Effects of High-Temperature Deep Rolling on Fatigue, Work Hardening, and Residual Stress Relaxation of Martensitic Stainless Steel AISI 420

Because of the general problem of the welding workpiece such as fatigue fracture caused by tensile residual stress lead to initial and propagation crack in the fusion zone. Thus, the mechanical surface treatment of deep rolling on Gas Tungsten Arc Welded (GTAW) surfaces of AISI 316L was studied. Deep rolling (DR) is a cold working process to induce compressive residual stress in the surface layer of the workpiece resulting in hardening deformation which increased surface hardness, and smooth surface that inhibit crack growth and improve fracture strength of materials. The present study focuses on compressive residual stress at the surface of stainless steel AISI 316L butt welded joint of GTAW. The three parameters of DR process were used; pressure 150 bar, rolling speed 400 mm/min, and step over 1.0 mm. The residual stresses analysis by X-ray diffraction with sin2Ψ method at 0, 5, 10, and 20 mm from the center of the welded bead. The results showed that the DR process on the welded of GTAW induce the minimum compressive residual stress-408.6 MPa and maximum-498.1 MPa in longitudinal direction. The results of transverse residual stress in minimum and maximum are 43.7 MPa and-34.8 MPa respectively. The FWHM of DR both longitudinal and transverse direction were increased in the same trend. Furthermore, the microhardness after DR treatment on workpiece surface layer higher than GTAW average 0.4 times.

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Optimized fatigue performance of martensitic stainless steel AISI 440C using deep rolling integrated into hardening process

Journal of Mining and Metallurgy Section B Metallurgy ◽

10.2298/jmmb160720024d ◽

2018 ◽

Vol 54 (1) ◽

pp. 67-71 ◽

Cited By ~ 3

Author(s):

P. Donhongprai ◽

P. Juijerm

Keyword(s):

Stainless Steel ◽

Martensitic Stainless Steel ◽

Rolling Process ◽

Deep Rolling ◽

Strain Ageing ◽

Hardening Process ◽

Steel Aisi ◽

Double Tempering ◽

Stainless Steel Aisi ◽

Tempering Process

The deep rolling process can be modified by annealing at appropriate temperature and time to optimize the fatigue performance of metallic materials. The hardening process of the martensitic stainless steel AISI 440C composes of quenching and double tempering processes. We suggest to integrate the deep rolling process into the hardening treatment because the heat from the tempering process possibly provides sufficient static strain ageing effects. It was found that the deep rolling process can be integrated fully into the hardening process of the martensitic stainless steel AISI 440C, especially in the middle of the double tempering processes. The heat of the tempering process after the deep rolling process leads to beneficial static strain ageing effects as a consequence of greater fatigue lives. Moreover, the maximum fatigue life was detected in this research, when the optimized annealing had been performed instead of the second tempering process.

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Investigations on the microstructure and mechanical properties of dissimilar welds of inconel 718 and sulphur rich martensitic stainless steel, AISI 416

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2018.03.035 ◽

2018 ◽

Vol 32 ◽

pp. 685-698 ◽

Cited By ~ 22

Author(s):

Sidharth Dev ◽

K. Devendranath Ramkumar ◽

N. Arivazhagan ◽

R. Rajendran

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Inconel 718 ◽

Martensitic Stainless Steel ◽

Microstructure And Mechanical Properties ◽

Dissimilar Welds ◽

Steel Aisi ◽

Stainless Steel Aisi

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Long Term Stability Evaluation of Stress Improvement Effect on Ni-Based Alloy Welds by Various Residual Stress Improvement Methods

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1016.819 ◽

2021 ◽

Vol 1016 ◽

pp. 819-825

Author(s):

Li Na Yu ◽

Kazuyoshi Saida ◽

Masahito Mochizuki ◽

Kazutoshi Nishimoto ◽

Naoki Chigusa

Keyword(s):

Residual Stress ◽

High Temperature ◽

Stress Relaxation ◽

Compressive Residual Stress ◽

Alloy 600 ◽

Pressurized Water ◽

Residual Stress Relaxation ◽

Temperature Environment ◽

Water Reactors ◽

High Temperature Environment

Stress corrosion cracking (SCC) is one of serious aging degradation problems for the Alloy 600 components of pressurized water reactors (PWRs). In order to prevent SCC, various methods such as water jet peening (WJP), laser peening (LP), surface polishing have been used to introduce compressive stresses at the surfaces of the PWR components. However, it has been reported that such compressive residual stress introduced by these methods might be relaxed during the practical operation, because of high temperature environment. In this study, the hardness reduction behavior of the Alloy 600 processed by LP, Buff and WJP in the thermal aging process has been investigated to estimate the stability of the residual stress improving effect by each method, based on the fact that there is a correlation between the compressive residual stress relaxation and the decrease of hardness. The behavior of the residual stress relaxation in the processed materials in the high temperature environment has been discussed with kinetic analysis.

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Prediction of machining performance using RSM and ANN models in hard turning of martensitic stainless steel AISI 420

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406218820557 ◽

2019 ◽

Vol 233 (13) ◽

pp. 4439-4462 ◽

Cited By ~ 14

Author(s):

Abderrahmen Zerti ◽

Mohamed Athmane Yallese ◽

Oussama Zerti ◽

Mourad Nouioua ◽

Riad Khettabi

Keyword(s):

Neural Network ◽

Surface Roughness ◽

Artificial Neural Network ◽

Stainless Steel ◽

Response Surface Methodology ◽

Martensitic Stainless Steel ◽

Machining Parameters ◽

Steel Aisi ◽

Artificial Neural ◽

Stainless Steel Aisi

The purpose of this experimental work is to study the impact of the machining parameters ( Vc, ap, and f) on the surface roughness criteria ( Ra, Rz, and Rt) as well as on the cutting force components ( Fx, Fy, and Fz), during dry turning of martensitic stainless steel (AISI 420) treated at 59 hardness Rockwell cone. The machining tests were carried out using the coated mixed ceramic cutting-insert (CC6050) according to the Taguchi design (L25). Analysis of the variance (ANOVA) as well as Pareto graphs made it possible to quantify the contributions of ( Vc, ap, and f) on the output parameters. The response surface methodology and the artificial neural networks approach were used for output modeling. Finally, the optimization of the machining parameters was performed using desirability function (DF) minimizing the surface roughness and the cutting forces simultaneously. The results indicated that the roughness is strongly affected by the feed rate ( f) with contributions of (80.71%, 80.26%, and 81.80%) for ( Ra, Rz, and Rt) respectively, and that the depth of cut ( ap) is the factor having the major influence on the cutting forces ( Fx = 53.76%, Fy = 50.79%, and Fz = 65.31%). Furthermore, artificial neural network and response surface methodology models correlate very well with experimental data. However, artificial neural network models show better accuracy. The optimum machining setting for multi-objective optimization is Vc = 80 m/min, f = 0.08 mm/rev and ap = 0.141 mm.

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Comparative Analysis on Wiper and Standard Tools in Dry Finish Turning of Martensitic Stainless Steel AISI 420

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.845.765 ◽

2013 ◽

Vol 845 ◽

pp. 765-769 ◽

Cited By ~ 1

Author(s):

Guilherme Cortelini Rosa ◽

André J. Souza ◽

Flávio J. Lorini

Keyword(s):

Surface Roughness ◽

Stainless Steel ◽

Residual Stresses ◽

Martensitic Stainless Steel ◽

Cutting Parameters ◽

Machining Process ◽

Finish Turning ◽

Aisi 420 ◽

Steel Aisi ◽

Stainless Steel Aisi

Machining performance consists to associate the optimal process and cutting parameters and maximum material removal rate with the most appropriate tool while controlling the machined surface state. This work verifies the influence of standard and wiper cutting tools on generated surface roughness and residual stress in dry finish turning operation of the martensitic stainless steel AISI 420 in a comparative way. Tests are conducted for different combinations of tool nose geometry, feed rate and depth of cut being analyzed through the Design of Experiments regarding to surface roughness parametersRaandRt. Moreover, the formation of residual stresses in the material (using the technique of X-Ray Diffraction) was evaluated after the machining process for these two cutting geometries and thereafter the result was compared between them. An ANOVA is performed to clarify the influence of cutting parameters on generated surface roughness, which outputs inform that cutting tool geometry is the most influent onRaandRt. It is concluded that analyzed wiper inserts present low performance for low feed rates. Regarding the analysis of the residual stresses it can be stated that for standard and wiper tools the values collected show that for finish turning the compression stresses were found. It can be observed that the greatest amount of compressive stress has been found for the standard tool.

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