Improving strength-ductility synergy in a TRIP metastable β-Zr alloy containing heterogeneous α precipitates
In this study, a simple two-step heat treatment is proposed to design a TRIP metastable β-Zr alloy with good strength-ductility synergy by introducing heterogeneous α precipitates. The heterogeneous α precipitates mainly consist of necklace-like α at β grain boundaries and a small amount of randomly...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-05-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423009055 |
| _version_ | 1797798712330682368 |
|---|---|
| author | Zhongni Liao Wei Fu Tao Liu Qi Sun TaoTao Wang Lizhai Zhang Ran Jing Tao Tao Ai Jinyu Zhang |
| author_facet | Zhongni Liao Wei Fu Tao Liu Qi Sun TaoTao Wang Lizhai Zhang Ran Jing Tao Tao Ai Jinyu Zhang |
| author_sort | Zhongni Liao |
| collection | DOAJ |
| description | In this study, a simple two-step heat treatment is proposed to design a TRIP metastable β-Zr alloy with good strength-ductility synergy by introducing heterogeneous α precipitates. The heterogeneous α precipitates mainly consist of necklace-like α at β grain boundaries and a small amount of randomly distributed intragranular α. Compared with the sample consisting of single β phase with yield strength of 683 MPa and ductility of 14.6%, yield strength of the designed two samples with heterogeneous α precipitates increases to 781 MPa and 842 MPa respectively, while the ductility increases to 15.3% and decreases to 13.6% respectively. The microstructure analysis shows that the dominant deformation mechanisms of the sample containing single β phase are β to α′ martensitic transformation and domaination of α′ martensite, accompanied by kinking band, and {101¯1}α′ twinning. For samples with heterogeneous α precipitates, the precipitation of α will increase the triggering stress of the kinking band, resulting in an increase in the yield strength at early stage of deformation. More importantly, the unique heterogeneous α structure brings a gently cutting effect of the necklace-like α on β grains and a traversability of the intragranular α to the growing α′ martensite, making the β to α′ martensitic transformation and domaination of α′ martensite slightly inhibited, together with the absorption and transfer of plastic deformation energy by α precipitates endow the alloy with high ductility. The present work can provide inspiration for improving the strength-ductility synergy of metastable β-Zr or β-Ti alloy through heterogeneous precipitate structure design. |
| first_indexed | 2024-03-13T04:09:00Z |
| format | Article |
| id | doaj.art-077c450aa65b40b498c4f39cd5e3dbe7 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-13T04:09:00Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-077c450aa65b40b498c4f39cd5e3dbe72023-06-21T06:57:09ZengElsevierJournal of Materials Research and Technology2238-78542023-05-012459565970Improving strength-ductility synergy in a TRIP metastable β-Zr alloy containing heterogeneous α precipitatesZhongni Liao0Wei Fu1Tao Liu2Qi Sun3TaoTao Wang4Lizhai Zhang5Ran Jing6Tao Tao Ai7Jinyu Zhang8School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, China; Corresponding author.State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Corresponding author.Southwest Aluminum (group) Co., Ltd., Chongqing, 401326, ChinaKey Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Material Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, ChinaSchool of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, ChinaSchool of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, ChinaSchool of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, ChinaSchool of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, ChinaIn this study, a simple two-step heat treatment is proposed to design a TRIP metastable β-Zr alloy with good strength-ductility synergy by introducing heterogeneous α precipitates. The heterogeneous α precipitates mainly consist of necklace-like α at β grain boundaries and a small amount of randomly distributed intragranular α. Compared with the sample consisting of single β phase with yield strength of 683 MPa and ductility of 14.6%, yield strength of the designed two samples with heterogeneous α precipitates increases to 781 MPa and 842 MPa respectively, while the ductility increases to 15.3% and decreases to 13.6% respectively. The microstructure analysis shows that the dominant deformation mechanisms of the sample containing single β phase are β to α′ martensitic transformation and domaination of α′ martensite, accompanied by kinking band, and {101¯1}α′ twinning. For samples with heterogeneous α precipitates, the precipitation of α will increase the triggering stress of the kinking band, resulting in an increase in the yield strength at early stage of deformation. More importantly, the unique heterogeneous α structure brings a gently cutting effect of the necklace-like α on β grains and a traversability of the intragranular α to the growing α′ martensite, making the β to α′ martensitic transformation and domaination of α′ martensite slightly inhibited, together with the absorption and transfer of plastic deformation energy by α precipitates endow the alloy with high ductility. The present work can provide inspiration for improving the strength-ductility synergy of metastable β-Zr or β-Ti alloy through heterogeneous precipitate structure design.http://www.sciencedirect.com/science/article/pii/S2238785423009055Metastable β-Zr alloyMechanical propertiesHeterogeneous α structureDeformation mechanisms |
| spellingShingle | Zhongni Liao Wei Fu Tao Liu Qi Sun TaoTao Wang Lizhai Zhang Ran Jing Tao Tao Ai Jinyu Zhang Improving strength-ductility synergy in a TRIP metastable β-Zr alloy containing heterogeneous α precipitates Journal of Materials Research and Technology Metastable β-Zr alloy Mechanical properties Heterogeneous α structure Deformation mechanisms |
| title | Improving strength-ductility synergy in a TRIP metastable β-Zr alloy containing heterogeneous α precipitates |
| title_full | Improving strength-ductility synergy in a TRIP metastable β-Zr alloy containing heterogeneous α precipitates |
| title_fullStr | Improving strength-ductility synergy in a TRIP metastable β-Zr alloy containing heterogeneous α precipitates |
| title_full_unstemmed | Improving strength-ductility synergy in a TRIP metastable β-Zr alloy containing heterogeneous α precipitates |
| title_short | Improving strength-ductility synergy in a TRIP metastable β-Zr alloy containing heterogeneous α precipitates |
| title_sort | improving strength ductility synergy in a trip metastable β zr alloy containing heterogeneous α precipitates |
| topic | Metastable β-Zr alloy Mechanical properties Heterogeneous α structure Deformation mechanisms |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423009055 |
| work_keys_str_mv | AT zhongniliao improvingstrengthductilitysynergyinatripmetastablebzralloycontainingheterogeneousaprecipitates AT weifu improvingstrengthductilitysynergyinatripmetastablebzralloycontainingheterogeneousaprecipitates AT taoliu improvingstrengthductilitysynergyinatripmetastablebzralloycontainingheterogeneousaprecipitates AT qisun improvingstrengthductilitysynergyinatripmetastablebzralloycontainingheterogeneousaprecipitates AT taotaowang improvingstrengthductilitysynergyinatripmetastablebzralloycontainingheterogeneousaprecipitates AT lizhaizhang improvingstrengthductilitysynergyinatripmetastablebzralloycontainingheterogeneousaprecipitates AT ranjing improvingstrengthductilitysynergyinatripmetastablebzralloycontainingheterogeneousaprecipitates AT taotaoai improvingstrengthductilitysynergyinatripmetastablebzralloycontainingheterogeneousaprecipitates AT jinyuzhang improvingstrengthductilitysynergyinatripmetastablebzralloycontainingheterogeneousaprecipitates |