Failure analysis of SS 304 HCu reheater tube of a supercritical power plant

Gokhale, Aditya; Varma, Anand; Singh, Chetan; Halder, Prahlad; Jain, Jayant; Yadavalli, Ravi Kumar

doi:10.1016/j.engfailanal.2022.106244

Cited by 13 publications

(1 citation statement)

References 31 publications

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“…SS 304 H is used in the superheater and reheater sections of power plants. 4 Besides boiler applications, SS 304 H steels are extensively used in automotive and aerospace applications. Welding is one of the major processes that is widely used in the manufacture of boiler components.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies and optimization of process parameters in laser welding of stainless steel 304 H

Selvaperumal

Thangaraju

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The prime objective of this work is to find the best combination of parameters in laser welding of stainless-steel 304 H plates. CO2 laser welding was used to join 5 mm thick stainless-steel 304 H plates. Laser power, welding speed, and focal position were used as input parameters, and experiments were conducted on the basis of the Taguchi L27 matrix. The quality of the weld was analysed by measuring depth of penetration, bead width and hardness. The best parameter combination was found using artificial neural network and genetic algorithm. The Levenberg–Marquardt algorithm predicted output responses more accurately. A confirmatory test was carried out for the optimized parameters identified by the genetic algorithm. The percentage error between the experimental and predicted genetic algorithm values was below 6%. In comparison to the base metal, the optimized weld hardness was increased by 8%. The electron backscatter diffraction analysis of the optimized weld revealed the presence of a higher percentage of high-angle grain boundary than low-angle grain boundary.

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Section: Introductionmentioning

confidence: 99%