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Updated: Jun 30, 2025

Generating Lap Joints Via Friction Stir Spot Welding on DP780 Steel
Published on: August 13, 2019
Considering the influence of heating rate, complex hardening and dynamic strain aging in AISI 1045 machining:
Friedrich Bleicher1, Christian Baumann1, Stephan Krall1
1Institute of Production Engineering and Photonic Technologies, TU Wien, Austria.
Abstract:
In the modelling of machining operations, constitutive models must consider the material behavior subject to high plastic strains, high strain rates, high temperatures and high heating rates. A new material model for AISI 1045, which captures time-dependent plastic response associated with interrupted austenite transformation under short (sub-second) heating times, is deployed to simulate orthogonal cutting experiments. High speed video and digital image correlation measurements are used to capture chip behavior. The new model, which also includes complex strain hardening and dynamic strain aging effects, show better agreement with experiments at high cutting speeds compared with a basic Johnson-Cook material model from the literature.
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