Microstructural Stability and Oxidation Resistance of 9-12 Chromium Steels at Elevated Temperatures Page: 3 of 12
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Figure 1. Backscattered electron image of HR54 after
showing TiC and Cu-rich precipitates.
100 hours at 750 C
scale) and as heat treated (in B scale) specimens. A Vickers indenter under 1 kg load was
used to measure hardness at elevated temperatures up to 700 C. The hot hardness testing
was performed in vacuum. Tensile testing of the heat treated specimens was performed at
room temperature using a screw driven machine at 0.5 mm/min loading rate. Fracture
surfaces were examined using SEM.
500 1000 1500
M 4 -
400 600 800
Figure 2. Thermodynamic calculations and experimental data (rectangles) for
mass fraction of precipitates in HR53 after 100 hours at 750 C (a) TiC and (b)
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Dogan, O.N.; Alman, D.E.; Jablonski, P.D. & Hawk, J.A. Microstructural Stability and Oxidation Resistance of 9-12 Chromium Steels at Elevated Temperatures, article, May 1, 2006; (digital.library.unt.edu/ark:/67531/metadc896015/m1/3/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.