Mechanical Properties of 316L Stainless Steel with Nanostructure Surface Layer Induced by Surface Mechanical Attrition Treatment

2007 ◽  
pp. 1810-1813
Author(s):  
Xiao Hua Yang ◽  
Wei Zhen Dui ◽  
Gang Liu
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Surface Layer ◽  
316L Stainless Steel ◽  
Surface Mechanical Attrition Treatment ◽  
Mechanical Attrition ◽  
Nanostructure Surface

Mechanical Properties of 316L Stainless Steel with Nanostructure Surface Layer Induced by Surface Mechanical Attrition Treatment

2007 ◽  
Vol 353-358 ◽  
pp. 1810-1813 ◽  
Author(s):  
Xiao Hua Yang ◽  
Wei Zhen Dui ◽  
Gang Liu
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Wear Resistance ◽  
Surface Layer ◽  
316L Stainless Steel ◽  
Hardened Layer ◽  
Surface Mechanical Attrition Treatment ◽  
Mechanical Attrition ◽  
Nanostructure Surface ◽  
Nanocrystalline Layer

The mechanical properties of the 316L stainless steel subjected to surface mechanical attrition treatment (SMAT) have been studied, these properties are hardness, tensile properties and wear resistance. The research shows that the thickness of the hardened layer increases with the increasing of the treating time. The refined microstructure in the treated layer led to increasing in hardness, strength, and wear resistance. It is obvious that the surface layer hardness and bulk yield strength are increasing when the SMAT time reaches 5 minutes. The increase of surface layer wear resistance is obvious when the SMAT time is 15 minutes. The SEM observation of the wear scars shows that the nanocrystalline layer might reduce the effect of adhesive wear of 316L stainless steel. Therefore, the wear mechanism changes from adhesive abrasion to grinding particle abrasion after SMAT.

scholarly journals Study of the Mechanical Properties of a Nanostructured Surface Layer on 316L Stainless Steel

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
F. C. Lang ◽  
Y. M. Xing ◽  
J. Zhu ◽  
Y. R. Zhao
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Surface Layer ◽  
Electron Microscope ◽  
316L Stainless Steel ◽  
Nanostructured Surface ◽  
Transmission Electron ◽  
Tensile Process ◽  
The Matrix ◽  
Reverse Analysis

A nanostructured surface layer (NSSL) was generated on a 316L stainless steel plate through surface nanocrystallization (SNC). The grains of the surface layer were refined to nanoscale after SNC treatment. Moreover, the microstructure and mechanical properties of NSSL were analyzed with a transmission electron microscope (TEM) and scanning electron microscope (SEM), through nanoindentation, and through reverse analysis of finite element method (FEM). TEM results showed that the grains in the NSSL measured 8 nm. In addition, these nanocrystalline grains took the form of random crystallographic orientation and were roughly equiaxed in shape. In situ SEM observations of the tensile process confirmed that the motions of the dislocations were determined from within the material and that the motions were blocked by the NSSL, thus improving overall yielding stress. Meanwhile, the nanohardness and the elastic modulus of the NSSL, as well as those of the matrix, were obtained with nanoindentation technology. The reverse analysis of FEM was conducted with MARC software, and the process of nanoindentation on the NSSL and the matrix was simulated. The plastic mechanical properties of NSSL can be derived from the simulation by comparing the results of the simulation and of actual nanoindentation.

Influence of Surface Mechanical Attrition Treatment on the oxidation behaviour of 316L stainless steel

2018 ◽  
Vol 136 ◽  
pp. 188-200 ◽  
Author(s):  
S. Benafia ◽  
D. Retraint ◽  
S. Yapi Brou ◽  
B. Panicaud ◽  
J.L. Grosseau Poussard
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Oxidation Behaviour ◽  
Surface Mechanical Attrition Treatment ◽  
Mechanical Attrition

scholarly journals Low cycle fatigue of 316L stainless steel processed by surface mechanical attrition treatment (SMAT)

2018 ◽  
Vol 165 ◽  
pp. 15002
Author(s):  
Zhidan Sun ◽  
Jianqiang Zhou ◽  
Delphine Retraint ◽  
Thierry Baudin ◽  
Anne-Laure Helbert ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Cyclic Loading ◽  
316L Stainless Steel ◽  
Electron Backscatter Diffraction ◽  
Low Cycle Fatigue ◽  
Surface Mechanical Attrition Treatment ◽  
Cycle Fatigue ◽  
Microstructure Change ◽  
Cyclic Behaviour ◽  
Mechanical Attrition

In this work, the effect of surface mechanical attrition treatment (SMAT) on the cyclic behaviour of a 316L stainless steel under low cycle fatigue (LCF) is investigated. The LCF results are presented in the form of cyclic stress amplitude evolution for both untreated and SMATed samples. In order to better understand the microstructure change due to cyclic loading, electron backscatter diffraction (EBSD) is used to characterize the microstructure of the SMATed samples before and after fatigue tests. A microstructure gradient is highlighted for samples after SMAT from the top surface layer in nanocrystalline grains to the interior region non-affected by impacts. Under LCF loading, new slip systems are activated in the work hardened region, whereas no plastic slip is activated in the nanostructured layer. The residual stresses generated by SMAT are measured using X-ray diffraction (XRD), and their relaxations under cyclic loading are studied by taking into account the microstructure change. The cyclic behaviour of the samples in different material states is interpreted based on these investigations.

Preperation of Ceramic Coatings on Ti Alloy by Surface Nanocrystallization/Micro-Arc Oxidation

2010 ◽  
Vol 146-147 ◽  
pp. 1821-1824
Author(s):  
Jin Xue Zhang ◽  
Guo Dong Hao
Keyword(s):  
Mechanical Properties ◽  
Surface Layer ◽  
Surface Morphology ◽  
Composite Ceramic ◽  
Ceramic Coatings ◽  
Surface Mechanical Attrition Treatment ◽  
Surface Nanocrystallization ◽  
Mechanical Attrition ◽  
Short Period ◽  
Micro Arc Oxidation

Nanostructured surface layer was produced on Ti-6Al-4V alloy by surface mechanical attrition treatment(SMAT) technique, and the composite ceramic coatings of surface nanocrystallization/micro-arc oxidation(SNC/MAO) were prepared on the nanocrystallized surface of Ti-6Al-4V alloy by pulsed single-polar micro-arc oxidation in NaAlO2 solution. XRD, SEM and TEM techniques were used to investigate the phase and surface morphology of ceramic coatings and the influences on the surface state of the alloys. Meantime, the mechanical properties of Ti alloys were measured by tensile test. The results show that after the SMAT treatment for a short period of time, the surface layer was refined into ultrafine grains. The influences of the SMAT technique on the surface morphology of the ceramic coatings were also studied. The ceramic coatings are mainly composed of Al2TiO5, more compact and less porous than those untreated. The mechanical properties of Ti-6Al-4V alloy by SMAT technique are improved, compared with those untreated by SMAT technique.

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