PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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Procedia Structural Integrity 23 (2019) 366–371

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. Nanocrys alline (nc) immiscible Co-Cu alloys syste is promis ng material where the decomposition f the super-saturated olid solution can be used to obtain nano-structured materials. In this research, homogenous and solid c Co-Cu thi k film sy thesized through the puls d electrodeposition technique in complex odium tartrate electrolyte. Annealing procedures were condu ted to evaluate its th rmal stability and induce phase de o positio of cobalt and copper, whi h can be utilized to enhance mechanical properties and th rmal stability. Initial cyclic micro-bending experiments were also conducted to observe micro-fatigue properties and structural evolution during mechanical loading. © 201 9 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture Thermal stability, phase decomposition, and micro-fatigue properties of pulsed electrodeposited nanocrystalline Co-Cu K. Pratama a,d, *, F. Kunz a , L. Lindner a , J. Schmauch b , F. Mücklich c , C. Motz a a Chair of Materials Science and Methods, Saarland University, Saarbrücken 66123, Germany. b Chair of Experimental Physics, Saarland University, Saarbrücken 66 123, Germany. c Chair of Functional Materials, Saarland University, Saarbrücken 66123, Germany . d Department of Metallurgical Engineering, Institute Technology of Bandung, Bandung 40132, Indonesia. 9th International Conference on Materials Structure and Micromechanics of Fracture Thermal stability, phase decomposition, and micro-fatigue properties of pulsed electrodeposited nanocrystalline Co-Cu K. Pratama a,d, *, F. Kunz a , L. Lindner a , J. Schmauch b , F. Mücklich c , C. Motz a a Chair of Materials Sci ce and Methods, Saarla d Un versity, Saarbrücken 66123, Germany. b Exper mental Physic c Chair of Funct onal Mat rials, Saarland University, Saarbrücken 66123, Germany . d Department of Metallurgical Engineering, Institute Technology of Bandung, Bandung 40132, Indonesia. Abstract Abstract Nanocrystalline (nc) immiscible Co-Cu alloys system is a promising material where the decomposition of the super-saturated solid solution can be used to obtain nano-structured materials. In this research, homogenous and solid nc Co-Cu thick films were synthesized through the pulsed electrodeposition technique in complex sodium tartrate electrolyte. Annealing procedures were conducted to evaluate its thermal stability and induce phase decomposition of cobalt and copper, which can be utilized to enhance mechanical properties and thermal stability. Initial cyclic micro-bending experiments were also conducted to observe micro-fatigue properties and structural evolution during mechanical loading.

Keywords: nanocrystalline; thermal stability; phase decomposition; cyclic micro-bending Keywords: nanocrystalline; thermal stability; phase decomposition; cyclic micro-bending

1. Introduction 1. Introduction

Nanocrystalline (nc) materials have outstanding mechanical and physical properties (Gleiter (1989); Meyers et al. (2006)). However, these types of materials are thermally and mechanically unstable and improvements are necessary for wide range applications. Many experiments have been conducted to improve the thermal stability of nc materials, for example, through the addition of alloying elements (Bachmaier and Motz (2014)), through the addition of second Nanocrystalline (nc) materials have outstanding echa ical and physical properties (Gleiter (1989); Mey rs et al. (2006)). How ver, these types of materials are t ermally and me hanically unstable and improvements are necess ry f r wide range applications. Many experiments have been conducted to improve the thermal stability of nc mat rials, for example, through the addition of alloying elements (Bachmaier and Motz (2014)), through the addition of second

* Corresponding author. Tel.: +49 (681) 302-5001; fax: +49 (681) 302-5015. E-mail address: k.pratama@matsci.uni-sb.de * Correspon ing author. Tel.: +49 (681) 302-5001; fax: +49 (681) 302-5015. E-mail address: k.pratama@matsci.uni-sb.de

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.114