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Nanoindentation into a metastable austenite triggers the martensitic phase transformation— An atomistic study

  • Indentation into a metastable austenite may induce the phase transformation to the bcc phase. We study this process using atomistic simulation. At temperatures low compared to the equilibrium transformation temperature, the indentation triggers the transformation of the entire crystallite: after starting the transformation, it rapidly proceeds throughout the simulation crystallite. The microstructure of the transformed sample is characterized by twinned grains. At higher temperatures, around the equilibrium transformation temperature, the crystal transforms only locally, in the vicinity of the indent pit. In addition, the indenter produces dislocation plasticity in the remaining austenite. At intermediate temperatures, the crystal continuously transforms throughout the indentation process.

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Author:Jerome Meiser, Iyad Alabd Alhafez, Tilmann Beck, Marek Smaga, Ralf Müller, Herbert M. Urbassek
URN (permanent link):urn:nbn:de:hbz:386-kluedo-55375
Publisher:American Institute of Physics
Document Type:Article
Language of publication:English
Publication Date:2019/01/29
Year of Publication:2019
Publishing Institute:Technische Universität Kaiserslautern
Creating Corporation:Technische Universität Kaiserslautern
Date of the Publication (Server):2019/03/04
Issue:9 / AIP Advances
Number of page:7
Faculties / Organisational entities:Fachbereich Physik
DDC-Cassification:5 Naturwissenschaften und Mathematik / 530 Physik
Licence (German):Zweitveröffentlichung