Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr Alloy
Developing high strength and high ductility magnesium alloys is an important issue for weight-reduction applications. In this work, we explored the feasibility of manipulating nanosized precipitates on LPSO-contained (long period stacking ordered phase) ultra-fine grained (UFG) magnesium alloy to ob...
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doaj-51e978152383419b842d6171fae7f80e2020-11-24T22:47:20ZengMDPI AGMetals2075-47012018-08-018965810.3390/met8090658met8090658Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr AlloyHuan Liu0He Huang1Ce Wang2Jia Ju3Jiapeng Sun4Yuna Wu5Jinghua Jiang6Aibin Ma7College of Mechanics and Materials, Hohai University, Nanjing 211100, ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 211100, ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 211100, ChinaCollege of Materials Engineering, Nanjing Institute of Technology, Nanjing 211167, ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 211100, ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 211100, ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 211100, ChinaCollege of Mechanics and Materials, Hohai University, Nanjing 211100, ChinaDeveloping high strength and high ductility magnesium alloys is an important issue for weight-reduction applications. In this work, we explored the feasibility of manipulating nanosized precipitates on LPSO-contained (long period stacking ordered phase) ultra-fine grained (UFG) magnesium alloy to obtain simultaneously improved strength and ductility. The effect of two aging treatments on microstructures and mechanical properties of an UFG Mg-10Y-6Gd-1.5Zn-0.5Zr alloy was systematically investigated and compared by a series of microstructure characterization techniques and tensile test. The results showed that nano γ’’ precipitates were successfully introduced in T5 peak aged alloy with no obvious increase in grain size. While T6 peak aging treatment stimulated the growth of α-Mg grains to 4.3 μm (fine grained, FG), together with the precipitation of γ’’ precipitates. Tensile tests revealed that both aging treatments remarkably improved the strengths but impaired the ductility slightly. The T5 peak aged alloy exhibited the optimum mechanical properties with ultimate strength of 431 MPa and elongation of 13.5%. This work provided a novel strategy to simultaneously improve the strength and ductility of magnesium alloys by integrating the intense precipitation strengthening with ductile LPSO-contained UFG/FG microstructure.http://www.mdpi.com/2075-4701/8/9/658Mg-10Y-6Gd-1.5Zn-0.5Zrultra-fine grainaging treatmentprecipitation behaviormechanical property |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Huan Liu He Huang Ce Wang Jia Ju Jiapeng Sun Yuna Wu Jinghua Jiang Aibin Ma |
spellingShingle |
Huan Liu He Huang Ce Wang Jia Ju Jiapeng Sun Yuna Wu Jinghua Jiang Aibin Ma Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr Alloy Metals Mg-10Y-6Gd-1.5Zn-0.5Zr ultra-fine grain aging treatment precipitation behavior mechanical property |
author_facet |
Huan Liu He Huang Ce Wang Jia Ju Jiapeng Sun Yuna Wu Jinghua Jiang Aibin Ma |
author_sort |
Huan Liu |
title |
Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr Alloy |
title_short |
Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr Alloy |
title_full |
Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr Alloy |
title_fullStr |
Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr Alloy |
title_full_unstemmed |
Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr Alloy |
title_sort |
comparative study of two aging treatments on microstructure and mechanical properties of an ultra-fine grained mg-10y-6gd-1.5zn-0.5zr alloy |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2018-08-01 |
description |
Developing high strength and high ductility magnesium alloys is an important issue for weight-reduction applications. In this work, we explored the feasibility of manipulating nanosized precipitates on LPSO-contained (long period stacking ordered phase) ultra-fine grained (UFG) magnesium alloy to obtain simultaneously improved strength and ductility. The effect of two aging treatments on microstructures and mechanical properties of an UFG Mg-10Y-6Gd-1.5Zn-0.5Zr alloy was systematically investigated and compared by a series of microstructure characterization techniques and tensile test. The results showed that nano γ’’ precipitates were successfully introduced in T5 peak aged alloy with no obvious increase in grain size. While T6 peak aging treatment stimulated the growth of α-Mg grains to 4.3 μm (fine grained, FG), together with the precipitation of γ’’ precipitates. Tensile tests revealed that both aging treatments remarkably improved the strengths but impaired the ductility slightly. The T5 peak aged alloy exhibited the optimum mechanical properties with ultimate strength of 431 MPa and elongation of 13.5%. This work provided a novel strategy to simultaneously improve the strength and ductility of magnesium alloys by integrating the intense precipitation strengthening with ductile LPSO-contained UFG/FG microstructure. |
topic |
Mg-10Y-6Gd-1.5Zn-0.5Zr ultra-fine grain aging treatment precipitation behavior mechanical property |
url |
http://www.mdpi.com/2075-4701/8/9/658 |
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