Work

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Year: 2026

Type: article

Abstract: The aluminum alloy EN AW‐2618A is a high‐strength, precipitation‐hardened material developed for applications at elevated temperatures. In service, components such as radial compressor wheels and pistons are exposed to thermal conditions that cause microstructural overaging, leading to mechanical softening. With future exhaust gas turbochargers expected to operate at temperatures up to 230°C and with increasing demands for efficiency and compression ratio, reliable data on fatigue behavior under these conditions is essential but currently lacking. This study aims to close this gap by conducting fully reversed ( R = −1) high‐cycle fatigue (HCF) tests at room temperature and at 230°C on specimens in an overaged condition (1000 h at 230°C), simulating the degradation that occurs in service due to the coarsening of the strengthening S‐phase. Additionally, the influence of test frequency on fatigue performance is investigated.

Source: Advanced Engineering Materials

DOI: 10.1002/adem.202503187

Authors: Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki

Institutions: Federal Institute For Materials Research and Testing, Fraunhofer Institute for Mechanics of Materials

Language: English

Topic: Fatigue and fracture mechanics

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,520

Funder: Bundesministerium für Wirtschaft und Klimaschutz