Page 88 - Handbook of Materials Failure Analysis
P. 88
FIGURE 4.10
Internal diameter values versus tube length: creep graphs after 114,000 h (——) and after
90,000 h ( )[30].
Table 4.3 Internal Diameter and Hardness Values Measured on Samples
B2-B6 (Tube Decommissioned After 114,000 h of Service)
Hardness (HV)
Internal Deformation ε (%) (Mean Value Across
Sample Diameter (See Equation 4.3) the Thickness)
B2 102.4 0.8% 175
B3 103.5 1.9% 151
B4 100.8 0.0% 171
B5 102.2 0.6% 179
B6 104.0 2.4% 162
10 mm
FIGURE 4.11
Optical metallography of a tube section.
