Surface integrity investigations for prediction of fatigue properties after machining of alloy 718
Journal article, 2021

Fatigue performance is crucial for gas turbine components, and it is greatly affected by the manufacturing processes. Ability to predict the expected fatigue life of a component based on surface integrity has been the objective in this work, enabling new processing methods.

Alloy 718 samples were prepared by different machining setups, evaluated in fatigue testing and surface integrity investigations. These results generated two predictive statistical multi-variate regression models.

The fatigue correlated well with roughness, residual stresses and deformation. The two models showed great potential, which encourages further exploration to fine-tune the procedure for the particular case.


Surface integrity

Fatigue prediction

Alloy 718

Non-conventional machining


Jonas Holmberg

RISE Research Institutes of Sweden

University West

Anders Wretland

GKN Aerospace Sweden

Peter Hammersberg

Chalmers, Industrial and Materials Science, Engineering Materials

Johan Berglund

RISE Research Institutes of Sweden

Alfredo Suárez


Tomas Beno

University West

International Journal of Fatigue

0142-1123 (ISSN)

Vol. 144 106059

Miljöanpassade flygmotordemonstratorer för ökad konkurrenskraft (SWE DEMO MOTOR)

VINNOVA (2015-06047), 2016-01-01 -- 2016-08-31.

Driving Forces

Sustainable development

Subject Categories

Applied Mechanics

Manufacturing, Surface and Joining Technology

Other Materials Engineering

Areas of Advance


Materials Science



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