Enhanced mechanical properties and corrosion resistance of 316L stainless steel by pre-forming a gradient nanostructured surface layer and annealing
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 116773 |
Journal / Publication | Acta Materialia |
Volume | 208 |
Online published | 24 Feb 2021 |
Publication status | Published - 15 Apr 2021 |
Link(s)
Abstract
Stainless steels with high mechanical properties and corrosion resistance are promising structural materials for the next generation of aerospace and some niche industries. In this work, we pre-formed a gradient nanostructured (GNS) surface layer on 316L stainless steel by surface mechanical rolling treatment (SMRT) and subsequently annealed it at 700 °C. Tensile tests showed that the strength-ductility synergy was enhanced in the annealed-SMRT sample, while the grain size and hardness in the GNS layer retained rather stable. In addition, a remarkable Cr-enrichment was found in the GNS surface layer after annealing, resulting in a significantly enhanced corrosion resistance. The underlying mechanisms on the microstructure, composition and phases evolutions, as well as their effects on deformation and corrosion behavior, were analyzed in the annealed-SMRT sample. This work provides insights on developing a simple thermomechanical approach to produce stainless steels with enhanced mechanical properties and corrosion resistance.
Research Area(s)
- 316L stainless steel, Corrosion resistance, Gradient nanostructured, Mechanical property, Surface mechanical rolling treatment
Citation Format(s)
Enhanced mechanical properties and corrosion resistance of 316L stainless steel by pre-forming a gradient nanostructured surface layer and annealing. / Lei, Y.B.; Wang, Z.B.; Zhang, B. et al.
In: Acta Materialia, Vol. 208, 116773, 15.04.2021.
In: Acta Materialia, Vol. 208, 116773, 15.04.2021.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review