Simultaneously improving strength, ductility and formability in 2195 Al-Li alloy components via pre-aging treatment
The Al-Cu-Li alloy large thin-walled complex components are crucial for the critical equipment in aerospace and aviation fields due to their high-performance, lightweight and high-efficiency. However, the poor plasticity of Al-Cu-Li alloy sheets limits the forming of large thin-walled complex compon...
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EDP Sciences
2025-01-01
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| Series: | MATEC Web of Conferences |
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| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2025/02/matecconf_iddrg2025_02019.pdf |
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| author | Sun Kuokuo Zhan Mei Fan Xiaoguang |
| author_facet | Sun Kuokuo Zhan Mei Fan Xiaoguang |
| author_sort | Sun Kuokuo |
| collection | DOAJ |
| description | The Al-Cu-Li alloy large thin-walled complex components are crucial for the critical equipment in aerospace and aviation fields due to their high-performance, lightweight and high-efficiency. However, the poor plasticity of Al-Cu-Li alloy sheets limits the forming of large thin-walled complex components. Herein, an effective strategy for simultaneously enhancing strength, ductility and formability of rolled Al-Cu-Li alloy sheets is proposed by short time artificial pre-aging after solution treatment. The result indicates that good ductility is obtained through pre-aging treatment, with elongation increased by 24.2% compared to the solution alloy. Notably, carrying out formability tests, the limiting bulging height (LDH) of preaged alloy (37.905mm) is increased by 20.5% compared to solution alloy (31.468mm), and meanwhile surface roughness is improved from 3.339µm to l.392µm. Achieving higher limit drawing ratio (LDR=2.628) and average plastic ratio (r̄=1.55) enhances the drawability of the Al-Cu-Li alloy sheets. Microstructure analysis reveals that the simultaneous increase in strength, ductility and formability is attributed to the fine and well-dispersed coherent nanoprecipitates, interacting with dislocations, weaking local stress concentration, serving as dislocation sources, promoting dislocation movements. These findings offer valuable insights for developing high-performance Al-Cu-Li alloy complex components. |
| format | Article |
| id | doaj-art-ceaefa9964314920a0969b0e5bdc0881 |
| institution | OA Journals |
| issn | 2261-236X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | EDP Sciences |
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| series | MATEC Web of Conferences |
| spelling | doaj-art-ceaefa9964314920a0969b0e5bdc08812025-08-20T02:26:02ZengEDP SciencesMATEC Web of Conferences2261-236X2025-01-014080201910.1051/matecconf/202540802019matecconf_iddrg2025_02019Simultaneously improving strength, ductility and formability in 2195 Al-Li alloy components via pre-aging treatmentSun Kuokuo0Zhan Mei1Fan Xiaoguang2State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Ploytechnical UniversityState Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Ploytechnical UniversityState Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Ploytechnical UniversityThe Al-Cu-Li alloy large thin-walled complex components are crucial for the critical equipment in aerospace and aviation fields due to their high-performance, lightweight and high-efficiency. However, the poor plasticity of Al-Cu-Li alloy sheets limits the forming of large thin-walled complex components. Herein, an effective strategy for simultaneously enhancing strength, ductility and formability of rolled Al-Cu-Li alloy sheets is proposed by short time artificial pre-aging after solution treatment. The result indicates that good ductility is obtained through pre-aging treatment, with elongation increased by 24.2% compared to the solution alloy. Notably, carrying out formability tests, the limiting bulging height (LDH) of preaged alloy (37.905mm) is increased by 20.5% compared to solution alloy (31.468mm), and meanwhile surface roughness is improved from 3.339µm to l.392µm. Achieving higher limit drawing ratio (LDR=2.628) and average plastic ratio (r̄=1.55) enhances the drawability of the Al-Cu-Li alloy sheets. Microstructure analysis reveals that the simultaneous increase in strength, ductility and formability is attributed to the fine and well-dispersed coherent nanoprecipitates, interacting with dislocations, weaking local stress concentration, serving as dislocation sources, promoting dislocation movements. These findings offer valuable insights for developing high-performance Al-Cu-Li alloy complex components.https://www.matec-conferences.org/articles/matecconf/pdf/2025/02/matecconf_iddrg2025_02019.pdfal-cu-li alloy componentspre-agingformabilitynanoprecipitates |
| spellingShingle | Sun Kuokuo Zhan Mei Fan Xiaoguang Simultaneously improving strength, ductility and formability in 2195 Al-Li alloy components via pre-aging treatment MATEC Web of Conferences al-cu-li alloy components pre-aging formability nanoprecipitates |
| title | Simultaneously improving strength, ductility and formability in 2195 Al-Li alloy components via pre-aging treatment |
| title_full | Simultaneously improving strength, ductility and formability in 2195 Al-Li alloy components via pre-aging treatment |
| title_fullStr | Simultaneously improving strength, ductility and formability in 2195 Al-Li alloy components via pre-aging treatment |
| title_full_unstemmed | Simultaneously improving strength, ductility and formability in 2195 Al-Li alloy components via pre-aging treatment |
| title_short | Simultaneously improving strength, ductility and formability in 2195 Al-Li alloy components via pre-aging treatment |
| title_sort | simultaneously improving strength ductility and formability in 2195 al li alloy components via pre aging treatment |
| topic | al-cu-li alloy components pre-aging formability nanoprecipitates |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2025/02/matecconf_iddrg2025_02019.pdf |
| work_keys_str_mv | AT sunkuokuo simultaneouslyimprovingstrengthductilityandformabilityin2195allialloycomponentsviapreagingtreatment AT zhanmei simultaneouslyimprovingstrengthductilityandformabilityin2195allialloycomponentsviapreagingtreatment AT fanxiaoguang simultaneouslyimprovingstrengthductilityandformabilityin2195allialloycomponentsviapreagingtreatment |