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Founded in 1987， Bimonthly
Supervisor：Jiangxi University Of Science And Technology
Sponsored by：Jiangxi University Of Science And Technology
Jiangxi Nonferrous Metals Society
ISSN：1674-9669
CN：36-1311/TF
CODEN YJKYA9
Volume 12 Issue 6
Dec.  2021
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CHEN Weiqing, XU Guanming, CUI Ziyi, YU Jiatian, ZHANG Xuehui, WANG Chunming. Microstructure and mechanical properties of 7B85 alloy ultrasonic rolling treated 7B85 alloy[J]. Nonferrous Metals Science and Engineering, 2021, 12(6): 80-87. DOI: 10.13264/j.cnki.ysjskx.2021.06.011
Citation: CHEN Weiqing, XU Guanming, CUI Ziyi, YU Jiatian, ZHANG Xuehui, WANG Chunming. Microstructure and mechanical properties of 7B85 alloy ultrasonic rolling treated 7B85 alloy[J]. Nonferrous Metals Science and Engineering, 2021, 12(6): 80-87. DOI: 10.13264/j.cnki.ysjskx.2021.06.011
shu

Microstructure and mechanical properties of 7B85 alloy ultrasonic rolling treated 7B85 alloy

  • a.

    Faculty of Materials Metallurgy and Chemistry, Ganzhou 341000, Jiangxi, China

  • b.

    Institute of Bioadditive Manufacturing, Jiangxi University of Science and Technology, Nanchang 330013, China

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  • Received Date: May 23, 2021
  • Published Date: December 30, 2021
    Graphical Abstract
    • Abstract
  • The 7B85 alloy was treated by ultrasonic rolling treatment (USRT) with different preloading depth (0, 0.1, 0.2, 0.3 and 0.4 mm). The microstructure and mechanical properties of 7B85 alloy treated by ultrasonic rolling were investigated by optical microscope, surface roughness tester, micro Vickers hardness test, tensile test, scanning electron microscope, X-ray diffraction and electron back scattering diffraction. The results show that the surface roughness, microhardness and tensile strength of 7B85 alloy treated by ultrasonic surface rolling reached the optimal value, when the preloading depth was 0.2 mm. The fracture morphology of the 7B85 alloy showed a large number of deep dimples, which were mainly in the form of ductile fracture. Meanwhile, most of the η precipitates in the 7B85 alloy are dissolved into the aluminum matrix after USRT, and the average grain size of the alloy surface is about (25.22 ± 6.46) nm. The improvement of the mechanical properties of the 7B85 alloy after USRT is mainly attributed to the joint action of fine grain strengthening and stress strengthening on the alloy surface.
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    • References (38)
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