Application of Response Surface Methodology for Modeling of Postweld Heat Treatment Process in a Pressure Vessel Steel ASTM A516 Grade 70

<div>HAZ microstructure of sample in a PWHT with (a) PWHT temperature of 645°C and PWHT time of 5 hr and (b) PWHT temperature of 670°C and PWHT time of 25 hr.</div>

The Scientific World Journal

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Figure 6

Figure 6: Application of Response Surface Methodology for Modeling of Postweld Heat Treatment Process in a Pressure Vessel Steel ASTM A516 Grade 70 