scholarly journals Microstructural characterisation of thick-walled wire arc additively manufactured stainless steel

2021 ◽  
pp. 117373
Author(s):  
L. Palmeira Belotti ◽  
J.A.W. van Dommelen ◽  
M.G.D. Geers ◽  
C. Goulas ◽  
W. Ya ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Microstructural Characterisation

Microstructural characterisation of a dissimilar weld of alloy D9 and AISI 316M stainless steel produced using a 2.5 kW CW CO 2 laser

2002 ◽  
Vol 12 (2) ◽  
pp. 117-133 ◽  
Author(s):  
Rakesh Kaul ◽  
P. Ganesh ◽  
M.O. Ittoop ◽  
A.K. Nath ◽  
Aniruddha Kumar ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Dissimilar Weld ◽  
Microstructural Characterisation ◽  
Alloy D9

Microwave Induced Plasma (MIP) Brazing of Silicon Nitride to Stainless Steel

1996 ◽  
Vol 430 ◽  
Author(s):  
M. Samandi ◽  
M. Bate ◽  
R. Donnan ◽  
S. Miyake
Keyword(s):  
Stainless Steel ◽  
Silicon Nitride ◽  
Heating Rate ◽  
Microwave Plasma ◽  
Fast Heating ◽  
Reactive Metal ◽  
Microwave Induced Plasma ◽  
Microstructural Characterisation ◽  
Joint Quality ◽  
Unique Capability

AbstractIn an attempt to accelerate the process of joining of metals to ceramics, a new rapid brazing technology has been developed. In this process, referred to as Microwave Induced Plasma (MIP) brazing, a microwave plasma is used to rapidly heat the ceramic and metal to the melting temperature of the reactive braze material. The heating rate obtained by MIP could be many times faster than those achieved by conventional resistive heating in a tube furnace. The fast heating rate has no detrimental effect on the joint quality and in fact results in the formation of a thick interfacial film suggesting significant interdiffusion between the braze and ceramic, possibly stimulated by the microwave radiation. In this paper the experimental arrangement of the MIP system is described. The unique capability of the MIP heating is demonstrated by successful joining of hot pressed silicon nitride to stainless steel using reactive metal brazing. The results of microstructural characterisation of the joints carried out by SEM and EDS will also be presented.

Microstructural Characterisation of Copper-Stainless Steel Brazed Joint with Copper Based Filler Metal

2012 ◽  
Vol 710 ◽  
pp. 650-655 ◽  
Author(s):  
M. Swathi Kiranmayee ◽  
Abhay Kumar Jha ◽  
Sushant K. Manwatkar ◽  
D.P. Sudhakar ◽  
P. Ramesh Narayanan ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Shear Strength ◽  
Elevated Temperatures ◽  
Filler Metal ◽  
High Vacuum ◽  
Thrust Chamber ◽  
Indian Space Programme ◽  
Elemental Diffusion ◽  
Brazed Joint ◽  
Microstructural Characterisation

Copper to stainless steel brazed components are used in the thrust chamber of cryogenic propulsion system of Indian Space Programme. Temperature and time play a major role in the optimization of brazing cycle. An effort has been made to study the influence of the above parameters and correlate with the microstructure and shear strength achieved. In the present work, brazing was performed using Cu based filler metal. Temperature selected was within the range of 1010-1045 °C for two different time durations (20 minutes and 30 minutes) under high vacuum (10-5 Torr). Extensive scanning electron microscopy with energy dispersive spectrometry was carried out to understand the kinetics of elemental diffusion and phase formation at and near the brazed joint. Microhardness was evaluated across the joints to facilitate further understanding of the joint chemistry. The optimized shear strength of the joints was as high as 155 MPa for the joint brazed at 1030 °C for 30 minutes against the required strength of 150 MPa. The joint could retain strength at cryo temperature and meet the minimum expected value of 320 MPa. At the same time, it exhibited good mechanical properties at elevated temperatures. This paper brings out details of the investigation carried out.

Microstructural characterisation of stainless steel-titanium interfaces in diffusion bonded joints

2015 ◽  
Author(s):  
V. Srikanth ◽  
A. Laik ◽  
B. Vishwanadh ◽  
A. A. Shirzadi ◽  
G. K. Dey
Keyword(s):  
Stainless Steel ◽  
Bonded Joints ◽  
Microstructural Characterisation

NiAl precipitation in Fe-12w/o Cr-5w/o Ni-4w/o Al

1983 ◽  
Vol 41 ◽  
pp. 202-203
Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Chromium Content ◽  
Scale Up ◽  
Optical Metallography ◽  
Property Evaluation ◽  
310 Stainless Steel ◽  
Microstructural Studies

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.

Comparison of Recovery and Recrystallization in Stainless Steel Following Plane-Wave Shock Loading and Explosive Forming

1970 ◽  
Vol 28 ◽  
pp. 428-429 ◽  
Author(s):  
J. A. Korbonski ◽  
L. E. Murr
Keyword(s):  
Stainless Steel ◽  
Shock Loading ◽  
Pressure Pulse ◽  
Shock Pressure ◽  
304 Stainless Steel ◽  
Strain Rates ◽  
Two Dimensional ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Explosive Forming

Comparison of recovery rates in materials deformed by a unidimensional and two dimensional strains at strain rates in excess of 104 sec.−1 was performed on AISI 304 Stainless Steel. A number of unidirectionally strained foil samples were deformed by shock waves at graduated pressure levels as described by Murr and Grace. The two dimensionally strained foil samples were obtained from radially expanded cylinders by a constant shock pressure pulse and graduated strain as described by Foitz, et al.

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