• Ms. Shikha Parashar

Due to their favorable combination of high strength, corrosion resistance, perfect mechanical properties, workability, and low cost, austenitic heat resistant steels have been considered as important candidate materials for advanced supercritical boilers, nuclear reactors, super heaters, and chemical reactors. Because the precipitation behavior of steels over long-term operation at high temperatures may cause mechanical characteristics to deteriorate, it's critical to understand how secondary phases evolve in the microstructure of steels. An overview of recent advances in the precipitation behavior and coarsening process of different precipitates in austenitic steels during aging is presented here. MX carbonitrides, M23C6 carbides, Z phase, sigma phase, and Laves phase are some of the secondary phases that occur under service circumstances. The coarsening rate of M23C6 carbides is found to be much greater than that of MX carbonitrides. A constitutive equation may be constructed to explain the thermal deformation mechanism, and the resulting processing maps can be used to optimize thermal processing settings, resulting in better thermal processing characteristics of steels.

Austenitic Steels, Coarsening Behavior, Hot Deformation, Heat-Resistant Microstructure.

"Precipitation and Hot Deformation Behavior of Austenitic Heat-resistant Steels: a Review", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.1033-1037, December-2018, Available :http://www.jetir.org/papers/JETIRFH06174.pdf

"Precipitation and Hot Deformation Behavior of Austenitic Heat-resistant Steels: a Review", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp1033-1037, December-2018, Available at : http://www.jetir.org/papers/JETIRFH06174.pdf