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Article Dans Une Revue Materials Science and Engineering: A Année : 2017

One-step consolidation and precipitation hardening of an ultra-fine grained Al-Zn-Mg alloy by Spark Plasma Sintering

Résumé

In the present work, ultrafine-grained Al-Zn-Mg alloy produced by high energy ball milling and Spark Plasma Sintering was synthesized. The Hall-Petch strengthening due to grain refinement (about 150 nm) is preserved and the Orowan's effect attributed to the presence of the hardening phase η’ is obtained in a single-step during the sintering. Maximum compression stresses as high as 736 MPa and 830 MPa were reached in quasistatic and dynamic conditions respectively. Hardness was increased from 124 HV5 for a consolidated coarse grained material to 196 HV for a consolidated ultrafine-grained (UFG) material. The mechanical properties obtained in this study were all superior to the ones of the reference AA7020-T651.
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Dates et versions

hal-01580876 , version 1 (03-09-2017)

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Hippolyte Queudet, S. Lemonnier, E. Barraud, Julien Guyon, Jaafar Ghanbaja, et al.. One-step consolidation and precipitation hardening of an ultra-fine grained Al-Zn-Mg alloy by Spark Plasma Sintering. Materials Science and Engineering: A, 2017, 685, pp.227-234. ⟨10.1016/j.msea.2017.01.009⟩. ⟨hal-01580876⟩
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