Microstructural, mechanical and fractographical study of titanium-CP and Ti–6Al–4V similar brazing with Ti-based filler

Ganjeh, E.; Sarkhosh, Hadi

doi:10.1016/j.msea.2012.08.043

Cited by 55 publications

(12 citation statements)

References 24 publications

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“…Moreover, the nickel phosphide intermetallic was detected in the interfacial layer between copper and the brazed alloy for microwave and convention- ally brazed joints. The joint strength can be increased by lowering brittle intermetallic compound [18].…”

Section: Shear Strength and Fracture Behaviourmentioning

confidence: 99%

A novel method of brazing Cu/Cu‐7.0Ni‐9.3Sn‐6.3P/Cu using microwave hybrid heating

Maisarah

Yusof

Ramesh

et al. 2017

Materialwissenschaft Werkst

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Bulk copper and Cu‐7.0Ni‐9.3Sn‐6.3P (in wt %) filler alloys were brazed by microwave hybrid heating (MHH) and the results were compared with brazing using conventional furnace heating. Characterizations of the brazed joint were investigated through field emission scanning electron microscope, X‐ray diffraction, shear strength test and Vicker's microhardness test. It was observed that microwave heating decreased to 94 % of total processing time compared to conventional heating. Metallurgical study showed the formation of the alpha‐copper, copper phosphide and nickel phosphide intermetallics at the joint interface for both heating methods. The reaction layer thickness of microwave brazed joint was three times thinner compared to the conventionally brazed joint. The optimum shear strength of the microwave brazed joints was found to be 108.8 MPa while it was 16 % higher for the samples brazed using the conventional method. The failures of the microwave brazed joints showed a brittle cleavage structure while a mixed cleavage structure with tearing regions was observed for the conventionally brazed joints.

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Section: Shear Strength and Fracture Behaviourmentioning

confidence: 99%

A novel method of brazing Cu/Cu‐7.0Ni‐9.3Sn‐6.3P/Cu using microwave hybrid heating

Maisarah

Yusof

Ramesh

et al. 2017

Materialwissenschaft Werkst

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“…Fracturing actually started by crack initiation and propagation (mode I) until failure the sample (mode II) and is influenced by many factors like, alloying elements, porosity, microstructure and heat treatment. In this section, the former and later discussed comprehensively [30].…”

Section: Fractography Analysismentioning

confidence: 99%

Microstructural association between mechanical behavior with bending fracture surfaces in Astaloy CrA sintered parts alloyed by Cu and C

2014

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a b s t r a c tApplication of powder metallurgy technique, a method presenting both economic and technical concepts for producing sintered parts, has been expanding in automobile and other engineering industries. Powder metallurgy parts usually possess residual porosity in their microstructures deteriorating mechanical performance. There have been many solutions to increasing of strength in these parts such as applying different heat treatment or adding alloying elements. It is well known that Fe-Cu-C is the one of main alloying system for both increasing the strength and decreasing cost of them. In this study, the microstructure, mechanical properties (transverse rapture strength and hardness), crack behavior and fracture modes of a low alloy Fe-Cr powder (Astaloy CrA) with different amount of copper (0, 1 and 2 wt.%) and carbon, in form of graphite (0.45, 0.6 and 0.8 wt.%) sintered at conventional condition have been investigated. Microstructural evolution showed adding copper and graphite as alloying elements could generate widespread of strength (857-1380 MPa) and hardness . Developing different phases in microstructure was the main reason for various mechanical properties. Crack coalescence phenomenon leads to fracturing with ductile (at sinter-necks) and brittle morphology. Micro-mechanism of fracture related to transparticle and interparticle crack propagation.

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“…Many techniques for joining titanium have been previously employed, such as welding (Ref 21), brazing (Ref [20][21][22], or diffusion bonding ( Ref 23). The conventional fusion welding techniques may result in the segregation of chemical species, stress concentration, and the formation of thick intermetallic compounds (IMC).…”

Section: Introductionmentioning

confidence: 99%

Interfacial Microstructure Evolution and Shear Strength of Titanium Sandwich Structures Fabricated by Brazing

Wang

Fan

et al. 2016

J. of Materi Eng and Perform

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The corrugated sandwich structure, consisting of a CP Ti (commercially pure titanium) core between two Ti-6Al-4V face sheets, was brazed using pasty Ti-37.5Zr-15Cu-10Ni as filler alloy, at the temperature of 870°C for 5, 10, 20, and 30 min. The effect of brazing time on the microstructure and elemental distribution of the brazed joints was examined by means of SEM, EDS, and XRD analyses. It was found that various intermetallic phases were formed in the brazed joints, following a brazing time of 5 min, and their contents were decreased by the increment of brazing time, while prolonged brazing time resulted in a fine, acicular Widmanstätten microstructure throughout the entire joint. In addition, shear testing was performed in the brazed corrugated specimens in order to indirectly assess the quality of the joints. The debonding between CP Ti and Ti-6Al-4V was observed in the specimen brazed for 5 min and the fracture of the CP Ti corrugated core occurred after 30 min of brazing time. Additionally, when brazed for 10 min or 20 min, brittle intermetallic compounds in the joints and the grain growth of the base metal were controllable. Therefore, the sandwich structures failed without debonding in the joints or fracture within the base metal, demonstrating a good combination of strength and ductility.

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Microstructural, mechanical and fractographical study of titanium-CP and Ti–6Al–4V similar brazing with Ti-based filler

Cited by 55 publications

References 24 publications

A novel method of brazing Cu/Cu‐7.0Ni‐9.3Sn‐6.3P/Cu using microwave hybrid heating

A novel method of brazing Cu/Cu‐7.0Ni‐9.3Sn‐6.3P/Cu using microwave hybrid heating

Microstructural association between mechanical behavior with bending fracture surfaces in Astaloy CrA sintered parts alloyed by Cu and C

Interfacial Microstructure Evolution and Shear Strength of Titanium Sandwich Structures Fabricated by Brazing

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