Effect of Al on the columnar-to-equiaxed transition for Ti-6%Al and Ti-45%Al by cellular automaton

Min Zhang*, Yulan Zhou, Qin Xue, Jihong Li, Erlong, Mu

Department of Material Shaping and Control, School of Materials Science and Engineering, Xi’an University of Technology, NO.5 South Jinhua Road, Xi’an 710048, China

Adv. Mater. Lett., 2018, 9 (12), pp 889-894

DOI: 10.5185/amlett.2018.1904

Publication Date (Web): Sep 14, 2018

E-mail: zhmmn@xaut.edu.cn.br

Abstract


A dendritic growth model is established by combining the physical properties of dendritic growth with the characteristics of the cellular automaton (CA) method. The heat process and the molten pool model of the arc-shaped in the process of welding solidification are coupled by using the interpolation method. On the basis of that, the growth of dendrites in the molten pool for Ti-6%Al and Ti-45%Al alloys is simulated and the influence of aluminium content on the morphology of dendrites in the welding solidification process is analysed. And also the microstructural evolution of the molten pool during the solidification process is implemented under the condition of the non-uniform temperature field. The results indicate that the temperature presents the gradual distribution in the non-uniform temperature field and the microstructure grows competitively at the center of the molten pool. During the progress of solidification, the solute atoms are enriched in between dendrite arms with the segregation of solute. Simultaneously, with the change of temperature field, the morphology of dendrites has asymmetry. In addition, the columnar crystals are largely converted to equiaxed crystals for Ti-6%Al alloy while the result is the opposite for Ti-45%Al alloy resulting from the change of the aluminium content. The simulated results are in good agreement with the experimental ones.  

Keywords

Cellular automaton, dendritic distribution, solute concentration, welding heat process.

Current Issue
The Journey of a Decade to Advancing Materials
Are the Electrospun Polymers Polymeric Fibers?
Mechanical and Thermal Properties of Composite Material and Insulation for a Single Walled Tank for Cryogenic Liquids
Prediction of Long-Term Behavior for Dynamically Loaded TPU
Investigation of Doped Titanium Dioxide in Anatase Phase. Study ab initio using Density Functional Theory
Comparison between Single Al2O3 or HfO2 Single Dielectric Layers and their Nanolaminated Systems
Preparation of Stable and Optimized Antibody-gold Nanoparticle Conjugates for Point of Care Test Immunoassays
Resonance-Based Temperature Sensors using a Wafer Level Vacuum Packaged SOI MEMS Process
Integrated System Based on the Hall Sensors Incorporating Compensation of the Distortions
The Efficacy of Cinnamomum Tamala as a Potential Antimicrobial Substance against the Multi-Drug Resistant Enterococcus Faecalis from Clinical Isolates
The Effect of Complexing Reagent on Structural, Electrical and Optical Properties of CuS Thin Film
Laser Cladding of Fluorapatite Nanopowders on Ti6Al4V
Preparation and Evaluation of Sulfonate Polyethylene Glycol Borate Ester as a Modifier of Functional Properties of Complex Petroleum Lithium Grease

Upcoming Congress

Knowledge Experience at Sea TM