Superb impact resistance of nano-precipitation-strengthened high-entropy alloys
Critical engineering applications, such as landing gears and armor protection, require structural materials withstanding high strength and significant plastic deformation. Nanoprecipitate-strengthened high-entropy alloys (HEAs) are considered as promising candidates for structural applications due t...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2025-04-01
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| Series: | Advanced Powder Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772834X25000132 |
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| author | Ao Fu Bin Liu Zezhou Li Tao Yang YuanKui Cao Junyang He Bingfeng Wang Jia Li Qihong Fang Xingwang Cheng Marc A. Meyers Yong Liu |
| author_facet | Ao Fu Bin Liu Zezhou Li Tao Yang YuanKui Cao Junyang He Bingfeng Wang Jia Li Qihong Fang Xingwang Cheng Marc A. Meyers Yong Liu |
| author_sort | Ao Fu |
| collection | DOAJ |
| description | Critical engineering applications, such as landing gears and armor protection, require structural materials withstanding high strength and significant plastic deformation. Nanoprecipitate-strengthened high-entropy alloys (HEAs) are considered as promising candidates for structural applications due to their enhanced strength and exceptional work-hardening capability. Herein, we report a FeCoNiAlTi-type HEA that achieves ultrahigh gigapascal yield strength from quasi-static to dynamic loading conditions and superb resistance to adiabatic shear failure. This is accomplished by introducing high-density coherent L12 nanoprecipitates. Multiscale characterization and molecular dynamics simulation demonstrate that the L12 nanoprecipitates exhibit multiple functions during impact, not only as the dislocation barrier and the dislocation transmission medium, but also as energy-absorbing islands that disperse the stress spikes through order-to-disorder transition, which result in extraordinary impact resistance. These findings shed light on the development of novel impact-resistant metallic materials. |
| format | Article |
| id | doaj-art-a2abb3f146b04f36b559a3c1ce854013 |
| institution | DOAJ |
| issn | 2772-834X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Advanced Powder Materials |
| spelling | doaj-art-a2abb3f146b04f36b559a3c1ce8540132025-08-20T02:57:12ZengKeAi Communications Co. Ltd.Advanced Powder Materials2772-834X2025-04-014210027710.1016/j.apmate.2025.100277Superb impact resistance of nano-precipitation-strengthened high-entropy alloysAo Fu0Bin Liu1Zezhou Li2Tao Yang3YuanKui Cao4Junyang He5Bingfeng Wang6Jia Li7Qihong Fang8Xingwang Cheng9Marc A. Meyers10Yong Liu11State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; Corresponding author.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaDepartment of Mechanical Engineering, City University of Hong Kong, 999077, the Hong Kong Special Administrative Region of ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Lab of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, ChinaState Key Lab of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaDepartment of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA 92093, USAState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaCritical engineering applications, such as landing gears and armor protection, require structural materials withstanding high strength and significant plastic deformation. Nanoprecipitate-strengthened high-entropy alloys (HEAs) are considered as promising candidates for structural applications due to their enhanced strength and exceptional work-hardening capability. Herein, we report a FeCoNiAlTi-type HEA that achieves ultrahigh gigapascal yield strength from quasi-static to dynamic loading conditions and superb resistance to adiabatic shear failure. This is accomplished by introducing high-density coherent L12 nanoprecipitates. Multiscale characterization and molecular dynamics simulation demonstrate that the L12 nanoprecipitates exhibit multiple functions during impact, not only as the dislocation barrier and the dislocation transmission medium, but also as energy-absorbing islands that disperse the stress spikes through order-to-disorder transition, which result in extraordinary impact resistance. These findings shed light on the development of novel impact-resistant metallic materials.http://www.sciencedirect.com/science/article/pii/S2772834X25000132High-entropy alloyDynamic responseAdiabatic shear bandDeformation mechanismMolecular dynamics simulation |
| spellingShingle | Ao Fu Bin Liu Zezhou Li Tao Yang YuanKui Cao Junyang He Bingfeng Wang Jia Li Qihong Fang Xingwang Cheng Marc A. Meyers Yong Liu Superb impact resistance of nano-precipitation-strengthened high-entropy alloys Advanced Powder Materials High-entropy alloy Dynamic response Adiabatic shear band Deformation mechanism Molecular dynamics simulation |
| title | Superb impact resistance of nano-precipitation-strengthened high-entropy alloys |
| title_full | Superb impact resistance of nano-precipitation-strengthened high-entropy alloys |
| title_fullStr | Superb impact resistance of nano-precipitation-strengthened high-entropy alloys |
| title_full_unstemmed | Superb impact resistance of nano-precipitation-strengthened high-entropy alloys |
| title_short | Superb impact resistance of nano-precipitation-strengthened high-entropy alloys |
| title_sort | superb impact resistance of nano precipitation strengthened high entropy alloys |
| topic | High-entropy alloy Dynamic response Adiabatic shear band Deformation mechanism Molecular dynamics simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2772834X25000132 |
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