Influence of intrinsic strain on irradiation induced damage: the role of threshold displacement and surface binding energies

Guenole J, Prakash A, Bitzek E (2016)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2016

Journal

Materials and Design Elsevier

Publisher: Elsevier Ltd

Book Volume: 111

Pages Range: 405-413

DOI: 10.1016/j.matdes.2016.08.077

Abstract

Focused ion beam (FIB) machining has become a standard tool for sample preparation and in combination with digital image correlation (DIC) for the evaluation of local intrinsic stresses by measuring strain relaxation. However, FIB milling always leads to irradiation damage of the material. Current models for the formation of irradiation damage and the sputter yield are based on two key parameters, the threshold displacement energy (TDE) and surface binding energy (SBE), which are usually determined from unstrained systems with idealized surfaces. Here we use atomistic simulations to determine the TDE and SBE for strained silicon and aluminum and compare the results to full cascade simulations. A clear, material class dependent influence of the strain state on the TDE is observed, and surface amorphisation is shown to significantly increase the SBE of {001} surfaces.

Authors with CRIS profile

Julien Guenole Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Aruna Prakash Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Erik Bitzek Professur für Datenbasierte Materialmodellierung

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

Plastic deformation, crack nucleation and fracture in lightweight intermetallic composite materials (EXC315 EAM (A3-7)) Exzellenz-Cluster Engineering of Advanced Materials Nov. 1, 2007 - Oct. 31, 2017 Pre-standardisation of incremental FIB micro-milling for intrinsic stress evaluation at the sub-micron scale (ISTRESS) Pre-standardisation of incremental FIB micro-milling for intrinsic stress evaluation at the sub-micron scale Jan. 1, 2014 - Dec. 31, 2016

How to cite

APA:

Guenole, J., Prakash, A., & Bitzek, E. (2016). Influence of intrinsic strain on irradiation induced damage: the role of threshold displacement and surface binding energies. Materials and Design, 111, 405-413. https://doi.org/10.1016/j.matdes.2016.08.077

MLA:

Guenole, Julien, Aruna Prakash, and Erik Bitzek. "Influence of intrinsic strain on irradiation induced damage: the role of threshold displacement and surface binding energies." Materials and Design 111 (2016): 405-413.

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