Hybrid friction stir processing with active cooling approach to enhance superplastic behavior of AA7075 aluminum alloy

• Autorzy: Patel Vivek , Badheka Vishvesh , Li Wenya , Akkireddy Satyaprasad

Identyfikatory

DOI

10.1016/j.acme.2019.08.007

• Języki publikacji: EN

Abstrakty

EN

Friction stir processing (FSP) with active cooling approach can be considered as one of the variants of the FSP in order to enhance superplastic behavior. In this study, high strength AA7075 alloy was subjected to normal and hybrid FSP at different cooling medium such as compressed air, water, and CO2 to obtain a variety of cooling rate during the process. Hybrid FSP samples were produced without any processing flaws at a lower processing temperature in comparison to normal FSP sample. Among the hybrid FSP samples, CO2 cooling sample was produced at the lowest processing temperature. Optical and electron microscopy confirmed that microstructures of all the samples were characterized by fine equiaxed grain in the stir zone (SZ). Reduction of grain size in hybrid FSP samples was found due to higher cooling rate, which prevented the coarsening of grains in the SZ. Improvement in grain refinement was observed in the order of normal (4.12 μm), compressed air (3 μm), water (2.64 μm), CO2 (1.96 μm) FSP samples. All FSP samples obtained the superplastic elongation. The highest elongation of 572% was achieved for CO2 cooling sample due to the finest grained microstructure produced at the lowest heat input during FSP.

Słowa kluczowe

EN

7075 alloy; aluminum; cooling; friction stir processing; superplasticity

PL

aluminium; chłodzenie; superplastyczność

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2019
• Tom: Vol. 19, no. 4
• Strony: 1368--1380
• Opis fizyczny: Bibliogr. 37 poz., rys., wykr.

Twórcy

autor

Patel Vivek

• State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
• Mechanical Engineering Department, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar 382007, Gujarat, India

autor

Badheka Vishvesh

• Mechanical Engineering Department, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar 382007, Gujarat, India

autor

Li Wenya

• State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China

autor

Akkireddy Satyaprasad

• Institute for Plasma Research, Gandhinagar, Gujarat, India

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020)