Cellular Automaton Modeling of Dynamic Recrystallization of Nimonic 80A Superalloy Based on Inhomogeneous Distribution of Dislocations Inside Grains

2018 ◽  
Vol 27 (9) ◽  
pp. 4955-4967 ◽  
Author(s):  
Qianhong Xu ◽  
Chi Zhang ◽  
Liwen Zhang ◽  
Wenfei Shen ◽  
Qing Yang
Keyword(s):  
Dynamic Recrystallization ◽  
Cellular Automaton ◽  
Inhomogeneous Distribution ◽  
Nimonic 80A ◽  
Distribution Of Dislocations

Simulation of dynamic recrystallization in 23Co13Ni11Cr3Mo steel using a modified cellular automaton

2014 ◽  
Vol 21 (2) ◽  
pp. 454-459 ◽  
Author(s):  
Shi-quan Huang ◽  
You-ping Yi ◽  
Peng-chuan Li ◽  
Hai-lin He
Keyword(s):  
Dynamic Recrystallization ◽  
Cellular Automaton

Cellular Automaton Simulation and Experimental Observation of the Dynamic Recrystallization of Titanium Alloy TC11 with Varied Strain Rates

2012 ◽  
Vol 476-478 ◽  
pp. 71-74
Author(s):  
Zhi Fu Yang ◽  
Qing Yuan Meng ◽  
Yu Hang Jing
Keyword(s):  
Titanium Alloy ◽  
Dislocation Density ◽  
Dynamic Recrystallization ◽  
Strain Rate ◽  
Cellular Automaton ◽  
Experimental Observation ◽  
Hot Working ◽  
Strain Rates ◽  
Working Process ◽  
Loading Sequence

During the metal hot working process, the dislocation density will vary with strain and strain rate, and the variation of the dislocation density will affect the grain evolution subsequently. The cellular automaton (CA) method is an effective technique used to simulate the grain evolution of materials. In this work, a dynamic recrystallization (DRX) model of titanium alloy TC11 under varied strain rates was established by the use of cellular automaton method and verified by experimental observation. Two types of loading processes called “begin fast and then slowly” and “begin slowly and then fast” were simulated to investigate the titanium alloy TC11 grain evolution processes during hot working. The simulation results are in good coincidence with experimental data. Both cellular automaton simulation and experimental results show that the flow stresses and DRX transformation percentage during hot working process of the TC11 alloy are closely related not only to the strain rate but also to the loading sequence. Compared to the “begin slowly and then fast” loading sequence, the flow stress with the “begin fast and then slowly” loading sequence is relatively smaller under the same strain rates, and the DRX transformation percentage is relatively larger.

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