Influence of hydrogen on surface integrity and phase transformation of laser peened 316L stainless steel

Orbital - TIG (OT) auto welding process was applied for the weld connection of the fixed pipe lines. The heat distribution of the OT welding has influenced phase transformation and quality of the weld. In this paper, the temperature fields and phase transformation of 316L stainless steel pipes have been simulated during OT auto welding process. The numerical simulation has been used and supported by the JMATPRO 7.0 and SYSWELD softwares.

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Improved Surface Integrity during End Milling AISI 316L Stainless Steel Using Heat Assisted Machining

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.752-753.62 ◽

2015 ◽

Vol 752-753 ◽

pp. 62-67 ◽

Cited By ~ 1

Author(s):

Adam Umar Alkali ◽

Turnad Lenggo Ginta ◽

Ahmad Majdi Abdul-Rani ◽

Hasan Fawad

Keyword(s):

Stainless Steel ◽

Heat Source ◽

Surface Integrity ◽

316L Stainless Steel ◽

End Milling ◽

Cutting Speed ◽

Maximum Temperature ◽

Work Piece ◽

Process Conditions ◽

Hard Part

Different heat source had been investigated for thermally enhanced machining on various engineering materials. Even so, temperature control from the heat source remained a challenged to the process effectiveness.This study used oxyacetylene combustion flame as a heat source in heat assisted machining. The study focuses on the relationships between process conditions; maximum temperature distribution and the surface integrity of 316L stainless steel during preheat machining as compared to dry hard part machining. Two levels of cutting speed 1000rev/min, 630rev/min and feed rates 160mm/min and 100mm/min were investigated while the depth of cutting was maintained constant at 1mm. While preheat machining for 60seconds along the span of the work piece material at cutting speed 1000 rev/min and feedrate 100mm/rev, the average surface finish have improved by 94% over dry hard part machining. This corresponds to flank wear VB = 0.0644mm during heat assisted machining and 0.1425mm for dry hard part machining respectively. Such improvement was accompanied with longer tool life and secured surface integrity which improves the material’s life cycle.

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Hydrogen Induced Crack and Phase Transformation in Hydrogen Pressured Tensile Test of 316L Stainless Steel

Korean Journal of Metals and Materials ◽

10.3365/kjmm.2015.53.2.82 ◽

2015 ◽

Vol 48 (6) ◽

pp. 82-89

Author(s):

Byung Hak Choe ◽

Un Bong Baek ◽

Jong Hun Shim ◽

Young Uk Kim ◽

Young Suk Kim ◽

...

Keyword(s):

Stainless Steel ◽

Phase Transformation ◽

Tensile Test ◽

316L Stainless Steel

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Investigation of defects and nanoparticles with martensitic phase transformation in surface nanostructured 316L stainless steel by slow-positron beam

Journal of Materials Research ◽

10.1557/jmr.2010.0074 ◽

2010 ◽

Vol 25 (3) ◽

pp. 587-591 ◽

Cited By ~ 1

Author(s):

Xiaowei Wang ◽

Liangyue Xiong ◽

Xiaoguang Liu ◽

Gang Liu ◽

Chunlan Zhou ◽

...

Keyword(s):

Stainless Steel ◽

Phase Transformation ◽

316L Stainless Steel ◽

Positron Beam ◽

Martensite Phase ◽

Surface Mechanical Attrition Treatment ◽

Annihilation Radiation ◽

Slow Positron ◽

Mechanical Attrition ◽

Line Shape Parameter

In this article, we investigated the defects introduced by surface mechanical attrition treatment by Doppler-broadening spectroscopy of positron annihilation radiation in surface-nanostructured 316L stainless steel. Through the measurement of different thinning layers in the samples treated for 15 min, the slope of line shape parameter S versus wing parameter W curves showed three different values with depth responding to the change of defect configuration. An unusual change of S and W parameters near the surface was mainly from the effect of quantum-dot-like state caused by the formation of nanoparticles. Based on the change of S ˜ W with depth, the martensite phase transformation induced by strain could be estimated to occur within a depth of 35 μm.

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Experimental Investigation to Improve Surface Integrity of Biomedical Devices by End-Milling AISI 316L Stainless Steel

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.789-790.141 ◽

2015 ◽

Vol 789-790 ◽

pp. 141-145 ◽

Cited By ~ 3

Author(s):

Muhammad Yasir ◽

Turnad Lenggo Ginta ◽

Adam Umar Alkali ◽

Mohammad Danish

Keyword(s):

Surface Roughness ◽

Stainless Steel ◽

Surface Integrity ◽

Feed Rate ◽

316L Stainless Steel ◽

End Milling ◽

Cutting Speed ◽

Machining Parameters ◽

Aisi 316L ◽

Aisi 316L Stainless Steel

This paper presents the influence of machining parameters namely cutting speed and feed rate on the machinability enhancement of AISI 316L stainless steel, in terms of surface integrity using end-milling with coated tungsten carbide tool (TiAlN). Optical microscopy, Scanning Electron Microscopy (SEM) and surface roughness measurement were used to analyze the surface integrity in terms surface topography and hardness test. A multi view approach is adopted to study the effect of different cutting parameters on the surface integrity of AISI 316L stainless steel. It was found that high cutting speed and low feed rate influence the surface roughness. Low surface roughness makes AISI 316L stainless steel more corrosion resistant which prevents wear of the implants.

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