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S Chatterjee - One of the best experts on this subject based on the ideXlab platform.
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interfacial reactions and strength properties of diffusion bonded joints of ti64 Alloy and 17 4ph stainless steel using Nickel Alloy interlayer
Materials & Design, 2013Co-Authors: S Kundu, B Mishra, D L Olson, S ChatterjeeAbstract:Abstract Interfacial reactions and strength properties of diffusion bonded joints between Ti64 Alloy (Ti64) and 17-4 precipitation hardening stainless steel (PHSS) using a Nickel Alloy (NiA) as an interlayer was carried out in the temperature range of 800–900 °C in steps of 25 °C for 45 min and at 900 °C for 5, 10, 15, 30 and 45 min in vacuum. The effects of bonding temperature and time on interface reactions of the bonded joint were characterized by scanning electron microscopy and electron probe microanalyser. The interfaces indicate that Ni–Ti base reaction products are formed at the NiA–Ti64 interface and the PHSS–NiA interface is free from intermetallics up to 875 °C for 45 min processing temperature and at 900 °C up to 15 min processing time. The bright regions of Fe 5 Cr 35 Ni 40 Ti 15 have been observed within the Ni 3 Ti intermetallic layer. Fe–Ti and Fe–Cr–Ti bases reaction products have been observed beyond 15 min processing time at 900 °C temperature. Joint tensile was measured; a high tensile strength of ∼517.6 MPa along with ∼6.1% elongation was obtained for bonded joint when processed at 875 °C for 45 min. The bonded samples were fractured through the NiTi 2 intermetallic compounds at NiA–Ti64 interface up to 875 °C for 45 min and up to 15 min at 900 °C. However, higher processing temperature, the fracture of the joints took place through the phase mixture of NiTi 2 + Fe 2 Ti and β-Ti.
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diffusion bonding of 17 4 precipitation hardening stainless steel to ti Alloy with and without ni Alloy interlayer interface microstructure and mechanical properties
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science, 2013Co-Authors: S Kundu, G Anand, S ChatterjeeAbstract:In the present study, the diffusion bonding of 17-4 precipitation hardening stainless steel to Ti Alloy with and without Nickel Alloy as intermediate material was carried out in the temperature range of 1073 K to 1223 K (800 °C to 950 °C) in steps of 298 K (25 °C) for 60 minutes in vacuum. The effects of bonding temperature on interfaces microstructures of bonded joint were analyzed by light optical and scanning electron microscopy. In the case of directly bonded stainless steel and titanium Alloy, the layerwise α-Fe + χ, χ, FeTi + λ, FeTi + β-Ti phase, and phase mixture were observed at the bond interface. However, when Nickel Alloy was used as an interlayer, the interfaces indicate that Ni3Ti, NiTi, and NiTi2 are formed at the Nickel Alloy-titanium Alloy interface and the PHSS-Nickel Alloy interface is free from intermetallics up to 1148 K (875 °C) and above this temperature, intermetallics were formed. The irregular-shaped particles of Fe5Cr35Ni40Ti15 have been observed within the Ni3Ti intermetallic layer. The joint tensile and shear strength were measured; a maximum tensile strength of ~477 MPa and shear strength of ~356.9 MPa along with ~4.2 pct elongation were obtained for the direct bonded joint when processed at 1173 K (900 °C). However, when Nickel base Alloy was used as an interlayer in the same materials at the bonding temperature of 1148 K (875 °C), the bond tensile and shear strengths increase to ~523.6 and ~389.6 MPa, respectively, along with 6.2 pct elongation.
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diffusion bonding of titanium Alloy to micro duplex stainless steel using a Nickel Alloy interlayer interface microstructure and strength properties
Materials & Design, 2012Co-Authors: S Sam, S Kundu, S ChatterjeeAbstract:Abstract In the present study, diffusion bonding of titanium Alloy and micro-duplex stainless steel with a Nickel Alloy interlayer was carried out in the temperature range of 800–950 °C for 45 min under the compressive stress of 4 MPa in a vacuum. The bond interfaces were characterised by scanning electron microscopy, electron probe microanalyzer and X-ray diffraction analysis. The layer wise Ni 3 Ti, NiTi and NiTi 2 intermetallics were observed at the Nickel Alloy/titanium Alloy interface and irregular shaped particles of Fe 22 Mo 20 Ni 45 Ti 13 was observed in the Ni 3 Ti intermetallic layer. At 950 °C processing temperature, black island of β-Ti phase has been observed in the NiTi 2 intermetallics. However, the stainless steel/Nickel Alloy interface indicates the free of intermetallics phase. Fracture surface observed that, failure takes place through the NiTi 2 phase at the NiA–TiA interface when bonding was processed up to 900 °C, however, failure takes place through NiTi 2 and β-Ti phase mixture for the diffusion joints processed at 950 °C. Joint strength was evaluated and maximum tensile strength of ∼560 MPa and shear strength of ∼415 MPa along with ∼8.3% ductility were obtained for the diffusion couple processed at 900 °C for 45 min.
S Kundu - One of the best experts on this subject based on the ideXlab platform.
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interfacial reactions and strength properties of diffusion bonded joints of ti64 Alloy and 17 4ph stainless steel using Nickel Alloy interlayer
Materials & Design, 2013Co-Authors: S Kundu, B Mishra, D L Olson, S ChatterjeeAbstract:Abstract Interfacial reactions and strength properties of diffusion bonded joints between Ti64 Alloy (Ti64) and 17-4 precipitation hardening stainless steel (PHSS) using a Nickel Alloy (NiA) as an interlayer was carried out in the temperature range of 800–900 °C in steps of 25 °C for 45 min and at 900 °C for 5, 10, 15, 30 and 45 min in vacuum. The effects of bonding temperature and time on interface reactions of the bonded joint were characterized by scanning electron microscopy and electron probe microanalyser. The interfaces indicate that Ni–Ti base reaction products are formed at the NiA–Ti64 interface and the PHSS–NiA interface is free from intermetallics up to 875 °C for 45 min processing temperature and at 900 °C up to 15 min processing time. The bright regions of Fe 5 Cr 35 Ni 40 Ti 15 have been observed within the Ni 3 Ti intermetallic layer. Fe–Ti and Fe–Cr–Ti bases reaction products have been observed beyond 15 min processing time at 900 °C temperature. Joint tensile was measured; a high tensile strength of ∼517.6 MPa along with ∼6.1% elongation was obtained for bonded joint when processed at 875 °C for 45 min. The bonded samples were fractured through the NiTi 2 intermetallic compounds at NiA–Ti64 interface up to 875 °C for 45 min and up to 15 min at 900 °C. However, higher processing temperature, the fracture of the joints took place through the phase mixture of NiTi 2 + Fe 2 Ti and β-Ti.
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diffusion bonding of 17 4 precipitation hardening stainless steel to ti Alloy with and without ni Alloy interlayer interface microstructure and mechanical properties
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science, 2013Co-Authors: S Kundu, G Anand, S ChatterjeeAbstract:In the present study, the diffusion bonding of 17-4 precipitation hardening stainless steel to Ti Alloy with and without Nickel Alloy as intermediate material was carried out in the temperature range of 1073 K to 1223 K (800 °C to 950 °C) in steps of 298 K (25 °C) for 60 minutes in vacuum. The effects of bonding temperature on interfaces microstructures of bonded joint were analyzed by light optical and scanning electron microscopy. In the case of directly bonded stainless steel and titanium Alloy, the layerwise α-Fe + χ, χ, FeTi + λ, FeTi + β-Ti phase, and phase mixture were observed at the bond interface. However, when Nickel Alloy was used as an interlayer, the interfaces indicate that Ni3Ti, NiTi, and NiTi2 are formed at the Nickel Alloy-titanium Alloy interface and the PHSS-Nickel Alloy interface is free from intermetallics up to 1148 K (875 °C) and above this temperature, intermetallics were formed. The irregular-shaped particles of Fe5Cr35Ni40Ti15 have been observed within the Ni3Ti intermetallic layer. The joint tensile and shear strength were measured; a maximum tensile strength of ~477 MPa and shear strength of ~356.9 MPa along with ~4.2 pct elongation were obtained for the direct bonded joint when processed at 1173 K (900 °C). However, when Nickel base Alloy was used as an interlayer in the same materials at the bonding temperature of 1148 K (875 °C), the bond tensile and shear strengths increase to ~523.6 and ~389.6 MPa, respectively, along with 6.2 pct elongation.
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diffusion bonding of titanium Alloy to micro duplex stainless steel using a Nickel Alloy interlayer interface microstructure and strength properties
Materials & Design, 2012Co-Authors: S Sam, S Kundu, S ChatterjeeAbstract:Abstract In the present study, diffusion bonding of titanium Alloy and micro-duplex stainless steel with a Nickel Alloy interlayer was carried out in the temperature range of 800–950 °C for 45 min under the compressive stress of 4 MPa in a vacuum. The bond interfaces were characterised by scanning electron microscopy, electron probe microanalyzer and X-ray diffraction analysis. The layer wise Ni 3 Ti, NiTi and NiTi 2 intermetallics were observed at the Nickel Alloy/titanium Alloy interface and irregular shaped particles of Fe 22 Mo 20 Ni 45 Ti 13 was observed in the Ni 3 Ti intermetallic layer. At 950 °C processing temperature, black island of β-Ti phase has been observed in the NiTi 2 intermetallics. However, the stainless steel/Nickel Alloy interface indicates the free of intermetallics phase. Fracture surface observed that, failure takes place through the NiTi 2 phase at the NiA–TiA interface when bonding was processed up to 900 °C, however, failure takes place through NiTi 2 and β-Ti phase mixture for the diffusion joints processed at 950 °C. Joint strength was evaluated and maximum tensile strength of ∼560 MPa and shear strength of ∼415 MPa along with ∼8.3% ductility were obtained for the diffusion couple processed at 900 °C for 45 min.
Darko Makovec - One of the best experts on this subject based on the ideXlab platform.
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The synthesis of iron-Nickel Alloy nanoparticles using a reverse micelle technique
Journal of Magnetism and Magnetic Materials, 2017Co-Authors: Mihael Drofenik, Irena Ban, Darko MakovecAbstract:Nanosized Fe0.2Ni0.8 particles were prepared by reducing their salts with sodium borohydride (NaBH4) in cationic water-in-oil (w/o) microemulsions of water/cetyl-trimethyl-amonium bromide (CTAB) and n-butanol/isooctane at 25 °C.According to the TEM and X-ray diffraction analyses, the synthesized particles were around 4-12 nm in size. Due to their nanodimensions, the particles had a primitive cubic (pc) structure rather than the body-centered cubic (BCC) structure of the bulk material. An examination of the synthesis from the reverse micelle reveals that the morphology of the iron-Nickel Alloy nanoparticles depends mainly on the microemulsion`s composition. The magnetization of the nanoparticles was much lower than that of the bulk material, reflecting the influence of the nanodimensions on the particlesć magnetizations.
D Mcintosh - One of the best experts on this subject based on the ideXlab platform.
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power and wheel wear for grinding Nickel Alloy with plated cbn wheels
Cirp Annals-manufacturing Technology, 2007Co-Authors: C Guo, Z Shi, Helmi Attia, D McintoshAbstract:Electroplated CBN grinding wheels are manufactured with a single layer of abrasive grains. The grinding performance of these plated wheels changes significantly as the wheel wears down. The present investigation was undertaken to understand the transient grinding behavior with electroplated CBN wheels in order to provide a logical basis for process control. In this paper, particular attention is directed to the effect of wheel wear and operating parameters on grinding of a Nickel Alloy. Wheels were worn to various stages and then used to perform grinding tests under various grinding conditions to measure grinding forces and power and to produce ground specimens. Based on models for grinding with conventional aluminum oxide wheels, a power model for grinding of a Nickel Alloy with plated CBN wheels was established and validated. Microscopic observations of the ground specimens reveal that thermal damage in the form of a White Etch Layer (WEL) appears only when grinding with a worn wheel under conditions that lead to high temperatures.
M Jalali - One of the best experts on this subject based on the ideXlab platform.
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study of the corrosion properties of zinc Nickel Alloy electrodeposits before and after chromating
Journal of Materials Processing Technology, 2003Co-Authors: Heydarzadeh M Sohi, M JalaliAbstract:Abstract In this study, corrosion behavior of zinc–Nickel Alloy electrodeposits on steel sheets has been investigated using the neutral salt spray test. The performance of the coatings with various Nickel contents (up to 28 wt.%) was compared with electrodeposited zinc coating. The results show that the corrosion resistance of zinc–Nickel Alloy coatings is superior to that of pure zinc coating and the zinc–13 wt.% Nickel gives the best protection. The corrosion behavior of chromated zinc–Nickel Alloy coatings was also studied. The results show that chromate conversion coating increases the corrosion resistance significantly (up to 3–4 times), and the best corrosion resistance is achieved by chromating of zinc–13 wt.% Nickel Alloy coating.
