Machining-induced surface transformations of magnesium alloys to enhance corrosion resistance in human-like environment
Abstract
We report that magnesium alloys are becoming increasingly attractive for producing temporary prosthetic devices thanks to their bioresorbable characteristics in human body. However, their poor corrosion resistance to body fluids seriously limits their applicability. In this work, machining-induced surface transformations are explored as means to enhance corrosion resistance of AZ31 magnesium alloy. Surface characteristics including topography, residual stresses, wettability, microstructures and depth of transformed layer, were analysed and correlated to in-vitro corrosion resistance. Results showed that cryogenic machining at low feed provided the most promising corrosion reduction. Finally, thorough physical characterizations gave fundamental insights into possible drivers for this enhanced resistance.
- Authors:
-
[1];
[1];
[3]
- University of Padova (Italy). Department of Industrial Engineering
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
- The Ohio State Univ., Columbus, OH (United States). Department of Integrated Systems Engineering
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1435176
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- CIRP Annals
- Additional Journal Information:
- Journal Volume: 67; Journal Issue: 1; Journal ID: ISSN 0007-8506
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 42 ENGINEERING; Magnesium; Cryogenic machining; Surface integrity
Citation Formats
Bruschi, Stefania, Bertolini, Rachele, Ghiotti, Andrea, Savio, Enrico, Guo, Wei, and Shivpuri, Rajiv. Machining-induced surface transformations of magnesium alloys to enhance corrosion resistance in human-like environment. United States: N. p., 2018.
Web. doi:10.1016/j.cirp.2018.04.040.
Bruschi, Stefania, Bertolini, Rachele, Ghiotti, Andrea, Savio, Enrico, Guo, Wei, & Shivpuri, Rajiv. Machining-induced surface transformations of magnesium alloys to enhance corrosion resistance in human-like environment. United States. https://doi.org/10.1016/j.cirp.2018.04.040
Bruschi, Stefania, Bertolini, Rachele, Ghiotti, Andrea, Savio, Enrico, Guo, Wei, and Shivpuri, Rajiv. Sun .
"Machining-induced surface transformations of magnesium alloys to enhance corrosion resistance in human-like environment". United States. https://doi.org/10.1016/j.cirp.2018.04.040. https://www.osti.gov/servlets/purl/1435176.
@article{osti_1435176,
title = {Machining-induced surface transformations of magnesium alloys to enhance corrosion resistance in human-like environment},
author = {Bruschi, Stefania and Bertolini, Rachele and Ghiotti, Andrea and Savio, Enrico and Guo, Wei and Shivpuri, Rajiv},
abstractNote = {We report that magnesium alloys are becoming increasingly attractive for producing temporary prosthetic devices thanks to their bioresorbable characteristics in human body. However, their poor corrosion resistance to body fluids seriously limits their applicability. In this work, machining-induced surface transformations are explored as means to enhance corrosion resistance of AZ31 magnesium alloy. Surface characteristics including topography, residual stresses, wettability, microstructures and depth of transformed layer, were analysed and correlated to in-vitro corrosion resistance. Results showed that cryogenic machining at low feed provided the most promising corrosion reduction. Finally, thorough physical characterizations gave fundamental insights into possible drivers for this enhanced resistance.},
doi = {10.1016/j.cirp.2018.04.040},
journal = {CIRP Annals},
number = 1,
volume = 67,
place = {United States},
year = {Sun Apr 22 00:00:00 EDT 2018},
month = {Sun Apr 22 00:00:00 EDT 2018}
}
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