Friction Processing Technologies

Nicholas, E.D.

doi:10.1007/bf03266402

Cited by 72 publications

(40 citation statements)

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“…Applied downwards force, rotational speed and plunge depth (equivalent to consumable length. The FHPP was initially developed by specialists at TWI (The Welding Institute) aiming to create a safer and more efficient technique weld joints production and localized damage repairing in metallic structures 11 . The process involves firstly the machining a hole in order to remove the region containing a previous detrimental discontinuity followed by co-axial rotation a consumable plug under controlled load generating frictional heat which continuously produces a plasticized layer responsible for the complete hole filling 8,12 ( Figure 1 and Figure 2).…”

Section: Introductionmentioning

confidence: 99%

“…Applied downwards force, rotational speed and plunge depth (equivalent to consumable length. Further research on the FHPP technique extended its potential applications to crack repair 11,13 , hole filling 9,14 , cladding and material processing 8 . Due to this processing adaptable quality, further works showed its applicability in different materials such as low carbon steels with different axial forces, 50, 200, 250, 300, 350 and 400 kN 8,9,15,16 .…”

Section: Introductionmentioning

confidence: 99%

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Microstructural behavior of SAF 2205 Duplex Stainless Steel Welded by Friction Hydro Pillar Processing

et al. 2016

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The Friction Hydro-Pillar Process (FHPP) is an innovative process that has been recently studied regarding its possible in situ repair applications. There is still no literature about usage of the FHPP on duplex stainless steel (DSS) base materials to smaller forces than 25 kN. The investigation on DSS processing is crucial due his wide variety of critical uses in pipes and storage structures applied in chemical industry plants, where usual welding processes may lead to safety concerns. The aim of this study is to qualify the processing of SAF 2205 (UNS 31803) duplex stainless steel welded joints using FHPP as feasible repair procedure. For this, the studied samples were welded applying a range of axial forces. The welded joints were characterized by, α/γ phase ratio, intermetallic quantification, austenite spacing measurement, microhardness profile and microstructural qualitative studies. The results showed the efficiency in repair of the FHPP process on the production of DSS joints according with the material recommendations from the standard DNV-RP-F112.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructural behavior of SAF 2205 Duplex Stainless Steel Welded by Friction Hydro Pillar Processing

et al. 2016

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“…Neste processo, a junta é produzida no estado sólido, uma vez que o calor é gerado através do atrito das superfícies dos componentes. A técnica envolve a rotação e consumo de um pino em uma matriz com uma abertura côncava enquanto é aplicada uma força, gerando calor de fricção, o que plastifica o material, propiciando a união metalúrgica [3]. A Figura 1 apresenta uma representação esquemática do processo FHPP.…”

Section: Introductionunclassified

Avaliação Da Tenacidade Ao Impacto De Um Aço C-Mn Soldado Por Fricção Com Pino Consumível

Freitas¹,

Leal²,

Macedo³

et al. 2018

ABM Proceedings

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ResumoO processo de soldagem por fricção é uma técnica recente que vem sendo desenvolvida a fim de melhorar a qualidade das estruturas offshore. Com a finalidade de aperfeiçoar essa técnica é importante estudar as propriedades metalúrgicas do material soldado. Este trabalho tem como objetivo avaliar a tenacidade ao impacto de um aço C-Mn soldado por fricção com pino consumível, conhecido como FHPP (Friction Hydro Pillar Process). Desta forma, no presente estudo o material foi soldado, tratado termicamente, e após avaliado através de análises metalográficas, de microdurezas e ensaios de impacto Charpy. Como resultados foram geradas microestruturas para as diferentes regiões da solda e foram obtidos valores de energia, segundo a norma ASTM E-23. Por fim, conclui-se que o material não processado apresentou uma tenacidade superior a região de interface soldada, devido as diferentes microestruturas geradas no processo. Palavras-chave: Soldagem por fricção com pino consumível; Microestruturas; Tenacidade ao impacto Charpy. EVALUATION OF THE IMPACT THOUGHNESS OF A C-MN STEEL WELDED BY FRICTION HYDRO PILLAR PROCESS AbstractThe friction welding process is a recent technique that has been developed with the view to improve the quality of offshore structures. In order to improve this technique is important to study the metallurgical properties of the welded material. This study aims to assess the toughness of a C-Mn steel welded by Friction Hydro Pillar Process (FHPP). Thus, in this study was carried out the welding process, the heat treatment, the metallography analyses, the hardness test and the Charpy impact tests. As result, microstructures were generated for various regions of the welded joint and the energy values were obtained according to ASTM E-23 standard. Finally, could be concluded that the base material has a greater toughness than in the interfacial area, due to the different microstructures generated in the process.

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“…A ação de se produzir calor por atrito para ser empregado em soldagem é uma técnica utilizada há muitos anos [1] . A soldagem por atrito convencional é feita através do calor produzido ao se atritar os componentes, um contra o outro, com a aplicação de uma tensão.…”

Section: Introductionunclassified

“…Figura 1: Processo de soldagem por atrito para componentes cilíndricos (a) e a soldagem por atrito linear com mistura para componentes planos (b) [1] .…”

Section: Introductionunclassified

Caracterização de junta soldada por atrito linear com mistura (FSW) da liga Al-Mg-Si AA 6063.

Paiva¹

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mostraram que o cordão de solda é assimétrico, sendo 20% maior do lado do avanço da ferramenta. Além disto, houve um refino de grão e, na transição entre a zona termomecanicamente afetada (ZTMA) e a zona afetada pelo calor (ZAC), os grãos alongados apresentaram fator de forma maior no lado do avanço (entre 1,73 e 2,74) do que no lado do retrocesso (entre 1,40 e 1,59). As extensões da zona termomecanicamente afetada e da zona afetada pelo calor são maiores do lado do avanço que do lado do retrocesso. v ABSTRACT Friction Stir Welding process arose from a desire to apply the principles and benefits of traditional solid state friction welding friction in non axi-symmetric geometries. Thus, it was added a traveling speed and a special rotating tool that allows welding aluminum alloys with bad weldability. The key factor to have a linear friction welding with sound bead is a combination of tool geometry, welding parameters and material flow during welding, which is under tension stress in the advancing side and in compression in the retrieving side. Thus, each side has different microstructures and mechanical properties.The objective of this work is to characterize the 3,0 mm weld bead of an alloy 6063 T6.This material was welded with a tool type "Three flats" with a rotation speed of 1120 rpm and welding traveling speed of 5.3 mm/s. The samples were characterized by optical microscopy, microhardness testing and tensile test. The results showed that the weld bead is asymmetric, with an area 20% higher in the advancing side. Moreover, a grain refining process occurred in the weld bead and, in the transition region between thermomechanically affected zone (TMAZ) and heat affected zone (HAZ) the elongated grains presented a shape factor higher in the advancing side (1,73 to 2,74) than in the retrieving side (1,40 to 1,59). Also, the thermomechanically affected zone and the heat affected zone presented a larger width in the advancing side than in the retrieving side.

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Friction Processing Technologies

Cited by 72 publications

References 1 publication

Microstructural behavior of SAF 2205 Duplex Stainless Steel Welded by Friction Hydro Pillar Processing

Microstructural behavior of SAF 2205 Duplex Stainless Steel Welded by Friction Hydro Pillar Processing

Avaliação Da Tenacidade Ao Impacto De Um Aço C-Mn Soldado Por Fricção Com Pino Consumível

Caracterização de junta soldada por atrito linear com mistura (FSW) da liga Al-Mg-Si AA 6063.

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