Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications

Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications

Abstract Lightweight, recyclable, and plentiful Mg alloys are receiving increased attention due to an exceptional combination of strength and ductility not possible from pure Mg. Yet, due to their alloying elements, such as rare-earths or aluminum, they are either not economical or biocompatible. He...

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Main Authors: Md Ershadul Alam, Soupitak Pal, Ray Decker, Nicholas C. Ferreri, Marko Knezevic, Irene. J. Beyerlein
Format: Article
Language:English
Published: Nature Publishing Group 2020-09-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-020-72374-z
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spelling doaj-e0ef9ec95ffc41eea4c3b570db365e622021-10-03T11:26:41ZengNature Publishing GroupScientific Reports2045-23222020-09-0110111510.1038/s41598-020-72374-zRare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical ApplicationsMd Ershadul Alam0Soupitak Pal1Ray Decker2Nicholas C. Ferreri3Marko Knezevic4Irene. J. Beyerlein5Departments of Mechanical Engineering, University of CaliforniaDepartments of Mechanical Engineering, University of CaliforniananoMAG LLCDepartment of Mechanical Engineering, University of New HampshireDepartment of Mechanical Engineering, University of New HampshireDepartments of Mechanical Engineering, University of CaliforniaAbstract Lightweight, recyclable, and plentiful Mg alloys are receiving increased attention due to an exceptional combination of strength and ductility not possible from pure Mg. Yet, due to their alloying elements, such as rare-earths or aluminum, they are either not economical or biocompatible. Here we present a new rare-earth and aluminum-free magnesium-based alloy, with trace amounts of Zn, Ca, and Mn (≈ 2% by wt.). We show that the dilute alloy exhibits outstanding high strength and high ductility compared to other dilute Mg alloys. By direct comparison with annealed material of the same chemistry and using transmission electron microscopy (TEM), high-resolution TEM (HR-TEM) and atom probe tomography analyses, we show that the high strength can be attributed to a number of very fine, Zn/Ca-containing nanoscale precipitates, along with ultra-fine grains. These findings show that forming a hierarchy of nanometer precipitates from just miniscule amounts of solute can invoke simultaneous high strength and ductility, producing an affordable, biocompatible Mg alloy.https://doi.org/10.1038/s41598-020-72374-z
collection DOAJ
language English
format Article
sources DOAJ
author Md Ershadul Alam
Soupitak Pal
Ray Decker
Nicholas C. Ferreri
Marko Knezevic
Irene. J. Beyerlein
spellingShingle Md Ershadul Alam
Soupitak Pal
Ray Decker
Nicholas C. Ferreri
Marko Knezevic
Irene. J. Beyerlein
Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications
Scientific Reports
author_facet Md Ershadul Alam
Soupitak Pal
Ray Decker
Nicholas C. Ferreri
Marko Knezevic
Irene. J. Beyerlein
author_sort Md Ershadul Alam
title Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications
title_short Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications
title_full Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications
title_fullStr Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications
title_full_unstemmed Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications
title_sort rare-earth- and aluminum-free, high strength dilute magnesium alloy for biomedical applications
publisher Nature Publishing Group
series Scientific Reports
issn 2045-2322
publishDate 2020-09-01
description Abstract Lightweight, recyclable, and plentiful Mg alloys are receiving increased attention due to an exceptional combination of strength and ductility not possible from pure Mg. Yet, due to their alloying elements, such as rare-earths or aluminum, they are either not economical or biocompatible. Here we present a new rare-earth and aluminum-free magnesium-based alloy, with trace amounts of Zn, Ca, and Mn (≈ 2% by wt.). We show that the dilute alloy exhibits outstanding high strength and high ductility compared to other dilute Mg alloys. By direct comparison with annealed material of the same chemistry and using transmission electron microscopy (TEM), high-resolution TEM (HR-TEM) and atom probe tomography analyses, we show that the high strength can be attributed to a number of very fine, Zn/Ca-containing nanoscale precipitates, along with ultra-fine grains. These findings show that forming a hierarchy of nanometer precipitates from just miniscule amounts of solute can invoke simultaneous high strength and ductility, producing an affordable, biocompatible Mg alloy.
url https://doi.org/10.1038/s41598-020-72374-z
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AT raydecker rareearthandaluminumfreehighstrengthdilutemagnesiumalloyforbiomedicalapplications
AT nicholascferreri rareearthandaluminumfreehighstrengthdilutemagnesiumalloyforbiomedicalapplications
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