scholarly journals Bond strength and metallurgical analysis of stainless steel-aluminum bimetallic castings with Ni interlayer using thermocol mould

2021 ◽  
Author(s):  
Raja V ◽  
Kavitha M
Keyword(s):  
Stainless Steel ◽  
Bond Strength ◽  
Metallurgical Analysis ◽  
Ni Interlayer

scholarly journals Comparative Evaluation of the Shear Bond Strength and Debonding Properties of a Conventional Composite and Flowable Composites used for Orthodontic Bracket Bonding

2013 ◽  
Vol 4 (1) ◽  
pp. 6-16 ◽  
Author(s):  
BM Shivalinga ◽  
S Pradeep ◽  
Ravi Shanthraj ◽  
H Jyothi Kiran
Keyword(s):  
Stainless Steel ◽  
Bond Strength ◽  
Comparative Evaluation ◽  
Shear Bond Strength ◽  
Orthodontic Bracket ◽  
Group Iii ◽  
Flowable Composite ◽  
Group I ◽  
Adhesive Remnant Index ◽  
Flowable Composites

ABSTRACT Aim To evaluate and compare shear bond strength (SBS) and debonding characters of the Transbond XT (BisGMA-based composite), Esthet-X flow (flowable composite), Filtek Z-350 (flowable composite). Materials and methods A total of 90 human premolars were divided into group I, Transbond XT (n = 30); group II, Esthet-X flow (n = 30) and group III, Filtek Z-350 (n = 30), the preadjusted edgewise stainless steel premolar brackets were bonded to evaluate the shear bond and debonding properties. Results The results of the statistical analysis comparing the three groups indicated no statistically significant differences between the groups. In general, the SBS with groups I and III exhibited similar bond strength with 11.58 ± 1.3 MPa and 11.07 ± 1.0 MPa respectively. Groups III exhibited least bond strength of 10.7 ± 2 MPa. In modified adhesive remnant index (ARI) the majority of bond failures occurred at enamel-adhesive interface or cohesive type failure in all the three groups. Groups II and III showed increased frequency of score 2, 4 and 5 compared to group I which showed increased frequency of score 0 and 1. Conclusion When considering the SBS and ARI scores obtained, flowable composites can be effectively applied to orthodontic bracket bonding. How to cite this article Pradeep S, Shanthraj R, Kiran HJ, Shivalinga BM. Comparative Evaluation of the Shear Bond Strength and Debonding Properties of a Conventional Composite and Flowable Composites used for Orthodontic Bracket Bonding. World J Dent 2013;4(1):6-16.

Comparison of Nickel Nanoparticle-Assisted Diffusion Brazing of Stainless Steel to Conventional Diffusion Brazing and Bonding Processes

2010 ◽  
Vol 132 (3) ◽  
Author(s):  
S. K. Tiwari ◽  
B. K. Paul
Keyword(s):  
Stainless Steel ◽  
Bond Strength ◽  
Diffusion Bonding ◽  
Transient Liquid Phase ◽  
Bond Line ◽  
Scanning Electron Micrographs ◽  
Secondary Phases ◽  
Bonding Pressure ◽  
Nickel Nanoparticle ◽  
Diffusion Brazing

Transient liquid phase diffusion brazing is used in precision, hermetic joining applications as a replacement for diffusion bonding to reduce cycle times, reduce bonding pressure, and improve yields. In the present study, stainless steel 316L laminae are diffusion brazed with an interlayer of nickel nanoparticles and compared with samples joined by conventional diffusion bonding and electroplated nickel-phosphorous diffusion brazing. Comparison is made with regard to microstructural evolution, diffusional profile, and bond strength. All bonding was carried out in a uni-axial vacuum hot press at 1000°C with a heating rate of 10°C/min, a dwell time of 2 h and a bonding pressure of 10 MPa. Bond strength measurements show that the sample brazed with a nickel nanoparticle interlayer has the lowest void fraction at 4.8±0.9% and highest shear strength at 141.3±7.0 MPa. Wavelength dispersive spectroscopic analysis of sample cross-sections shows substantial diffusion of Ni and Fe across the nickel nanoparticle bond line. Scanning electron micrographs show no secondary phases along the nickel nanoparticle bond line.

Fatigue Failure of Hydroformed AISI 316L Stainless Steel Bellows

2015 ◽  
Vol 830-831 ◽  
pp. 713-716
Author(s):  
Sushant Manwatkar ◽  
S.V.S. Narayana Murty ◽  
P. Ramesh Narayanan
Keyword(s):  
Stainless Steel ◽  
Low Temperatures ◽  
316L Stainless Steel ◽  
Launch Vehicles ◽  
Aisi 316L ◽  
Aisi 316L Stainless Steel ◽  
Metallurgical Analysis ◽  
Steel Aisi ◽  
Inner Diameter ◽  
Stainless Steel Aisi

Austenitic stainless steel AISI 316L is used for components of cryogenic engine in satellite launch vehicles due to its better mechanical properties at low temperatures. In one such application, AISI 316L stainless steel bellows are used in electro-pneumatic command valve of a cryogenic engine. This valve employs a hydro-formed bellow of 0.14mm thickness as an actuator element. When one of the electro-pneumatic command valve was vibrated without pressure, crack was noticed at the inner diameter of the bellow. Detailed metallurgical analysis indicated that the cracking to be due to fatigue.

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