A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline Mg alloys
This work aims to understand the inefficiency of nanoprecipitates to strengthen a weakly textured, polycrystalline Mg-Gd-Y-Zr alloy. An experimental micromechanical approach consisting on micropillar compression combined with analytical electron microscopy is put in place to analyze the effect of na...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2023-05-01
|
| Series: | Journal of Magnesium and Alloys |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956721002632 |
| _version_ | 1797203884776620032 |
|---|---|
| author | X.Z. Jin W.C. Xu D.B. Shan B. Guo B. Jin M.T. Pérez-Prado |
| author_facet | X.Z. Jin W.C. Xu D.B. Shan B. Guo B. Jin M.T. Pérez-Prado |
| author_sort | X.Z. Jin |
| collection | DOAJ |
| description | This work aims to understand the inefficiency of nanoprecipitates to strengthen a weakly textured, polycrystalline Mg-Gd-Y-Zr alloy. An experimental micromechanical approach consisting on micropillar compression combined with analytical electron microscopy is put in place to analyze the effect of nanoprecipitation on soft and hard basal slip and twinning in individual grains with different orientations. This study shows that, in grains that are favorably oriented for basal slip (“soft” basal slip), aging leads to extreme localization due to the ability of basal dislocations to shear the nanoparticles, resulting overall in the softening of basal systems. Additionally, in grains in which the c-axis is almost perpendicular to the compression axis, prismatic slip dominates deformation in the solid solution state and nanoprecipitation favors twinning due to the concomitant lattice solute depletion. Finally, in grains oriented with their c-axis making an angle of about 5–7° with respect to the compression axis, which deform mainly by “hard” basal slip, precipitation leads to the strengthening of basal systems in the absence of obvious localization. This work reveals that the poor hardening response of the polycrystalline alloy is related to the capability of basal dislocations to shear the nanoparticles, in the absence of Orowan looping events, and to the associated basal slip localization. |
| first_indexed | 2024-03-13T02:36:53Z |
| format | Article |
| id | doaj.art-f5ca4c77723b49c9b5941f15e7fd6048 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-24T08:26:26Z |
| publishDate | 2023-05-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-f5ca4c77723b49c9b5941f15e7fd60482024-04-16T22:18:16ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672023-05-0111516561671A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline Mg alloysX.Z. Jin0W.C. Xu1D.B. Shan2B. Guo3B. Jin4M.T. Pérez-Prado5National Key Laboratory for Precision Hot Processing of Metals & School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China; IMDEA Materials Institute, C/Eric Kandel, 2, Getafe, Madrid 28906, Spain; Corresponding authors at: National Key Laboratory for Precision Hot Processing of Metals & School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China.National Key Laboratory for Precision Hot Processing of Metals & School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China; Corresponding authors at: National Key Laboratory for Precision Hot Processing of Metals & School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China.National Key Laboratory for Precision Hot Processing of Metals & School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR ChinaNational Key Laboratory for Precision Hot Processing of Metals & School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR ChinaAdvanced Composites Simulation Lab, University of Southern California, Los Angeles, CA 90089, U.S.A; M.C. Gill Composites Center, University of Southern California, Los Angeles, CA 90089, U.S.AIMDEA Materials Institute, C/Eric Kandel, 2, Getafe, Madrid 28906, SpainThis work aims to understand the inefficiency of nanoprecipitates to strengthen a weakly textured, polycrystalline Mg-Gd-Y-Zr alloy. An experimental micromechanical approach consisting on micropillar compression combined with analytical electron microscopy is put in place to analyze the effect of nanoprecipitation on soft and hard basal slip and twinning in individual grains with different orientations. This study shows that, in grains that are favorably oriented for basal slip (“soft” basal slip), aging leads to extreme localization due to the ability of basal dislocations to shear the nanoparticles, resulting overall in the softening of basal systems. Additionally, in grains in which the c-axis is almost perpendicular to the compression axis, prismatic slip dominates deformation in the solid solution state and nanoprecipitation favors twinning due to the concomitant lattice solute depletion. Finally, in grains oriented with their c-axis making an angle of about 5–7° with respect to the compression axis, which deform mainly by “hard” basal slip, precipitation leads to the strengthening of basal systems in the absence of obvious localization. This work reveals that the poor hardening response of the polycrystalline alloy is related to the capability of basal dislocations to shear the nanoparticles, in the absence of Orowan looping events, and to the associated basal slip localization.http://www.sciencedirect.com/science/article/pii/S2213956721002632MagnesiumPrecipitationBasal slipParticle shearingSlip localization |
| spellingShingle | X.Z. Jin W.C. Xu D.B. Shan B. Guo B. Jin M.T. Pérez-Prado A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline Mg alloys Journal of Magnesium and Alloys Magnesium Precipitation Basal slip Particle shearing Slip localization |
| title | A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline Mg alloys |
| title_full | A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline Mg alloys |
| title_fullStr | A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline Mg alloys |
| title_full_unstemmed | A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline Mg alloys |
| title_short | A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline Mg alloys |
| title_sort | quantitative microplasticity based approach to rationalize the poor strengthening response of polycrystalline mg alloys |
| topic | Magnesium Precipitation Basal slip Particle shearing Slip localization |
| url | http://www.sciencedirect.com/science/article/pii/S2213956721002632 |
| work_keys_str_mv | AT xzjin aquantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT wcxu aquantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT dbshan aquantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT bguo aquantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT bjin aquantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT mtperezprado aquantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT xzjin quantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT wcxu quantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT dbshan quantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT bguo quantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT bjin quantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys AT mtperezprado quantitativemicroplasticitybasedapproachtorationalizethepoorstrengtheningresponseofpolycrystallinemgalloys |