Intro
Acknowledgements
Contents
About the Authors
1 Metallurgy of P91 Steel
References
2 As-Received Pipe Details
2.1 Dimensions: Pipe and Creep Specimen
2.2 Material Composition
2.3 Mechanical Properties
3 Creep Testing Under Different Conditions
3.1 Creep Life of P91 Steel
3.2 Creep Curves
4 Micrograph Description
4.1 As-Received Pipe
4.2 Micrographs of Creep Interrupted P91: 550 °C Temperature and 200 MPa Stress
4.3 Micrographs of Creep Interrupted P91: 600 °C Temperature and 140 MPa Stress

4.4 Micrographs of Creep Interrupted P91: 650 °C Temperature and 100 MPa Stress
5 Effect of Creep Exposure on Material Behaviors
5.1 Precipitate Size Variation
5.2 Hardness Variation
5.3 Magnetic Parameter Variation
5.4 Nonlinear Ultrasonic (NLU) Parameter Variation
5.5 Conventional Ultrasonic Parameter Variation
Supplements
Brief Description of Experimental Methodologies
Sample Preparation
Creep Testing
Microscopy of Samples
Optical and Scanning Electron Microscopy
Transmission Electron Microscopy
Image Analysis
Mechanical Property Determination

Brief Description of NDE Techniques
Electromagnetic Method
Nonlinear Ultrasonic (NLU) Technique