A technique to achieve an excellent strength-ductility balance in AA2024 alloy

• Autorzy: Roodgari Mohammad Reza , Jamaati Roohollah

Identyfikatory

DOI

10.1007/s43452-022-00553-y

• Języki publikacji: EN

Abstrakty

EN

In the current study, the microstructure and mechanical properties of AA2024 alloy produced by a new technique consisting of solution treatment, instantly followed by asymmetric cold rolling with a reduction of 65%, and subsequent artificial aging (heat treatment) with four temperatures of 190, 300, 400, and 500 °C was investigated. The additional shear strain in asymmetric rolling led to the formation of a high amount of shear bands in the microstructure of AA2024 alloy. During aging treatment at the temperature of 300 °C, recrystallization was locally started in the shear bands. The grain morphology of the rolled sample was not much changed after aging at the temperature of 190 and 300 °C. However, the samples aged at 400 and heat-treated at 500 °C had different microstructures. In addition, with increasing the temperature to 500 °C, numerous dispersoids were formed in the microstructure of the AA2024 alloy. The sample after aging treatment at 190 °C had the maximum hardness, yield strength, and ultimate tensile strength of 207.4 HV, 481.7 MPa, and 605.1 MPa, respectively, along with a desirable elongation (7.9%). By increasing the aging temperature, the hardness and strength of the alloy considerably decreased. The aging treatment at 400 and heat treatment at 500 °C led to the complete elimination of the strain hardening effect and recurrence of Portevin-Le Chatelier (PLC) in the stress-strain curves. The fracture mode was often a ductile mode for all samples. By increasing the aging temperature, the number and size of dimples increased. As a consequence, the processing technique used in the present study resulted in an excellent strength-ductility balance due to an appropriate combination of strain hardening and precipitation hardening.

Słowa kluczowe

EN

AA2024 alloy; asymmetric cold rolling; aging treatment; mechanical properties

PL

stop AA2024; walcowanie na zimno; właściwości mechaniczne

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 1
• Strony: art. no. e12, 2023
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

Twórcy

autor

Roodgari Mohammad Reza

• Department of Materials Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol 47148-71167, Iran

autor

Jamaati Roohollah

• Department of Materials Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol 47148-71167, Iran

• https://orcid.org/0000-0002-4764-9910

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)