Assessment of Microstructural Degradation in 2.25Cr-1Mo Steel Using Miniature Specimen Technique
| Periodical | Defect and Diffusion Forum (Volumes 319 - 320) |
|---|---|
| Main Theme | Defects and Diffusion in Metals XIII |
| Edited by | D.J. Fisher |
| Pages | 25-35 |
| DOI | 10.4028/www.scientific.net/DDF.319-320.25 |
| Citation | B.B. Jha et al., 2011, Defect and Diffusion Forum, 319-320, 25 |
| Online since | October, 2011 |
| Authors | B.B. Jha, T.K. Sahoo, D. Tripathy, Barada Kanta Mishra |
| Keywords | 2.25Cr-1Mo Steel, Larson-Miller Parameter (LMP), Microstructural Degradation, Plastic Instability, Small Punch Test |
| Price | US$ 28,- |
Miniature specimen techniques viz. small-punch tests (SPT) have been carried out at room temperature in order to correlate the microstructural degradation of 2.25Cr-1Mo steel with that of SPT parameters. Microstructural degradation of this steel has been introduced as a result of thermal ageing corresponding to Larson-Miller parameters (LMP) values of 33,012, 35,402, 37,846 and 38,374. SPT parameters viz. total area and area under the region of plastic instability of the load-displacement curve have been found to decrease with an increase in LMP values. A strength parameter viz. UTS obtained using uniaxial tensile tests has also been found to decrease with an increase in LMP values. The results indicated that miniature specimen techniques viz. small-punch test could be successfully used to assess the degradation of microstructures in 2.25Cr-1Mo steel generated due to their exposure to high temperatures.
