Microstructure evolution and mechanical properties of austenite stainless steel with gradient twinned structure by surface mechanical attrition treatment

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  • Aiying Chen
  • Chen Wang
  • Jungan Jiang
  • Haihui Ruan
  • Jian Lu

Related Research Unit(s)


Original languageEnglish
Article number1624
Journal / PublicationNanomaterials
Issue number6
Online published21 Jun 2021
Publication statusPublished - Jun 2021



Gradient structures in engineering materials produce an impressive synergy of strength and plasticity, thereafter, have recently attracted extensive attention in the material families. Gradient structured stainless steels (SS) were prepared by surface mechanical attrition treatment (SMAT) with different impacting velocities. The microstructures of the treated samples are characterized by gradient twin fraction and phase constituents. Quantitative relations of gradient microstructure with impacting time and mechanical properties are analyzed according to the observations of SEM, TEM, XRD, and tests of mechanical property. The processed SSs exhibited to be simultaneously stiff, strong, and ductile, which can be attributed to the co-operation of the different spatial distributions of multi-scaled structures. The formation of gradient twinned structure is resolved and the strengthening by gradient structure is explored.

Research Area(s)

  • Austenitic stainless steel, Mechanical property, Multi-scaled twin, Strengthening, Surface mechanical attrition treatment

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