Wyniki wyszukiwania - BazTech

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Role of tool rotational speed on the tribological characteristics of magnesium based AZ61A/TiC composite developed via friction stir processing route

Sagar P., Handa A.

Journal of Achievements in Materials and Manufacturing Engineering

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2020

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Vol. 101, nr 2

60--75

EN

Purpose: A new composite material was prepared and Different properties such as hardness and tribological behaviour of the fabricated metal matrix composite (MMC) was investigated and compared with the base AZ61A magnesium alloy. Design/methodology/approach: For the current research work, state-of-the-art technology, Friction stir processing (FSP) was performed to develop magnesium based AZ61A/TiC composite at optimized set of machine parameters. Findings: Increasing tool rotational speed ultimately leads in enhanced hardness, which further gives superior tribological properties as compared to base AZ61A alloy. Wear observations suggests a combination of abrasive and adhesive wear mechanism. Research limitations/implications: More microstructural and mechanical properties can be examined. Practical implications: The idea behind selecting AZ61A is mainly due to its increasing use in bicycle pedals and military equipment’s where at certain places it needs to encounter friction. In this current work, microhardness study and wear behaviour of AZ61A/TiC composite processed via FSP were examined. Originality/value: Paper is completely new and no work has been done till date considering this material and preparing composite with nanoparticles TiC.

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Effects of multi-pass FSP on the β phase (Mg17Al12) distribution and mechanical properties of AZ91C magnesium alloy

Rouhi S., Dadashpour M., Mostafapour A., Doniavi A.

Journal of Achievements in Materials and Manufacturing Engineering

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2017

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Vol. 82, nr 2

77--85

EN

Purpose: The principle and advantages of friction stir processing (FSP) for the production of a highly formable Mg alloy, and some convincing experimental results are reported in this paper. The aim is to understand the relationship between the microstructure characteristics and the mechanical properties behaviour of the number of FSP passes AZ91C alloy. Design/methodology/approach: FSP is a solid state processing technique which involves plunging and traversing a square pin profiles FSP tool through the material. In this study, a fine-grained multi-phase AZ91C magnesium alloy was produced by applying FSP on as-cast AZ91C alloy. Findings: FSP achieved grain refinement and homogenization of the as-cast microstructure in Mg alloy AZ91C. FSP produced a fine homogeneous microstructure having a grain size of 6 μm throughout the plate. Also tensile properties of the specimen produced in one, two and three passes were investigated by standard tensile test. Results show that FSP improved the tensile characteristics of the as cast AZ91C alloy significantly. As the number of passes increased, higher UTS and TE were achieved due to finer grains and more dissolution of β phase (Mg17Al12). Originality/value: The present study shows that FSP is an efficient production method for a large-scale plate of a highly formable Mg alloy.

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Badanie procesu tarciowej modyfikacji warstw wierzchnich (FSP - Friction Stir Processing)

Węglowski M. S., Hamilton C.

Biuletyn Instytutu Spawalnictwa w Gliwicach

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2013

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R. 57, nr 1

35-44

PL

Przedstawiono wyniki badań procesu FSP prowadzonego na odlewniczym stopie aluminium AlSi9Mg. Badania obejmowały określenie wpływu warunków prowadzenia procesu na moment działający na narzędzie oraz temperaturę w obszarze mieszania. Wyniki badań wykazały, że wzrost prędkości obrotowej narzędzia powoduje zmniejszenie momentu działającego na nie oraz wzrost temperatury w obszarze narzędzia. Równocześnie wykazano, iż wzrost prędkości przesuwu narzędzia powoduje wzrost momentu oraz niewielkie zmiany temperatury. Wyniki pomiarów eksperymentalnych porównano z wynikami obliczeń numerycznych.

EN

It has been presented the results of investigations into friction stir processing carried out on the AlSi9Mg aluminium casting alloy. The investigations referred to the determination of the influence of process conditions on the moment of force affecting the tool and on the temperature in the stirring zone. The results of the investigations have shown that the increase in the rotational speed of the tool causes the decrease in the moment affecting it and the increase in the temperature in the tool area. It has been shown also that the increase in the rate of the tool travel brings about the increase in the moment of force and small changes in the temperature. The experimental measurement results have been compared to numerical calculation ones.

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Technologia Friction Stir Processing - nowe możliwości

Węglowski M. S.

Biuletyn Instytutu Spawalnictwa w Gliwicach

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2011

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R. 55, nr 2

25-31

PL

Przedstawiono nową technologię tarciowej modyfikacji warstw wierzchnich z mieszaniem materiału (ang. Friction Stir Processing - FSP). Technologia ta wywodzi się z metody zgrzewania tarciowego z mieszaniem materiału zgrzeiny (Friction Stir Welding - FSW). Na podstawie przeglądu literatury omówiono urządzenia, narzędzia, zalety oraz możliwe zastosowania technologii FSP. Stwierdzono, iż technologia ta powinna znaleźć uznanie w polskim przemyśle, który jest coraz bardziej zainteresowany wdrażaniem innowacyjnych technologii.

EN

It has been presented a new technology of friction stir modification of material top layers. This technology is derived from that of friction stir welding. On the basis of a literature survey, the following is described: equipment, tools, advantages and possible applications of FSP technology. It has been found that the technology should gain recognition in Polish industry which is more and more interested in implementation of advanced technologies.