Determination on the Effect of Tin Content on Microstructure, Hardness, Optimum Aging Temperature and Aging Time for Spinodal Bronze Alloys Cast in Metal Mold

Shankar, Karthik V.

doi:10.1007/s40962-016-0034-6

Cited by 23 publications

(6 citation statements)

References 15 publications

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“…The decomposition of the solid solution occurs upon heating, and it is accompanied by a decrease in the lattice parameter of copper due to the precipitation of the dispersed phase of the intermetallic compound, which leads to an increase in the microhardness and thermal stability of the material. In this case, the effect is already realized at a temperature of 250 • C, which is 100 • C lower than for cast bronzes [48]. This can be facilitated by the presence of ordered associates in the grain-boundary phase, which can serve as nuclei of a new phase.…”

Section: Discussionmentioning

confidence: 90%

Mechanical Alloying of Copper- or Iron-Based Metallic Binders for Diamond Tools

Vityaz

Kovaliova

Жорник

et al. 2023

Powders

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Powder mixtures based on copper or iron are used as metal binder materials in the manufacturing of abrasive and cutting tools. This article discusses some aspects and possibilities of using a high-energy ball milling process to modify the structure and properties of Cu-Sn, Cu-Sn-Ti and Fe-Ti powders, their sintered materials and composites with diamond. The structures of powders and sintered materials, as well as the binder-to-diamond interfaces in metal matrix composites with diamond fillers, were studied by XRD analysis, scanning electron microscopy and X-ray spectroscopy. Tribological properties and thermal stability of materials in the temperature range of 250–800 °C were investigated. Various mechanisms of dispersion strengthening during the heating of sintered materials are described. It is shown that due to the grain boundary distribution of titanium, it is possible to obtain single-phase powders in the form of a supersaturated solid solution of CuSn20Ti5 and FeTi20, which ensure the formation of thermally hardened alloys with a microhardness of 357–408 HV and 561–622 HV, respectively, in the temperature range of 350–800 °C. The wear resistance of sintered powder alloys increases more than twice. Furthermore, the simultaneous enhancement in both the strength and ductility of metal–diamond titanium-containing composites is achieved through the nanostructural state and the formation of a thin layer (up to 2 μm) of titanium carbide at the interface between the metal matrix and diamond. The developed alloy shows great potential as a binder in diamond tools which are designed for machining abrasive materials.

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Section: Discussionmentioning

confidence: 90%

Mechanical Alloying of Copper- or Iron-Based Metallic Binders for Diamond Tools

Vityaz

Kovaliova

Жорник

et al. 2023

Powders

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“…This resulted in obtaining spinodal alloys with excellent corrosion resistance, fatigue property, and tensile strength. Therefore, to govern the effect of Sn addition on the microstructure and hardness of spinodal bronze alloys, an experiment was performed by Shankar et al [ 6 ]. Three of the elements were combined by heating them in an electric furnace at a temperature of 825 °C for 10 h and then aged for 1–5 h at 250, 300, 350, 400, and 450 °C.…”

Section: Effect Of Sn Additionsmentioning

confidence: 99%

Titanium in Cast Cu-Sn Alloys—A Review

et al. 2021

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The article reviews the progress made on bronze alloys processed through various casting techniques, and focuses on enhancements in the microstructural characteristics, hardness, tensile properties, and tribological behaviour of Cu-Sn and Cu-Sn-Ti alloys. Copper and its alloys have found several applications in the fields of automobiles, marine and machine tools specifically for propellers in submarines, bearings, and bushings. It has also been reported that bronze alloys are especially used as an anti-wear and friction-reducing material to make high performance bearings for roller cone cock bits and warships for defence purposes. In these applications, properties like tensile strength, yield strength, fatigue strength, elongation, hardness, impact strength, wear resistance, and corrosion resistance are very important; however, these bronze alloys possess only moderate hardness, which results in low wear resistance, thereby limiting the application of these alloys in the automobile industry. The major factor that influences the properties of bronze alloys is the microstructure. Morphological changes in these bronze alloys are achieved through different manufacturing techniques, such as casting, heat treatment, and alloy addition, which enhance the mechanical, tribological, and corrosion characteristics. Alloying of Ti to cast Cu-Sn is very effective in changing the microstructure of bronze alloys. Reinforcing the bronze matrix with several ceramic particles and surface modifications also improves the properties of bronze alloys. The present article reviews the techniques involved in changing the microstructure and enhancing the mechanical and tribological behaviours of cast Cu-Sn and Cu-Sn-Ti alloys. Moreover, this article also reviews the industrial applications and future scope of these cast alloys in the automobile and marine industries.

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“…In mechanical systems, it is much more attractive to use unalloyed or low-alloyed materials that can be easily shaped, provide the necessary structural properties, by applying different surface techniques, instead of expensive materials with high wear resistance [5]. With recent advancements in surface coating and surface hardening techniques targeting increased wear resistance, revolutionary changes in the development of various engineering designs and components have been made possible.…”

Section: Introductionmentioning

confidence: 99%

Effect of Boronizing and WC Coating on the High Temperature Mechanical Behavior of AISI 321 Stainless Steel

Bilgin

Yapıcı

2022

SSP

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In the current paper, the effect of two different coating techniques of boronizing and tungsten carbide (WC) coating on the room and high temperature tensile behavior of the AISI 321 stainless steel were investigated. Consequently, the fracture morphology observations were conducted via scanning electron microscopy (SEM) to inspect the variation of fracture mechanisms after implementing different coating methods. The results of tensile tests at room temperature revealed that despite boronizing reduced the yield strength of the sample due to the softening and grain growth at high coating temperature, the dispersion of boron particles improved the work hardening and ductility of boronized AISI 321. In contrast, the strain to failure of the WC coated sample was decreased due to the fast fracture of the ceramic WC layer at both room and high tensile tests. Furthermore, results of SEM revealed that particle decomposition occured on the fracture surface of the boronized 321 stainless steel represented by dispersed boron particles on the edges of the dimples after failure at high temperature.

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Determination on the Effect of Tin Content on Microstructure, Hardness, Optimum Aging Temperature and Aging Time for Spinodal Bronze Alloys Cast in Metal Mold

Cited by 23 publications

References 15 publications

Mechanical Alloying of Copper- or Iron-Based Metallic Binders for Diamond Tools

Mechanical Alloying of Copper- or Iron-Based Metallic Binders for Diamond Tools

Titanium in Cast Cu-Sn Alloys—A Review

Effect of Boronizing and WC Coating on the High Temperature Mechanical Behavior of AISI 321 Stainless Steel

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