Diffusion bonded transition joints of titanium to stainless steel with improved properties

Ghosh, Manojit; Chatterjee, S.

doi:10.1016/s0921-5093(03)00298-3

Cited by 113 publications

(62 citation statements)

References 13 publications

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“…11,16) With a further rise in bonding temperature to 950°C and above, the coalescence of mating surfaces increases. However, Fe 2 NbϩFe 7 Nb 6 intermetallics phase mixture is formed at the SS-Nb interface and their thickness increases with the increase in bonding temperature.…”

Section: Mechanical Properties Of the Diffusion Bondedmentioning

confidence: 99%

Evolution of Interface Microstructure and Mechanical Properties of Titanium/304 Stainless Steel Diffusion Bonded Joint Using Nb Interlayer

Kundu

Chatterjee

2010

ISIJ Int.

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In the present investigation, the evolution of interface microstructure and mechanical properties of diffusion bonded joints of titanium to Type 304 stainless steel with a niobium interlayer were studied. The joints were processed in the temperature range of 800 to 1 000°C for 0.5 h in vacuum. The stainless steel/niobium interface was free from intermetallic phase up to 900°C; however, Fe 2 NbϩFe 7 Nb 6 phase mixture was observed at and above a processing temperature of 950°C. The niobium/titanium interface was free from intermetallic compounds at all processing temperatures. A maximum tensile strength of 297 MPa (ϳ93 % of Ti) and shear strength of 217 MPa (ϳ75 % of Ti) along with a 6.9 % ductility were achieved, when processed at 900°C processing temperature. The failure of bonded samples took place through the stainless steel-niobium interface at all processing temperatures during loading.KEY WORDS: diffusion bonding; niobium interlayer; electron probe microanalyser; scanning electron microscope; X-ray diffraction.

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Section: Mechanical Properties Of the Diffusion Bondedmentioning

confidence: 99%

Evolution of Interface Microstructure and Mechanical Properties of Titanium/304 Stainless Steel Diffusion Bonded Joint Using Nb Interlayer

Kundu

Chatterjee

2010

ISIJ Int.

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“…In recent years, considerable interest has been given to titanium and its alloys because of its unique properties such as high strength, toughness, erosion resistance and low thermal conductivity and density [1,2]. Nuclear, chemical, aerospace and space industries strongly demand dissimilar joints of titanium and titanium alloys to austenitic stainless steel due to good corrosion resistance and satisfactory mechanical behavior [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of brazing temperature on microstructure and mechanical properties of dissimilar joints of titanium/stainless steel joint brazed by Al interlayer

Szwed¹,

Konieczny²

2017

Przegląd Spawalnictwa

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Wpływ temperatury spajania na mikrostrukturę oraz właściwości mechaniczne połączeń tytan/stal nierdzewna wykonanych przy użyciu aluminium mgr inż. Bartłomiej Szwed, dr hab. inż. Marek Konieczny -Kielce University of Technology.Autor korespondencyjny/Corresponding author: bartlomiej_szwed@o2.pl StreszczenieLutowanie dyfuzyjne zostało wykonane pomiędzy tytanem (Grade 2) a stalą nierdzewna (X5CrNi18-10) z wykorzystaniem foli aluminiowej o grubości 100 μm. Lutowanie zostało przeprowadzone w temperaturach od 550 do 700 °C w czasie 60 minut pod dociskiem 2 MPa w próżni. Wpływ temperatury na mikrostrukturę połączenia został przebadany na mikroskopie optycznym oraz elektronowym mikroskopie skaningowym wyposażonym w mikroanalizator rentgenowski (EDS). Na granicy stali nierdzewnej z aluminium wydzieliły się warstwy faz FeAl3 oraz Fe2Al5. Struktura załącza od strony tytanu składała się oraz warstw faz międzymetalicz-nych TiAl, TiAl2, TiAl3. Grubość warstw reakcyjnych rosła wraz ze wzrostem temperatury lutowania. Najwyższą wytrzymałość (91 MPa) uzyskano podczas testów ścinania technologicznego połączeń lutowanych w temperaturze 600 °C.Słowa kluczowe: lutowanie dyfuzyjne; tytan; stal nierdzewna; mikrostruktura; właściwości mechaniczne AbstractIn present investigation diffusion brazed joints between titanium (Grade 2) and stainless steel (X5CrNi18-10) using 100 μm thick aluminum foil as a filler metal were produced at the temperature range from 550 to 700 °C for 60 minutes under 2 MPa bonding pressure in vacuum. The effect of temperature on the microstructure was investigated using light optical microscopy and scanning electron microscopy equipped with an energy dispersive X-ray system (EDS) to determine chemical composition of joint. The FeAl3 and Fe2Al5 intermetallic layers were observed at the stainless steel-aluminum interfaces. At the aluminum-titanium interfaces TiAl, TiAl2, TiAl3 intermetallic layers were identified. The thickness of the reaction products increases with increase in the joining temperature. The highest shear strength (91 MPa) was achieved for samples prepared at 600 °C.

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“…Such types of joints have applications in aerospace, chemical and nuclear industries [1][2][3][4]. Conventional fusion welding is not a feasible technique to join these materials due to the different problems like formation of stress concentration at the bond interface and development of chemical heterogeneities [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Joints of Titanium with Stainless Steel Performed using Nickel Filler

Szwed¹,

Konieczny²

2016

Archives of Metallurgy and Materials

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Diffusion brazing was performed between titanium (Grade 2) and stainless steel (X5CrNi18-10) using as a filler a nickel foil at the temperatures of 850, 900, 950 and 1000°C. The microstructure was investigated using light microscopy and scanning electron microscopy equipped with an energy dispersive X-ray system (EDS). The structure of the joints on the titanium side was composed of the eutectoid mixture αTi+Ti 2 Ni and layers of intermetallic phases Ti 2 Ni, TiNi and TiNi 3 . The stainless steel-nickel interface is free from any reaction layer at 850°C, above this temperature thin layer of reaction appears. The microhardness measured across the joints reaches higher values than for titanium and stainless steel, and it achieves value from 260 to 446 HV. The highest shear strength (214 MPa) was achieved for joints brazed at 900°C.

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Diffusion bonded transition joints of titanium to stainless steel with improved properties

Cited by 113 publications

References 13 publications

Evolution of Interface Microstructure and Mechanical Properties of Titanium/304 Stainless Steel Diffusion Bonded Joint Using Nb Interlayer

Evolution of Interface Microstructure and Mechanical Properties of Titanium/304 Stainless Steel Diffusion Bonded Joint Using Nb Interlayer

Effect of brazing temperature on microstructure and mechanical properties of dissimilar joints of titanium/stainless steel joint brazed by Al interlayer

Microstructure and Mechanical Properties of Joints of Titanium with Stainless Steel Performed using Nickel Filler

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