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Dendritic coarsening model for rapid solidification of Ni-superalloy via electrospark deposition

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1-s2.0-S0924013618301286-main.pdf (927.62 KB)

Date

2018-08-01

Authors

Enrique, Pablo D.
Jiao, Zhen
Zhou, Norman Y.
Toyserkani, Ehsan

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

Control of splat thickness in an electrospark deposition (ESD) process can be used to improve the mechanical properties of deposited Inconel 718. The lower cooling rates of thicker deposition splats obtained through higher energy ESD parameters result in greater subgrain coarsening and lower microhardness. A subgrain growth model and Hall-Petch relationship are used to quantify the extent of subgrain coarsening and the influence of splat thickness on hardness, with a 4.5 times reduction in splat thickness achieving a 20% increase in microhardness.

Description

The final publication is available at Elsevier via http://dx.doi.org/10.1016/j.jmatprotec.2018.03.023 © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

Cellular dendritic subgrain, Electrospark deposition, Microhardness, Microstructure, Nickel superalloy

LC Keywords

Citation

URI

http://dx.doi.org/10.1016/j.jmatprotec.2018.03.023
 http://hdl.handle.net/10012/13279

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Waterloo Research
Mechanical and Mechatronics Engineering