Transient liquid-phase bonding of T91 steel pipes using amorphous foil

Chen, S.J.; Tang, Hu-dan; Xiao, Jing

doi:10.1016/j.msea.2007.11.133

Cited by 16 publications

(5 citation statements)

References 5 publications

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“…The bonding process is usually confined in a vacuum [3-5, 7, 12, 14-17, 20-30, 35, 38-40, 46-58, 61-63, 65, 66, 68-72, 76-83, 86-88, 93-100, 103-105, 108, 110, 112-115, 117, 119, 122-127, 130, 132-138, 140-157], although an inert atmosphere, such as argon, can be used [6,11,14,32,33,43,45,60,67,74,75,90,111,121,134,158,159]. On rare occasions, TLP bonding is performed under a different atmosphere, such as nitrogen [44], hydrogen [160], nitrogen and hydrogen [18], or open air [129].…”

Section: Tlp Bonding Processmentioning

confidence: 99%

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Overview of transient liquid phase and partial transient liquid phase bonding

2011

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Transient liquid phase (TLP) bonding is a relatively new bonding process that joins materials using an interlayer. On heating, the interlayer melts and the interlayer element (or a constituent of an alloy interlayer) diffuses into the substrate materials, causing isothermal solidification. The result of this process is a bond that has a higher melting point than the bonding temperature. This bonding process has found many applications, most notably the joining and repair of Ni-based superalloy components. This article reviews important aspects of TLP bonding, such as kinetics of the process, experimental details (bonding time, interlayer thickness and format, and optimal bonding temperature), and advantages and disadvantages of the process. A wide range of materials that TLP bonding has been applied to is also presented. Partial transient liquid phase (PTLP) bonding is a variant of TLP bonding that is typically used to join ceramics. PTLP bonding requires an interlayer composed of multiple layers; the most common bond setup consists of a thick refractory core sandwiched by thin, lower-melting layers on each side. This article explains how the experimental details and bonding kinetics of PTLP bonding differ from TLP bonding. Also, a range of materials that have been joined by PTLP bonding is presented.

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Section: Tlp Bonding Processmentioning

confidence: 99%

“…As the temperature is increased, the rate of diffusion increases exponentially. In addition, intermetallic regions, which tend to slow down the rate of diffusion [60,110], can often be avoided by raising the temperature. As shown in Fig.…”

Section: Optimal Bonding Temperaturementioning

confidence: 99%

Overview of transient liquid phase and partial transient liquid phase bonding

2011

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“…Efforts to prevent the formation of deleterious microconstituents that degrade joints produced by brazing technique have resulted in the development of transient liquid phase (TLP) bonding, also known as diffusion brazing [1][2][3][4][5][6], which can be used for joining advanced materials that are extremely difficult to process by conventional welding methods. The TLP bonding process involves the use pre-placed insert alloy of a specific composition and with a melting point lower than that of the base alloy, between the two surfaces to be joined, and the entire assembly is heated to the bonding temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of non-planar geometry on diffusion kinetics during brazing repair process

Ghanbar

Ojo

2020

Materials Science and Technology

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A new finite difference numerical model is used to study the influence of non-planar (cylindrical and spherical) solid–liquid interface geometry on the kinetics of isothermal solidification during diffusion brazing or transient liquid phase repair process. Notwithstanding that limited work had been reported on non-planar systems, this study shows that non-planarity of the solid–liquid interface can have significant effects on the kinetics of solid–liquid phase transformation during the repair process, which are crucial to the understanding and optimisation of the repair process in non-planar systems.

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“…TLPB was also applied in other types of steel tubular products. Amorphous foils of the Fe-Ni-Cr-Si-B system were used as interlayers for bonding hot-rolled seamless pipes for boilers [11] and drill pipes [12]. The obtained joints outmatched the tensile strength of the base metals and were successfully bend tested -the latter being fundamental to quantify the ductility of the joint.…”

Section: Introductionmentioning

confidence: 99%

Transient liquid phase bonding of carbon steel components using Ni-based foils – A comprehensive joint characterization

Luozzo

Boudard

Fontana

2019

Materials Science and Engineering: A

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The transient liquid phase bonding (TLPB) process is one of the selected joining technologies to replace threaded connections in solid expandable tubulars. In particular, for expandable hot-rolled seamless carbon steel tubular products using Ni-based amorphous metallic foils as filler material. In this work, a comprehensive mechanical properties and microstructural characterization was carried out in TLP-bonded bars for this base metal/filler material combination. Both the joint and the heat affected zone exhibited a strength which compares well with the base metal, and a ductility in accordance with that which is typically specified for steel arc-welded joints. A coalesced lath-like bainitic microstructure was found at the joint. In addition, and by means of orientation imaging, a parent austenite grain-which is shared by the joint and an adjacent ferrite grain from the base metal-was found, which demonstrates the epitaxial nature of the TLPB solidification process. Also, a cell-block-like structure at ferrite grains next to the joint was detected, due to the plastic deformation developed in tensile-tested samples at room temperature.

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Transient liquid-phase bonding of T91 steel pipes using amorphous foil

Cited by 16 publications

References 5 publications

Overview of transient liquid phase and partial transient liquid phase bonding

Overview of transient liquid phase and partial transient liquid phase bonding

Effect of non-planar geometry on diffusion kinetics during brazing repair process

Transient liquid phase bonding of carbon steel components using Ni-based foils – A comprehensive joint characterization

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