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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Mechanical Characteristics and Application Properties of Metals and Non-metals for Technology: An EPD Symposium in Honor of Donato Firrao
Presentation Title Creep-oxidation-small Fatigue Crack Interaction in Grade 91 Steel
Author(s) Sumit Bahl, Sebastien Dryepondt, Lawrence Allard, Satyam Suwas, Amit Shyam
On-Site Speaker (Planned) Amit Shyam
Abstract Scope This presentation will report an unusual effect of hold time on the rate of growth of creep-fatigue small cracks at 550 C in Grade 91 steel. It was found that the introduction of hold time (up to 10 s) led to a slight reduction in crack growth rate while higher hold times (> 100 s) even led to complete arrest of the crack. Microstructural analyses were performed to determine the responsible deformation and oxidation mechanisms. It will be shown that with the introduction of a hold time an enhanced rate of cyclic softening and oxidation was responsible for the reduction in the crack growth rate as well as the complete arrest of the crack under creep-fatigue conditions. A model that incorporates the contribution of oxidation and deformation mechanisms in creep-small fatigue crack growth will be presented.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Alumina Feeding System Changes in Aluminum Electrochemical Cell with D18 Technology for Energy Efficiency (Case Study: Almahdi- Hormozal Aluminum Smelter)
Corrosion Micro-scale Features and Alloy Microstructure Effects on Fatigue Initiation of AA7050-T7451
Creep-oxidation-small Fatigue Crack Interaction in Grade 91 Steel
Ductile Fracture Assessment of Hot Isostatically Pressed Stainless Steel Using 3D X-ray Computed Tomography
Effect of Initial As-cast Structure on the Evolution of Microstructure and Texture and Finally Ridging Behavior of Ferritic Stainless Steel
Effect of NaNO2 in Corrosion Inhibition of Micro-alloyed Steel in E20 and E40 Simulated Fuel Grade Ethanol Environment
Embrittlement in Cast Superaustenitic Stainless Steel
Fatigue Behavior of Metastable Austenitic Stainless Steel AISI 304 under Different Test Frequencies
Finding the Small Charge Explosion Center by Analyzing Occurrence of Mechanical Twins in FCC Metals
Flow Behavior of High Strength Aluminum Alloy after Cold Rolling
Friction and Wear Characteristics of 304 Stainless and Rolled Upper Bainitic Rail Steels
Hot Ductility of X70 Pipeline Steel in Continuous Casting
Influence of Surface and Near Surface Defects Caused by Laser Beam Cutting on the Fatigue Behavior of Plate-like Shaped Parts Made of Metastable Austenitic Stainless Steel AISI 304
Inhibitive Influence of Cephalexin Compound on Degradation Characteristics of Mild Steel in NaCl Medium
Integration of Metallography, Fractography and Mechanical Properties Tests as a Key to Failure Analysis of Quenched and Tempered Large Steel Components
Microstructure and Mechanical Properties of Low-carbon Ferritic and Bainitic Steels with Different Contents of Mo, Ti and Nb for Seismic and Fire-resistant Applications
Production of Cu2O Powder Using Electrodeposition Method
Quench Embrittlement and Intergranular Fracture in High Carbon Steels
Sensitization Effects on Environmentally-assisted Cracking in 5XXX Al Alloys
Tensile Behavior and Microstructure of TWIP Steels from Low to Warm Temperatures
Thermo-Calc of the Phase Diagrams of the Nb-N System
Welding Between Steels and Aluminum Alloys for Hybrid Car-body Applications
Young’s Modulus and Hardness of Metal Amorphous Nanocomposites (MANCS) Determined by Nanoindentation

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