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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
Presentation Title Cyclic Deformation Induced Twinning in an Austenitic Ferritic Two Phase Alloy during Low Cycle Fatigue
Author(s) Guocai Chai, Guocai Chai, Lars Ewenz, Katarina Persson, Martina Zimmermann
On-Site Speaker (Planned) Guocai Chai
Abstract Scope Cyclic deformation induced twinning in an austenitic ferritic steel with different phase strength, cold worked and aged conditions have been studied. Low cycle fatigue tests were performed at RT. The structures were studied using EBSD and ECCI. The results show that the softer phase and grain with a higher Schmid factor will undertake plastic deformation first. However, the deformation structures in the FCC and BCC phases are totally different. In austenitic or FCC phase, cyclic deformation induced twinning has occurred. This is the first observation in this type of material. In ferritic or BCC phase, dangle dislocations and dislocation subcells can be observed. However, they can be greatly influenced by material condition. No twinning occurred in the cold deformed material, and planar dislocation slips can now be observed in the ferritic phase in the aged material. The mechanisms related to the stacking fault energy of the material have been discussed.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3-D Understanding of Fatigue Crack Initiation from Inclusions in Inconel 718 Alloy
A Data Science Framework for Reduced-order Microstructure-sensitive Rank Ordering of Fatigue Performance
A Physically-based Methodology for the Deterministic Prediction of Microstucturally-sensitive Fatigue Crack Growth
A Qualitative FE Analysis of the Effect of the Local Texture on the Heterogeneous Plastic Strain Field in Nickel-based Superalloys during Low Cycle Fatigue
A Voxel-based Meshing Framework for the Simulation of Arbitrary 3D Crack Growth in Heterogeneous Materials
Analysis of Crack Initiation and Early Growth in Ti Using Miniaturised Ultrasonic Fatigue Testing
Characterization of Creep-fatigue Deformation in 9Cr-1MoV Steel and Weldments
Crack Growth under Rolling Contact Fatigue: 3D Characterisation and Modelling
Cyclic Deformation Induced Twinning in an Austenitic Ferritic Two Phase Alloy during Low Cycle Fatigue
Cyclic Stress-strain Response and Microstructural Evolution Modeling of Nickel-based Superalloys during Low Cycle Fatigue
Data-driven Approaches for Steel Fatigue Strength Prediction
E-39: Fatigue Crack Growth in a Low Density Aluminum Alloy Welded by Friction Spot Welding
E-40: Fatigue of the Beta Ti-15Mo and Ti-12Mo-6Zr-2Fe Alloys Treated above Beta Transus
E-41: Prediction and Fatigue Response of Ti-6Al-4V Alloy with Surface Modified by Chemical Treatment
Effect of Advanced Mechanical Surface Treatments on Room and Elevated Temperature Residual Stress, Microstructure, Strength, and Fatigue Behavior of ATI 718Plus Alloy
Effects of Cooling Condition on Fatigue Crack Propagation Behaviors of β-processed Ti-6Al-4V Alloys
Fatigue-assisted Discontinuous Grain Growth in Al Alloys
Fatigue Behavior of Ti6Al4V with Surface Modified by Femtosecond LASER
Fatigue Damage Precursor Effects on the Dynamic Properties of α-Iron
Fatigue of a Transient Liquid Phase Bonded Superalloy for Use in a Microchannel-heat Exchanger
Fatigue Strength Scaling and Deformation at the Nanoscale – Nanotwinned and Nanocrystalline Metals
From the Mechanistic Modelling of Fatigue Crack Formation to the Complexity of Component Fatigue Life Assessment
High-throughput Fatigue Experiments for Early Damage Evolution and Lifetime Prediction
Identification of Fatigue Weak Links in Aluminum Alloys Using a Data-driven Approach
Influence of Cold Spray on the Enhancement of Corrosion Fatigue of the AZ31B Cast Mg Alloy
Investigation of Slip Transfer across Phase Boundaries with Application to Cold Dwell Facet Fatigue
Low Cycle Fatigue of Friction Stir Welded Aluminum Lithium 2099
Microstructural and Mechanical Properties of Linear Friction Welded Ti-6Al-2Sn-4Zr-6Mo
Microstructure, Strain Localization and Fatigue in a Polycrystalline Nickel Base Superalloy at High Temperature
Miniaturised Ultrasonic Fatigue Testing in Torsion
Modeling of Creep-fatigue Crack Growth in Steels for High Temperature Structural Applications
Modelling Microstructural Alterations in Bearing Steels under Rolling Contact Fatigue
Nickel-titanium-hafnium Alloy Design for Tribological Systems
Predicting the Effect of Microstructure on the Likelihood of Early Fatigue Failures Using Data Analytics Algorithms
Prediction of Intergranular Micro-crack Initiation Induced by the Impingement of Persistent Slip Bands on Grain Boundaries
Prediction of Microstructurally–influenced Fatigue Crack Propagation
Simulation and Experimental Validation of Damage Accumulation and Phase Transformation during Cyclic Mechanical Loading of a Metastable Austenitic Stainless Steel Considering Prehistory Effects
Statistical Characterization of Microstructure and Fatigue of Wire and Arc Additive Manufactured Stainless Steel 304
Subcycle Fatigue Crack Growth Formulation under Positive and Negative Stress Ratios
Temperature and Microstructural Dependence of Dwell Fatigue in Dual-phase Titanium Alloys
The Effect of Dwell on Fatigue Crack Growth in a Ti-6Al-2Sn-4Zr-6Mo Alloy
The Effect of Grain Size on Low Cycle Fatigue and Cyclic Stress Strain Behavior of Unalloyed Mg
Thermal Fatigue Behavior of High Cr Roller Steel
Time-based Subcycle Formulation for Fatigue Crack Growth under Arbitrary Random Variable Loadings

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