Microstructure evolution of the Gleeble-simulated heat-affected zone of Ni-based superalloy
Paper in proceedings, 2019

The formation of liquation cracking in a simulated heat affected zone of René108 is reported.
The stress controlled thermo-mechanical experiments were carried out on a Gleeble®3800 testing system.
The base alloy was lost-wax cast and then solution treated and aged. Light and scanning electron
microscopy of this material revealed high volume fraction of γ' precipitates in the dendrite arms and residual
eutectic γ/γ' islands in the interdendritic areas. As a result of short-term exposure to high homologous
temperature, the volume fraction of γ' phase was significantly decreased due to the dissolution of
precipitates in the surrounding matrix. The thin non-equilibrium liquid film, formed locally along grain
boundaries, was a key-factor favoring initiation of cracks and their spreading during the Gleeble testing.
The liquid appeared as a result of constitutional liquation, mainly of the γ' precipitates.

Author

Łukasz Rakoczy

AGH University of Science and Technology

Fabian Hanning

Chalmers, Industrial and Materials Science, Materials and manufacture

Joel Andersson

University West

Małgorzata Grudzień-Rakoczy

Lukasiewicz Research Network-Foundry Research Institute

Rafal Cygan

Consolidated Precision Products Corporation

Anna Zielińska-Lipiec

AGH University of Science and Technology

Power Transmissions 2019 Proceedings

Vol. 3

6th International BAPT Conference - Power Transmissions 2019
Varna, Bulgaria,

Subject Categories

Manufacturing, Surface and Joining Technology

Other Materials Engineering

Metallurgy and Metallic Materials

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Materials Science

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9/18/2020