M. Kamaraj

Bio: M. Kamaraj is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Crack growth resistance curve & Creep. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.

Creep crack growth in type 316 stainless steel and its weldment

Abstract: The creep crack growth behaviour of type 316stainless steel and its weldment in the temperature range 600° to BOOoe has been studied under plane stress conditions. The creep crack growth (eeG) rate bears a relation with sheloa;d point deflection (LPD) rate independent of the load. The parameters stress mtenstty factor, K,and the energy rate line integral C*,have been correlated with the e.eG rate. At 6000e tsecrack growth takes place along the interface between austemte and thsdelta fernte: At 700° and BOOoe sigma phase formation is dominant and crack growth tS along the Stgma phase and austenite.

Influence of microstructure and composition on mechanical properties of some AISI 300 series weld metals

Abstract: A brief overview is given of the·current understanding of the solidification microstructure, the effect of aging and precipitation processes, and the factors controlling the mechanical and high temperature properties of some AISI 300 series weld metals. The effects of alloy chemistry on the distribution and morphology of the carbide and intermetallic phases in the weld metal are discussed. It is shown that the precipitation behaviour depends strongly on the carbon, silicon, chromium, and molybdenum content of the weld metal and the rate of dissolution of the δ-ferrite. The precipitation reactions are considered to be of primary importance in controlling the mechanical properties of the weld metals, and can result in significant reduction in weld metal ductility and toughness. Much of the deterioration in properties can be directly attributed to the formation of secondary phases such as M23C6 and the intermetallic σ and χ phases. A much more complex situation is found to prevail with respect to cre...

Application of Creep Ductility Model for Evaluation Creep Crack Growth Rate of Type 316SS Series

Abstract: This paper is to evaluate the creep crack growth rate (CCGR) of the type 316SS series: 316SS, 316FR and 316LN, and to apply a creep ductility model. A number of the data are collected through wide literature surveys and experiment, and evaluated by the C* parameter. The results of the CCGR data were nearly matched with a small scattering band regardless of the different applied stresses, temperatures and test specimens configuration. In the CCGR, type 316FR and 316LN steels were slower than type 316SS. Type 316SS showed a better agreement in the application of the creep ductility model than the type 316FR and 316LN steels.