Effect of precipitation on post-heat-treated Inconel 625 alloy after friction stir welding

Song, Kuk Hyun; Nakata, Kohei

doi:10.1016/j.matdes.2009.12.020

Cited by 100 publications

(63 citation statements)

References 6 publications

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“…3(b). These results are similar to those obtained previously with Inconel 600 and Inconel 625 [8,9]. The temperature hysteresis curve during the FSW is shown in Fig.…”

Section: Resultssupporting

confidence: 91%

“…5(b). Similar results were previously obtained in a research conducted on materials with a high melting point [8][9][10]. Therefore, it is considered that the band structure occurred as a result of tool wear due to the higher friction load between material and tool during FSW.…”

Section: Resultssupporting

confidence: 87%

“…In particular, it has been reported previously that the precipitations of gamma double prime (␥ ) in the grains and M 23 C 6 carbides in the grain boundaries are effective in improving mechanical properties [4]. However, researches on precipitations with friction-stir-welded Ni-based superalloys have rarely been reported until now [8]. Therefore, in this study, FSW of an age hardenable alloy Inconel 718 was performed in order to investigate the microstructural and mechanical properties of the resulting friction stir welds, and the relationship between precipitation and mechanical properties was evaluated after conducting post-heat treatment.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural and mechanical properties of friction-stir-welded and post-heat-treated Inconel 718 alloy

Song

Nakata

2010

Journal of Alloys and Compounds

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“…3(b). These results are similar to those obtained previously with Inconel 600 and Inconel 625 [8,9]. The temperature hysteresis curve during the FSW is shown in Fig.…”

Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructural and mechanical properties of friction-stir-welded and post-heat-treated Inconel 718 alloy

Song

Nakata

2010

Journal of Alloys and Compounds

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“…Os revestimento por soldagem para proteção contra corrosão vem sendo bastante abordada nos últimos anos, utilizando-se aços inoxidáveis e as superligas de níquel, Inconel 625, como metal de adição para revestirem componentes e equipamentos da indústria do petróleo e gás natural. Apesar da aplicação da liga Inconel 625 por soldagem ser uma alternativa desejável, em função da liga apresentar elevada resistência em alta temperatura, boa soldabilidade,resistência à fluência, resistência à fadiga e excelente resistência à corrosão e oxidação em ambientes agressivoso custo da mesma é bastante elevada, sendo necessário que seja realizado um planejamento de estudos do processo para aplicação da liga (17,18) . A otimização experimental de processos de soldagem é bem lenta, devido aos vários parâmetros de processos envolvidos e a muitos eventos não lineares (19) .…”

Section: Introductionunclassified

Avaliação de Revestimentos à base de Inconel 625 depositados através do Processo de Soldagem GMAW em aço API 5L X70 utilizando Planejamento Fatorial

Santos

Maciel

Santana

2015

RBAV

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Concern for the environment has motivated several studies on the use of new materials to extend the life of equipment operating in harsh environments in the oil sector. One alternative that has been used is the application of coatings with high corrosion resistance welding process materials. The objective of this study was to evaluate the effects of different welding parameters on the geometric characteristics, dilution, microhardness, microstructure and corrosion resistance of the coatings with Inconel 625 alloy deposited on the API 5L X70 steel used in oil pipelines to transport plate. The parameters were optimized using the factorial statistical experimental design for analysis of process parameters, and the results analyzed by Response Surface Methodology (RSM). Three deposits were carried out ½ overwrite process GMAW (Gas Metal Arc Welding), followed by cross-sectional analysis of samples for the geometrical and metallographic characteristics. For the analysis corrosion, the coating surface being machined to have a height of 3 mm according to Standard N-1707 Petrobrás coating. The electrochemical behavior of the coating surface (Inconel 625) was investigated at room temperature in NaCl solution using the technique of linear potentiodynamic polarization and electrochemical impedance spectroscopy. To reveal the corrosion resistance of the coatings, featuring some important parameters were considered, such as: the polarization resistance (Rp) and the corrosion potential (Ecorr). The results showed dilution values D (%) ranging from 12.77% to 24.88% in the maximum levels (18.99 KJ/cm) and minimum (8.34 KJ/cm) welding power, and the amounts the most important of 12.77%. As to the corrosion resistance, the results were more satisfactory for the highest level of welding power.Keywords: GMAW; Coating; Corrosion. RESUMOA preocupação com o meio ambiente vem motivando diversas pesquisas sobre o uso de novos materiais para prolongar a vida útil de equipamentos que operam em ambientes agressivos no setor de petróleo. Uma das alternativas que vem sendo utilizada é a aplicação de revestimentos com materiais de alta resistência à corrosão por processo de soldagem. Objetivou-se neste estudo avaliar os efeitos dos diferentes parâmetros de soldagem sobre as características geométricas, diluição, microdureza, microestrutura e resistência à corrosão dos revestimentos com liga Inconel 625 depositados sobre chapa do aço API 5L X70 utilizado em dutos para transporte de petróleo. Os parâmetros foram otimizados utilizando o planejamento experimental fatorial completo para analise dos parâmetros de processo, sendo os resultados analisados pela Metodologia de Superfície de Resposta (MSR). Foram realizados três depósitos com sobreposição de ½ por processo de soldagem GMAW (Gas metal arc welding), seguido de corte transversal das amostras para a analise das caraterísticas geométricas e metalograficas. Para as analises de corrosão, as superfície do revestimento foram usinadas ficando com uma altura de 3 mm de acordo com a norma N...

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“…Recently, applications have been extended to high temperature materials such as stainless steel, titanium and nickel alloys [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution in friction stir welded API 5L-X52 steel

Gharibshahiyan¹,

Honarbakhsh-Raouf²,

Parvin³

2015

International Advanced Research Journal in Science, Engineering

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Welded API-5L steel pipes have been extensively used in the oil industry. One of the major parameters affecting the mechanical properties is the grain size, which is altered with the joining method. In this paper microstructural evolution in the friction stir welded API 5L-X52 steel pipes has been investigated.Specimens were cut from a 2mm thick API 5L-X52 steel pipe. The steel sheets were then joined by friction stir welding process; at a linear speed of 100 mm/min. The tool rotational speed was varied from 400 to 800 rpm. Samples were then evaluated using tensile test, metallographic and hardness measurements. Microstructural investigations revealed the stir zone, heat affected zone and thermo mechanically affected zones. Heat input in the stir zone led to the formation of elongated austenite grains which were transformed to fine ferrite and pearlite grains and widmanstatten ferrite in certain regions. Plastic deformation and recrystallization enhanced the hardness and tensile strength as well as toughness of the welded joint in the API 5L-X52 steel.

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Effect of precipitation on post-heat-treated Inconel 625 alloy after friction stir welding

Cited by 100 publications

References 6 publications

Microstructural and mechanical properties of friction-stir-welded and post-heat-treated Inconel 718 alloy

Microstructural and mechanical properties of friction-stir-welded and post-heat-treated Inconel 718 alloy

Avaliação de Revestimentos à base de Inconel 625 depositados através do Processo de Soldagem GMAW em aço API 5L X70 utilizando Planejamento Fatorial

Microstructural evolution in friction stir welded API 5L-X52 steel

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