Influence of high temperature diffusion bonding process parameters on mechanical and metallurgical characteristics of nickel superalloy to martensitic stainless steel

2019 ◽  
Vol 83 (3) ◽  
pp. 318-328
Author(s):  
Arulsamy Arun Negemiya ◽  
Selvarajan Rajakumar ◽  
Visvalingam Balasubramanian
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Process Parameters ◽  
Diffusion Bonding ◽  
Martensitic Stainless Steel ◽  
Nickel Superalloy ◽  
Bonding Process ◽  
Temperature Diffusion

Feasibility Study on Optimisation of Material Selection for High Temperature Sour Gas Producer

2021 ◽  
Author(s):  
M. Helmi Nordin ◽  
M. Wahidullah Moh Wahi ◽  
Amresh Sashidharan ◽  
Nurfuzaini A. Karim ◽  
Alif Syahrizad Ramli
Keyword(s):  
Weight Loss ◽  
Stainless Steel ◽  
High Temperature ◽  
Corrosion Rate ◽  
Stress Corrosion Cracking ◽  
Martensitic Stainless Steel ◽  
Material Selection ◽  
Working Temperature ◽  
Fit For Purpose ◽  
Selection For

Abstract K field is a green field in East Malaysia with prolific gas reserves that is being developed with six high rate gas producing wells from high temperature (190 °C) carbonate reservoir. Tubular material feasibility study is one of the key subjects of scrutiny when it comes to completing wells in high temperature environment coupled with existence of significant level of H2S and CO2 contents. Material testing was conducted at the specified test environments (102 bar CO2 + 120ppm H2S) and load cases to assess susceptibility of Martensitic Stainless Steel to Stress Corrosion Cracking (SCC), corrosion rate and compatibility with completion brine. The aim was to optimize the material selection that is fit for purpose (lower completion and flow-wetted area of production casing) and reduce well cost up to USD 2.5 million. The base case of material selection for flow-wetted section is 17CR110 ksi, which meets the design requirements of these wells based on fit for purpose test conducted in the data base. Flow-wetted section in this case is production liner and flow-wetted section of production casing below production packer. Super 13CR -110 ksi and 15CR125 ksi material grades were considered for design optimization for this section of interest. Four Point Bend Method was used for SCC test sets while weight loss method for corrosion rate measurement. For brine compatibility test, calcium bromide (without additive) was used as test solution for 17CR 110 ksi, 15CR 125 ksi and Super 13CR -110 ksi with elevated temperature of 190 °C. Post-test assessment was conducted by visual examination by stereomicroscope to check for surface indication and dye-penetrant examination to determine any indication of cracks. It was observed that the Super 13CR -110 ksi and 15CR 125 ksi test specimens survived the test with no pitting observed. Meanwhile, test specimens were weighed to determine corrosion rates, resulted to Super 13CR -110 ksi sample having an average corrosion rate of 0.2195 mm/year. This translates to less than 30% weight loss throughout well production life and therefore accepted for open-hole production liner and production casing flow-wetted section. Key enabler in this design optimization effort is the understanding of the Stress Corrosion Cracking for martensitic stainless steel in high temperature sour environment where commonly, martensitic stainless steel (Super 13Cr / Modified Super 13Cr) working temperature is 165 °C. The test manages to extend the working temperature up to 190 °C.

NDE Inspections and Simulation of Defects in Composite-Sintered Bushes

2013 ◽  
Vol 650 ◽  
pp. 582-587
Author(s):  
Kwang Hee Im ◽  
Ki Youl Kim ◽  
Ki Taek Shin ◽  
Han Hee Lee ◽  
To Kang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Carrying Capacity ◽  
Diffusion Bonding ◽  
Manufacturing Process ◽  
High Load ◽  
Load Carrying Capacity ◽  
Heavy Duty ◽  
Temperature Diffusion ◽  
Load Carrying

Bush is one of machine and automobile parts like brake used in drums and hubs in particular. Such bush parts are used for bearings of heavy-duty, large cars requiring wear resistance and high load carrying capacity. High temperature diffusion bonding has been applied for holding the both materials of the bushing together, which are outer steel materials and inner composite-sintered bushings. Therefore, it is very important evaluate the bonding integrity in manufacturing process. A simulation has been performed in order to evaluate the maximum defect sizes. Also, ultrasonic C-scan tests were performed for finding the defect in the composite-sintered bushings with the size of inherent flaws.

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