University, Am Markt 4., D-66125 Saarbrücken, Germany;Department of Materials Science and Materials Testing (WWHK), University of Applied Sciences Kaiserslautern, Schoenstraße 11, D-67659 Kaiserslautern, Germany;Department of Materials Test Engineering (WPT), TU Dortmund University, Baroper Str. 303, D-44227 Dortmund, Germany;

关键词: fatigue life evaluation;    SteBLife;    thermography;    magnetic–based measurements;   

DOI  :  10.3390/met10060798

来源: DOAJ

【 摘 要 】

The service life of materials and components exposed to repeated mechanical loads is limited, which is why the understanding of the damage evolution and estimating its fatigue life is of high importance for its technical application. This paper shows how temperature and magnetic field measurement methods can be used to describe the cyclic deformation behaviour of metallic materials and to derive parameters from this, which are used in short–term methods to calculate the fatigue life. Within the SteBLife (stepped–bar fatigue life) approach, only three to five fatigue tests with a stepped fatigue specimen are required to determine a complete S–N or Woehler curve with scatter bands for different failure probabilities. If only a trend S–N curve is required, the number of tests can be reduced to a single fatigue test only. In the framework of this paper, these approaches will be presented for normalised SAE 1045 (C45E) and quenched and tempered SAE 4140 (42CrMo4) steels.

【 授权许可】

Unknown