Recent Developments in the Friction Stir Welding of Titanium Alloys

Russell, Michael J.; Blignault, C.; Horrex, N. L.; Wiesner, C.S.

doi:10.1007/bf03266662

Cited by 44 publications

(35 citation statements)

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“…Rai et al (2011) have reviewed progress in tool development and discuss how the FSW process has evolved to become relatively mature for aluminium welding. However, comparatively recently a 3 new variant to the FSW process has been proposed by Russell et al (2008); termed 'Stationary', Shoulder Friction Stir Welding (SSFSW), which has received surprisingly little attention in the literature. The SSFSW concept was first proposed by Russell et al (2008) to reduce the large through-thickness temperature gradients normally seen when welding low thermal conductivity titanium alloys.…”

Section: Introductionmentioning

confidence: 99%

“…However, comparatively recently a 3 new variant to the FSW process has been proposed by Russell et al (2008); termed 'Stationary', Shoulder Friction Stir Welding (SSFSW), which has received surprisingly little attention in the literature. The SSFSW concept was first proposed by Russell et al (2008) to reduce the large through-thickness temperature gradients normally seen when welding low thermal conductivity titanium alloys. In SSFSW the probe is rotated through a bearing assembly in the tool shoulder, which is fixed to the head of the welding machine (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Stationary shoulder FSW for joining high strength aluminum alloys

Chen

Strong

et al. 2015

Journal of Materials Processing Technology

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The new process of 'Stationary Shoulder' Friction Stir Welding (SSFSW) has been directly compared to conventional (Friction Stir Welding) using welds produced in a high strength AA7050-T7651 aluminium aerospace alloy. The process window for each approach was first compared using torque -rotation rate decay curves. Under optimum process conditions, SSFSW had a ~ 30% lower heat input than FSW and the stationary shoulder resulted in narrower welds with a reduced heat affected zone (HAZ) width. The SSFSW welds also had more uniform through thickness properties and performed better than conventional FSWs in cross-weld tensile tests. In addition it is demonstrated that SSFSW process resulted in a far superior surface finish, although the stationary shoulder lead to surface 'speed cracking' under certain welding conditions. The reasons for these benefits are discussed aided by thermal and hardness modelling.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stationary shoulder FSW for joining high strength aluminum alloys

Chen

Strong

et al. 2015

Journal of Materials Processing Technology

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“…Surface finish A potential advantage of static shoulder welding is the superior surface finish it can produce relative to FSW [2]. In the present study this was investigated using a μ-scan SC200 laser profile; typical results from which are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Systematic Evaluation of the Advantages of Static Shoulder FSW for Joining Aluminium

Chen

Strong

et al. 2014

MSF

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Abstract. Static Shoulder Friction Stir Welding (SS-FSW) is a modification to conventional FSW that was originally developed to improve the weldability of titanium alloys by reducing through thickness temperature gradients. Surprisingly, to date, there have been no published systematic studies comparing SS-FSW to FSW for aluminium welding. This may be because the high conductivity of aluminium means the heat input produced by the shoulder is thought to be beneficial. In the work presented when welding a high strength 7050 aluminium alloy, even in a relatively thin 6 mm plate, it is shown that SS-FSW has several advantages; including a reduction in the heat input, a massive improvement in surface quality, and a more uniform through thickness temperature distribution, which leads to narrower welds with a reduced heat affected zone width and more homogeneous through thickness properties. The reasons for these benefits are discussed.

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“…Nos últimos anos, a aplicação deste processo para soldagem de ligas de alta temperatura de fusão como aços, aços inoxidáveis e ligas de titânio tem atraído cada vez mais a atenção do setor aeroespacial, construção naval e petroquímica [4][5][6]. No entanto, ainda é necessária uma compreensão mais abrangente do processo, devido ao elevado custo tanto do equipamento quanto das ferramentas utilizadas para soldagem de aços e outras ligas metálicas de alta temperatura de fusão.…”

Section: Desenvolvimento Dos Parâmetros Do Processo De Soldagem Por Aunclassified

Desenvolvimento dos Parâmetros do Processo de Soldagem por Atrito com Pino Não Consumível para o Aço de Alta Resistência e Baixa Liga ISO 3183 X80M

Hermenegildo

Silva

et al. 2017

Soldag. insp.

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado. Development of Friction Stir Welding Process Parameters for the High Strength Low Alloy Steel ISO 3183 X80MAbstract: It is known that welding and rotational speeds, axial force, the inclination angle, and the tool design are the main independent input variables which are used to control the process of friction stir welding, and the heat generation rate and cooling, force in the welding direction and torque are the response variables that will change the microstructural evolution and mechanical performance of the welded joint. In this work, the behavior of these input and response variables aiming the development of friction stir welding process applied to steel API 5L X80 (ISO 3183 X80M) steel were studied. For this purpose, plates with 12 mm thick were welded by two passes using polycrystalline cubic bore nitrite tool. It was observed that, while keeping the welding speed constant, an increase in spindle speed and /or axial force, tends to reduce the reactive forces and the torque acting during the process by increasing of the heat generation rate. Otherwise, keeping spindle speed and axial force constants, the welding speed rising the forces and torque, allowing the welding speed plays a significant role in the heat generation rate during the process.Key-words: Process variables; Friction stir welding; Mechanical performance. IntroduçãoEste estudo teve como base o aço ARBL ISO 3183 X80M, produzido no Brasil pelo processo termomecânico TMCP (Thermomechanically Controlled Processing), sem resfriamento acelerado, microligado com nióbio, vanádio e titânio para refinamento de grão e endurecimento por precipitação [1,2]. O aço comercial ISO 3183 X80M, equivalente ao aço (API) 5L X80, tem uma microestrutura composta por ferrita poligonal, bainita e perlita degenerada o que lhe garante propriedades mecânicas elevadas, boa tenacidade e soldabilidade [3]. Esta combinação de propriedades tornou mais relevante a classe do aço X80 nas operações de transporte de óleo e gás, o que vem aumentando a demanda por pesquisas visando o desenvolvimento de processos de soldagem mais eficientes.

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Recent Developments in the Friction Stir Welding of Titanium Alloys

Cited by 44 publications

References 0 publications

Stationary shoulder FSW for joining high strength aluminum alloys

Stationary shoulder FSW for joining high strength aluminum alloys

Systematic Evaluation of the Advantages of Static Shoulder FSW for Joining Aluminium

Desenvolvimento dos Parâmetros do Processo de Soldagem por Atrito com Pino Não Consumível para o Aço de Alta Resistência e Baixa Liga ISO 3183 X80M

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