Microstructural analysis, radiography, tool wear characterization, induced residual stress and corrosion behavior of conventional and cryogenic trepanning of DSS 2507

Sastry, C. Chandrasekhara; Abeens, M.; Pradeep, N.; Manickam, M. A. Muthu

doi:10.1007/s12206-020-0529-1

Cited by 20 publications

(33 citation statements)

References 40 publications

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“…TOPSIS, among them, holds its ground as it evaluates with minimal variation, has a lower computational complex and ensures that a common vertices plane is obtained, which postulates a close to ideal solution and negates the far from ideal solution [31]. The methodology of the decision-making in TOPSIS method is highlighted in Figure 4 [32]. The criteria of importance for factors under consideration is listed out by SIMO's weighting criteria method which is tabulated in Table 3.…”

Section: Ecmm Experiments In Disparate Environmental Conditionsmentioning

confidence: 99%

Experimental investigation of the electrochemical micromachining process of Ti-6Al-4V titanium alloy under the influence of magnetic field

Gopinath

Prasanna

Sastry

et al. 2021

Materials Science-Poland

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An attempt has been made to study the influence of magnetic field on the micro hole machining of Ti-6Al-4V titanium alloy using electrochemical micromachining (ECMM) process. The presence of magneto hydro dynamics (MHD) is accomplished with the aid of external magnetic field (neodymium magnets) in order to improve the machining accuracy and the performance characteristics of ECMM. Close to ideal solution for magnetic and nonmagnetic field ECMM process, the parameters used are as follows: concentration electrolyte of 15 g/l; peak current of 1.35 A; pulse on time of 400 s; and duty factor of 0.5. An improvement of 11.91–52.43% and 23.51–129.68% in material removal rate (MRR) and 6.03–21.47% and 18.32–33.09% in overcut (OC) is observed in ECMM of titanium alloy under the influence of attraction and repulsion magnetic field, respectively, in correlation with nonmagnetic field ECMM process. A 55.34% surface roughness factor reduction is ascertained in the hole profile in magnetic field-ECMM in correlation with electrochemical machined titanium alloy under nonmagnetic field environment. No machining related stress is induced in the titanium alloy, even though environment of electrochemical machining process has been enhanced with the presence of magnetic field. A slight surge in the compressive residual factor, aids in surge of passivation potential of titanium alloy, resulting in higher resistance to outside environment.

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Section: Ecmm Experiments In Disparate Environmental Conditionsmentioning

confidence: 99%

Experimental investigation of the electrochemical micromachining process of Ti-6Al-4V titanium alloy under the influence of magnetic field

Gopinath

Prasanna

Sastry

et al. 2021

Materials Science-Poland

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“…With the surge in the density factor along the machined surface, curtailment was ascertained in the average size of the WEDM machined Al-SiC-TiC composite sample, which indicates a surge in the residual stress factor [25,26]. Additionally, aluminum being the major phase particle, the intermetallic phases formed cause a surge in the factor of residual stress at disparate WEDM machining conditions [27][28][29][30]. As the gradient heat was high in the OWP dielectric medium, the latent heat of fusion acting on the surface induced fine grains along the surface of the machined composite.…”

Section: Residual Stressmentioning

confidence: 99%

“…The surface roughness factor and waviness increase was also attributed to the variation in melting temperatures of TiC (3165 • C) and Al-SiC (2643 • C), which caused erratic fine grain disorientations in the WEDM machined composite under the OWP dielectric medium. The analysis holds significance to comprehend the deviations for applications requiring high tolerance values of the composite application [29][30][31].…”

Section: Topographical Studymentioning

confidence: 99%

“…The presence of high barrier potential elements of Al, TiC in the composite is further aided by the surge in roughness occurring in the OWP dielectric medium, causing a drop in the pitting potential for corrosion to take place [28,29]. A drop in the interatomic spacing due to the compressive residual factor causes further refinement in grain size along the surface, augmenting the passivation barrier inherently surging the corrosion resistance of the OWP dielectric WEDM sample [30]…”

Section: Corrosion Analysismentioning

confidence: 99%

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Experimental Investigation of Wire-EDM Machining of Low Conductive Al-SiC-TiC Metal Matrix Composite

Murari¹,

Selvakumar

Sastry

2020

Metals

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The application of metal matrix composites (Al-SiC-TiC) in aerospace and defense industries have surged in the areas of hull safety, aviation fins, and closure units. The close to ideal solution for generating powdered mixture availing ball milling, for processing of a metal matrix composite of size 24 × 24 × 5.95 cm3 and composition of 75% Al, 10% SiC, and 10% TiC weight composition is 10:1 ball weight ratio, ball size of 8 mm, rotation speed of 250 rpm, and milling time of 4 h. The powdered mixture is compressed to pellet, sintered for two hours, and further silver coated in a physical vapor deposition setup to surge its electrical conductivity for ease of material removal. To obtain a perfect fit and finish, wire electrical discharge machining cycle has been carried out to machine the component under deionized water and oil + wax + paraffin dielectric mediums in 8 A peak current, 0.45 µs pulse on time, and 45 pulse off time as close to ideal solution, obtained by the technique for the order of preference by similarity to the ideal solution (TOPSIS) analysis. A surge is ascertained in kerf width, material removal rate, and surface roughness in oil + wax + paraffin environment in correlation with deionized water by 0.99–12.78%, 0.18–33.97%, and 2.15–36.86% respectively. The surface morphological study indicates a 32.28%, 42.57%, and 45.73% surge in residual compressive stress, surface roughness and corrosion resistance in oil + wax + paraffin dielectric medium in correlation to deionized water.

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“…Residual stresses are induced into the materials due to plastic deformation, annealing, phase transformation and welding in material components [27]. Residual stress is an important criterion for choosing the cladding material for nuclear applications because of severe plastic deformation processes such as rotary swaging, extrusion, the rolling process, and hot pressure torsion and dissimilar metal welding used for processing this alloy [28][29][30]. Residual stresses are measured by different methods such as, X-Ray diffraction (XRD), hole drilling and deep hole drilling, and the hole contour method and block removal [31].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis and Experimental Evaluation of Residual Stress of Zr-4 alloys Processed through Swaging

Singh

Kalita

Narayanan³

et al. 2020

Metals

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Zirconium alloy has been extensively used as a cladding material in nuclear power reactors due to its low neutron absorption cross section, excellent mechanical properties, and corrosion resistance. The influence of the swaging parameter, feed rate (0.7, 1.25, 2 m/min) on residual stress induced in Zr-4 alloy is investigated in the present work. A three-dimensional finite element model was implemented in the Deform 3D software to simulate the rotary swaging (RS) process over a circular rod of Zr-4 alloy. The simulation results based on the 3D framework provide a detailed insight of residual stress, true stress versus true strain and force applied over the rod during the multiple pass swaging process; the results are compared with experimental results. The experimental hole drilling method is used to determine the residual stresses on swaged zirconium alloy at different feed rates (0.7, 1.25, and 2 m/min). A similar trend of residual stress between experimental and numerical results from the surface to the center on the swaged rod samples is observed. The same magnitude of residual stress at the surface of the swaged Zr-4 rod is also observed. It is found to be compressive at the surface and tensile in the center of the samples, as observed in the present work.

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Microstructural analysis, radiography, tool wear characterization, induced residual stress and corrosion behavior of conventional and cryogenic trepanning of DSS 2507

Cited by 20 publications

References 40 publications

Experimental investigation of the electrochemical micromachining process of Ti-6Al-4V titanium alloy under the influence of magnetic field

Experimental investigation of the electrochemical micromachining process of Ti-6Al-4V titanium alloy under the influence of magnetic field

Experimental Investigation of Wire-EDM Machining of Low Conductive Al-SiC-TiC Metal Matrix Composite

Finite Element Analysis and Experimental Evaluation of Residual Stress of Zr-4 alloys Processed through Swaging

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