Effect of laser shot peening without coating on the surface properties and corrosion behavior of 316L steel

Abstract The paper presents recent developments concerning the formation of surface layer in austempered ductile iron castings. It was found that the traditional methods used to change the properties of the surface layer, i.e. the effect of protective atmosphere during austenitising or shot peening, are not fully satisfactory to meet the demands of commercial applications. Therefore, new ways to shape the surface layer and the surface properties of austempered ductile iron castings are searched for, to mention only detonation spraying, carbonitriding, CVD methods, etc.

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Effect of electropulsing-ultrasonic surface treatment on the surface properties and the corrosion behavior of 45 steel

Journal of Materials Research ◽

10.1557/jmr.2016.126 ◽

2016 ◽

Vol 31 (14) ◽

pp. 2114-2124 ◽

Cited By ~ 2

Author(s):

Bing Zhang ◽

Haibo Wang ◽

Shuo Zhang ◽

Guolin Song ◽

Song-Zhu Kure-Chu ◽

...

Keyword(s):

Surface Treatment ◽

Surface Properties ◽

Corrosion Behavior ◽

Image Position ◽

Ultrasonic Surface Treatment

Abstract

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Effect of Post-spray Shot Peening Treatment on the Corrosion Behavior of NiCr-Mo Coating by Plasma Spraying of the Shell–Core–Structured Powders

Journal of Thermal Spray Technology ◽

10.1007/s11666-017-0659-x ◽

2017 ◽

Vol 27 (1-2) ◽

pp. 232-242 ◽

Cited By ~ 7

Author(s):

Jia-Jia Tian ◽

Ying-Kang Wei ◽

Cheng-Xin Li ◽

Guan-Jun Yang ◽

Chang-Jiu Li

Keyword(s):

Plasma Spraying ◽

Corrosion Behavior ◽

Shot Peening

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An Study of Nanoscale Mechanical Twins in GH4169 Alloy by Laser Shot Peening Processing

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1027.155 ◽

2021 ◽

Vol 1027 ◽

pp. 155-162

Author(s):

Qiang Wang

Keyword(s):

Shot Peening ◽

Electron Backscatter Diffraction ◽

Laser Shot ◽

Near Surface ◽

Refined Grains ◽

Transmission Electron ◽

Coarse Grains ◽

Mechanical Twins ◽

Backscatter Diffraction ◽

Gh4169 Alloy

In order to study the mechanism of the fatigue strengthening using laser shot peening in GH4169 alloy, micro-structural and nanoscale mechanical twins (MT) at different depth below the top surface subjected to laser shot peening processing (LSP) were investigated by means of electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) observations. In terms of the experimental observations and analyses, the formation of refined grains and nanoscale MT mechanism at the near surface of GH4169 alloy as a function of LSP treament can be summarized as follows: (i) two direction low density of MTs divide the initial coarse grains into submicron rhombic blocks; (ii) high density of MTs aligned in two directions subdivide the submicron rhombic blocks into nanoscale rhombic MT blocks; (iii) the third direction MT further refine the nanoscale rhombic MT blocks into nanoscale triangular MT blocks; (iv) some of subdivided blocks evolve into refined grains. An ultra-high strain rate induced by ultra-short laser pulse plays a key role in the formation of refined grains and nanoscale MT during plastic deformation of GH4169 alloy subjected to LSP treatment.

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