Growth Kinetics of &amp;beta;-Ti Solid Solution in Reaction Diffusion

Taguchi, Osamu; Tiwari, G.P.; Iijima, Yoshiaki

doi:10.2320/matertrans.44.83

Cited by 13 publications

(7 citation statements)

References 17 publications

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“…Thus, the time dependence of the thickness of the reaction layer at 1023 K was investigated ( Figure 5 ). The thickness of the reaction layer formed by reaction diffusion was proportional to the square root of the diffusion time (s), which is in good agreement with the results of previous studies [ 20 , 21 ]. The fitting result shows good linearity, implying the layer growth obeys the parabolic law, indicative of a diffusion-controlled growth, expressed as l = k·t 1/2 .…”

Section: Resultssupporting

confidence: 91%

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A Joining Process between Beryllium and Reduced-Activation Ferritic–Martensitic Steel by Plasma Sintering

Kim

Nakamichi

2021

Materials

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To investigate the growth kinetics of the reaction layer and mechanical strength of joined materials, we joined beryllium and reduced-activation ferritic–martensitic steel (F82H) by plasma sintering under various conditions and characterized the joined region. Scanning electron microscopy revealed that the thickness of the reaction layer increased with an increase in the joining time and temperature. Line analyses and elemental mapping using an electron microprobe analyser showed that the reaction layer consists of Be–Fe intermetallic compounds, including Be12Fe, Be5Fe, and Be2Fe, with small amounts of chromium and tungsten. Owing to the time and temperature dependence of the reaction-layer thickness, the layer growth of Be–Fe intermetallic compounds obeys the parabolic law, and the activation energy for the reaction-layer growth was 116.2 kJ/mol. The bonding strengths of the joined materials varied inversely with the thickness of the reaction layer.

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Section: Resultssupporting

confidence: 91%

“…Good linearity was obtained, and the activation energy for the growth rate of the reaction layer was 116.2 kJ/mol, which is similar to that of Cu–Al intermetallic compound [ 22 ] and lower than that of β–Ti in Ti alloys [ 20 ]. The bonding strength of the Be/F82H joint was evaluated ( Figure 7 ).…”

Section: Resultsmentioning

confidence: 78%

A Joining Process between Beryllium and Reduced-Activation Ferritic–Martensitic Steel by Plasma Sintering

Kim

Nakamichi

2021

Materials

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“…A similar study by Ferrante et al [17] has reported a Q value of 195 kJ mol -1 for growth of the diffusion zone consisting of bTi(Fe) phases in diffusionbonded 316LSS/Ti-6Al-4V joints. In contrast, Taguchi et al [18] have reported a high value of 360 kJ mol -1 for growth of bTi(Fe) phase during annealing in the temperature range of 677-867°C. Hence, it is obvious from literature that the presence of intermetallic phases and secondary phases at the interface control the overall growth of the reaction zones [19].…”

Section: Introductionmentioning

confidence: 86%

Effect of alloying elements on interdiffusion phenomena in explosive clads of 304LSS/Ti–5Ta–2Nb alloy

2016

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Dissimilar joints of 304L austenitic stainless steel (SS) and Ti-5Ta-2Nb alloy were fabricated using explosive cladding process with an aim to avoid the formation of brittle intermetallic phases at the interface. Subsequently, diffusion annealing heat treatments were carried out at temperatures in the range of 550-800°C for various durations. In the present study, concentration and temperature dependence of the distinct diffusion zones, formed at the clad interface, due to interdiffusion of the alloying elements, have been established using Electron Probe Micro Analysis and imaging of the interface. Molar volume showed a close match with the ideal Vegard's law at low temperatures while a non-linear negative deviation has been observed at high temperatures (800°C) due to the formation of secondary phases such as FeTi, Fe 2 Ti and bTi(Fe) phases. Interdiffusion parameters evaluated by Wagner's method showed sluggish diffusion kinetics of Fe and Ti at concentration corresponding to a two phase mixture of FeTi and Fe 2 Ti. Further, an attempt has been made to understand multicomponent diffusion using Dayananda's approach and estimation of effective interdiffusion coefficients revealed *22 lm shift of the interface from Matano plane at 800°C.

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“…Along with experimental work on solid-melt mass transfer and alloy layer growth, which yielded results that could not clearly establish the kinetics of alloy layer growth, a parabolic growth rate of multiphase systems by pure systems has been reported from several pure metal systems based on theoretical calculation and modelling [56,209].…”

Section: Kinetics Of Growth Of the Intermetallic Compound Layer Durin...mentioning

confidence: 99%

A review on metallurgical features of hot-dip aluminized steel

et al. 2023

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Among the various surface modification processes, the hot-dip aluminizing process has increasingly evoked considerable attention. This method has proved to be commercially cost-effective and technically better than galvanizing. In contrast to hot-dip aluminized steel components, galvanized components cannot be used in service conditions at elevated temperatures. During the last few years, intensive research by researchers has yielded new insights into metallurgical aspects of aluminized coating in as-dipped and annealed condition. The present review gives a bird’s eye view of the hot-dip aluminizing process, from the early years of its inception to the current research on aspects of the aluminized coating. The progress of research on thermodynamic studies, phase equilibria, phase identification, and their crystallographic features have been traced in this attempt. This review is not restricted to briefing the research performed so far but also points out several issues of discrepancies among the results of the published literature. Special emphasis has been given to the phase development in the coating during annealing and the increasing horizon of application of hot-dip aluminizing to alloy steels in hot stamped conditions. Reference has also been made to state-of-the-art topics embracing the current research on computer simulation software and sophisticated experimental techniques. However, lower surface hardness and economy restrict the wide application of the hot-dipping process.

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Growth Kinetics of β-Ti Solid Solution in Reaction Diffusion

Cited by 13 publications

References 17 publications

A Joining Process between Beryllium and Reduced-Activation Ferritic–Martensitic Steel by Plasma Sintering

A Joining Process between Beryllium and Reduced-Activation Ferritic–Martensitic Steel by Plasma Sintering

Effect of alloying elements on interdiffusion phenomena in explosive clads of 304LSS/Ti–5Ta–2Nb alloy

A review on metallurgical features of hot-dip aluminized steel

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