Narrow gap multi-pass laser butt welding of explosion welded CP-Ti/Q235B bimetallic sheet by using a copper interlayer

Ning, Jie; Zhang, Linjie; Jiang, Gui-chuan; Xie, Miaoxia; Yin, Xianqing; Zhang, Jianxun

doi:10.1016/j.jallcom.2017.01.129

Cited by 50 publications

(15 citation statements)

References 35 publications

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“…In order to solve these problems, many welding methods have been practiced to investigate the joining between titanium alloys and stainless steels, mainly including brazing welding [7,[16][17][18][19][20], laser welding [2,5,6,[21][22][23][24][25], electronbeam welding [26][27][28][29][30][31], diffusion bonding [32][33][34][35][36], explosive welding [37][38][39][40], and friction stir welding [41][42][43][44][45][46][47]. Cu-based and Ag-based fillers were usually used to braze titanium/steel joints, while scattered brittle intermetallics, such as (Fe,Cu)Ti, Cu 4 Ti 3 , and CuTi [20,48] and Cu 4 Ti and CuTi 2 [7], were induced to the interfaces which were detrimental to the mechanical properties of the joints, and maximum possible tensile strength of the joints was found to be no more than 200 MPa [16][17][18][19][20]…”

Section: Introductionmentioning

confidence: 99%

A Review on Diffusion Bonding between Titanium Alloys and Stainless Steels

Song

Fang

et al. 2018

Advances in Materials Science and Engineering

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High-quality joints between titanium alloys and stainless steels have found applications for nuclear, petrochemical, cryogenic, and aerospace industries due to their relatively low cost, lightweight, high corrosion resistance, and appreciable mechanical properties.is article reviews diffusion bonding between titanium alloys and stainless steels with or without interlayers. For diffusion bonding of a titanium alloy and a stainless steel without an interlayer, the optimized temperature is in the range of 800-950°C for a period of 60-120 min. Sound joint can be obtained, but brittle FeTi and Fe-Cr-Ti phases are formed at the interface. e development process of a joint mainly includes three steps: matching surface closure, growth of brittle intermetallic compounds, and formation of the Kirkendall voids. Growth kinetics of interfacial phases needs further clarification in terms of growth velocity of the reacting layer, moving speed of the phase interface, and the order for a new phase appears. e influence of Cu, Ni (or nickel alloy), and Ag interlayers on the microstructures and mechanical properties of the joints is systematically summarized. e content of FeTi and Fe-Cr-Ti phases at the interface can be declined significantly by the addition of an interlayer. Application of multi-interlayer well prevents the formation of intermetallic phases by forming solid solution at the interface, and parameters can be predicted by using a parabolic diffusion law. e selection of multi-interlayer was done based on two principles: no formation of brittle intermetallic phases and transitional physical properties between titanium alloy and stainless steel.

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Section: Introductionmentioning

confidence: 99%

A Review on Diffusion Bonding between Titanium Alloys and Stainless Steels

Song

Fang

et al. 2018

Advances in Materials Science and Engineering

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“…Besides, from the microstructure image, some cracks formed due to large deformation and pores defects also occurred in the welded joint. The thermal expansion coefficient and thermal conductivity of copper were significantly higher than those of the steel [23]. Hence, during the welding process, the large misfit strain and the residual stresses will be inevitably generated in the joint, leading to the solidification cracking.…”

Section: Resultsmentioning

confidence: 99%

Weld Formation Mechanism and Microstructural Evolution of TC4/304 Stainless Steel Joint with Cu-Based Filler Wire and Preheating

Liu

Zhen

et al. 2019

Materials

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Ti-Fe intermetallic compounds were effectively suppressed with Cu-based filler wire and weld formation was greatly improved with the preheating of substrates when joining TC4 titanium alloy and 304 stainless steel. A Ti/Cu transition zone consisting of complex TiCu, Ti2Cu3, TiFe, and TiFe2 phases was formed between Cu-weld/TC4 interface, while Cu-weld/304ss interface was mainly composed of α-Fe and ε-Cu solid solution. At lower heat input, the undercut defect in back surface had potential to cause crack initiation and joint fracture. Though increasing heat input would improve weld morphology, the formation of thick interfacial reaction layer and weld cracking led to low weld quality and joint strength. The preheating of substrates had an obvious effect on wetting ability of liquid filler metal and could achieve a better weld quality at lower heat input. The back formation of weld was improved to decrease the occurrence of weld defects. The highest tensile strength of 365 MPa occurred at welding heat input of 0.483 kJ/cm, increasing by 47% compared to the joint without preheating. The interfacial reaction mechanism was discussed to reveal the relationship between microstructural characteristics and fracture behavior of Ti/steel welded joints with Cu-based filler wire.

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“…The microstructural analysis highlighted the coarse columnar crystal formed in the melted zone near the interface of base materials. Ning et al 26 examined the laser butt welded Ti-Steel bimetallic joint by using a copper interlayer. The purpose of the interlayer was to reduce the transition zone between base materials.…”

Section: Introductionmentioning

confidence: 99%

Combining CaO–SiO₂–TiO₂and CaO–SiO₂–Al₂O₃ternary phase systems for design of bimetallic welds

Bhandari¹,

Chhibber

Sharma

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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The bimetallic welds are frequently utilized for pipeline transport system of the nuclear power plants. The occurrences of welding defects generally depend on the filler electrode as well as the electrode coatings during shielded metal arc welding process. This study involves the design of austenitic stainless steel welding electrodes for SS304L–SA516 bimetallic welds. The objective of research work includes the novel design of Al2O3–TiO2–CaO–SiO2 coatings by combining two ternary phase systems using extreme vertices mixture design methodology to analyze the effect of key coating constituents on the weld metal chemistry and mechanical properties of the welds. The significant effect of electrode coating constituent CaO on weld metal manganese content is observed which further improves the toughness of bimetallic weld joints. Various regression models have been developed for the weld responses and multi objective optimisation approach using composite desirability function has been adopted for identifying the optimized set of electrode coating compositions. The role of delta ferrite content in promoting the favourable solidification mode has been studied through microstructural examination.

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Narrow gap multi-pass laser butt welding of explosion welded CP-Ti/Q235B bimetallic sheet by using a copper interlayer

Cited by 50 publications

References 35 publications

A Review on Diffusion Bonding between Titanium Alloys and Stainless Steels

A Review on Diffusion Bonding between Titanium Alloys and Stainless Steels

Weld Formation Mechanism and Microstructural Evolution of TC4/304 Stainless Steel Joint with Cu-Based Filler Wire and Preheating

Combining CaO–SiO₂–TiO₂and CaO–SiO₂–Al₂O₃ternary phase systems for design of bimetallic welds

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Narrow gap multi-pass laser butt welding of explosion welded CP-Ti/Q235B bimetallic sheet by using a copper interlayer

Cited by 50 publications

References 35 publications

A Review on Diffusion Bonding between Titanium Alloys and Stainless Steels

A Review on Diffusion Bonding between Titanium Alloys and Stainless Steels

Weld Formation Mechanism and Microstructural Evolution of TC4/304 Stainless Steel Joint with Cu-Based Filler Wire and Preheating

Combining CaO–SiO2–TiO2and CaO–SiO2–Al2O3ternary phase systems for design of bimetallic welds

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Combining CaO–SiO₂–TiO₂and CaO–SiO₂–Al₂O₃ternary phase systems for design of bimetallic welds