Creep and Fatigue Behavior in Micro-alloyed Steels - A Review

Raj, A and Goswami, B and Ray, Ashok K (2014) Creep and Fatigue Behavior in Micro-alloyed Steels - A Review. High Temperature Materials and Processes, 33(1) (IF-0.356). pp. 1-12.

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This is a study of microalloyed steels for power plants and reactors. Components operate at coal dust fire temperature or thermal states of reactors, prone to creep during its service. This is to assess remaining life after passage of valuable life by variation in microstructure, e.g. cavity formation. Precipitation at the sub-grain boundaries and grain interior has increased high temperature strength. Coarsening of these appears at the end of life. Variation of heat treatment like spheroidising in place of solutionizing has been responsive to deteriorate performance. Dislocation interplay with precipitate has been acceptable while interaction among dislocations to forest dislocation has been unacceptable. Dislocation assisted nucleation of precipitates of fine size has been found to strengthen steel by thermo-mechanical control process with in greater heating temperature and lower finish rolling temperature. High temperature performance of materials has been assessed by creep, accelerated creep, creep-fatigue and fatigue performances. Increasing temperature for increasing efficiency has correlated the phase transformation of steel. Fatigue performances have been included in creep properties of materials when intermittent shut down-shut up schedules are operated, e.g. peaking power plants

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:power plant; reactor; creep; fatigue; heat-resistant alloy; degradation of steel; ferrite steel; creep-fatigue; cast steels; rotor; turbine blades; thermomechanical loading
Divisions:Material Science and Technology
ID Code:6947
Deposited By:Sahu A K
Deposited On:04 Jun 2014 11:35
Last Modified:04 May 2016 14:46
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