Creep Rupture of the Simulated HAZ of T92 Steel Compared to that of a T91 Steel
AbstractThe increased thermal efficiency of fossil power plants calls for the development of advanced creep-resistant alloy steels like T92. In this study, microstructures found in the heat-affected zone (HAZ) of a T92 steel weld were simulated to evaluate their creep-rupture-life at elevated temperatures. An infrared heating system was used to heat the samples to 860 °C (around AC1), 900 °C (slightly below AC3), and 940 °C (moderately above AC3) for one minute, before cooling to room temperature. The simulated specimens were then subjected to a conventional post-weld heat treatment (PWHT) at 750 °C for two hours, where both the 900 °C and 940 °C simulated specimens had fine grain sizes. In the as-treated condition, the 900 °C simulated specimen consisted of fine lath martensite, ferrite subgrains, and undissolved carbides, while residual carbides and fresh martensite were found in the 940 °C simulated specimen. The results of short-term creep tests indicated that the creep resistance of the 900 °C and 940 °C simulated specimens was poorer than that of the 860 °C simulated specimens and the base metal. Moreover, simulated T92 steel samples had higher creep strength than the T91 counterpart specimens. View Full-Text
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Peng, Y.-Q.; Chen, T.-C.; Chung, T.-J.; Jeng, S.-L.; Huang, R.-T.; Tsay, L.-W. Creep Rupture of the Simulated HAZ of T92 Steel Compared to that of a T91 Steel. Materials 2017, 10, 139.
Peng Y-Q, Chen T-C, Chung T-J, Jeng S-L, Huang R-T, Tsay L-W. Creep Rupture of the Simulated HAZ of T92 Steel Compared to that of a T91 Steel. Materials. 2017; 10(2):139.Chicago/Turabian Style
Peng, Yu-Quan; Chen, Tai-Cheng; Chung, Tien-Jung; Jeng, Sheng-Long; Huang, Rong-Tan; Tsay, Leu-Wen. 2017. "Creep Rupture of the Simulated HAZ of T92 Steel Compared to that of a T91 Steel." Materials 10, no. 2: 139.