High Temperature Deformation of TC18 Titanium Alloy

Li, Chen-Wei; Xie, Honglan; Mao, Xiaonan; Pengsheng, Zhang; Hou, Zhimin

doi:10.1016/s1875-5372(17)30089-9

Cited by 12 publications

(2 citation statements)

References 5 publications

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“…In general, the flow stress decreases with an increase in the deformation temperature or decrease in the strain rate. Stress concentration and release at the grain boundary are the main causes of the flow curve stress fluctuation phenomena, showing a discontinuous hardening phenomenon, [ 26 ] and such phenomenon are generally associated with precipitate‐interactions or other surmountable obstacles to dislocation motion. It can be seen from Figure 3a that the flow stress rises rapidly to the maximum owing to the effect of WH generated at the initial stage of deformation.…”

Section: Resultsmentioning

confidence: 99%

Study on Hot Deformation Behavior and Dynamic Recrystallization Mechanism of Cu‐Ti‐Fe Alloy

Wang,

Ren,

Wang

et al. 2023

Adv Eng Mater

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Hot compression experiments with the deformation temperatures of 750‐950 °C and the strain rates of 0.01‐10 s‐1 were carried out on a Gleeble‐3500 thermal‐mechanical simulator. The flow behavior and dynamic recrystallization (DRX) mechanism of the Cu‐Ti‐Fe alloy were systematically studied under different hot deformation conditions. According to the curves of flow stress and work hardening rate, the DRX critical condition of the alloy is obtained, and the critical stress value of DRX is small under high‐temperature and low‐strain rate. After fitting, the logarithmic values of the critical stress and critical strain have a linear relationship with lnZ, which indicates that the alloy is more prone to DRX at high temperatures and low strain rates. The Arrhenius constitutive model of the alloy was established, the linear correlation coefficient (R2) was 0.984. Combined with the microstructure of Cu‐Ti‐Fe alloy, the microstructure evolution characteristics and DRX mechanism were elucidated. The dominant mechanism of the alloy under the deformation temperature of 750–950 °C is the DRX mechanism. The LAGBs transform into HAGBs and continuous dynamic recrystallization (CDRX) grains form. Abundant dislocations gather near the HAGBs, causing grain boundaries to protrude. High‐temperature conditions make the dislocations disappear, forming discontinuous dynamic recrystallization (DDRX) grains.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Study on Hot Deformation Behavior and Dynamic Recrystallization Mechanism of Cu‐Ti‐Fe Alloy

Wang,

Ren,

Wang

et al. 2023

Adv Eng Mater

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“…Due to its outstanding properties consisting of mechanical properties, anticorrosive performance, and thermal treatability, near-β titanium alloy is comprehensively applied in the crucial manufacture of load-bearing aircraft components [1,2]. Usually, hot deformation is necessarily utilized to improve the microstructures and further optimize the practical performance of titanium alloys [3][4][5]. The coupling effects of multiple forming parameters induce intricate evolving characteristics of microstructures and high-temperature flow behavior of titanium alloys [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Dislocation Substructures Evolution and an Informer Constitutive Model for a Ti-55511 Alloy in Two-Stages High-Temperature Forming with Variant Strain Rates in β Region

Tan

Lin

et al. 2023

Materials

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The high-temperature compression characteristics of a Ti-55511 alloy are explored through adopting two-stage high-temperature compressed experiments with step-like strain rates. The evolving features of dislocation substructures over hot, compressed parameters are revealed by transmission electron microscopy (TEM). The experiment results suggest that the dislocations annihilation through the rearrangement/interaction of dislocations is aggravated with the increase in forming temperature. Notwithstanding, the generation/interlacing of dislocations exhibit an enhanced trend with the increase in strain in the first stage of forming, or in strain rates at first/second stages of a high-temperature compressed process. According to the testing data, an Informer deep learning model is proposed for reconstructing the stress–strain behavior of the researched Ti-55511 alloy. The input series of the established Informer deep learning model are compression parameters (compressed temperature, strain, as well as strain rate), and the output series are true stresses. The optimal input batch size and sequence length are 64 and 2, respectively. Eventually, the predicted results of the proposed Informer deep learning model are more accordant with the tested true stresses compared to those of the previously established physical mechanism model, demonstrating that the Informer deep learning model enjoys an outstanding forecasted capability for precisely reconstructing the high-temperature compressed features of the Ti-55511 alloy.

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Microstructure Evolution during High-Temperature Deformation of Ti-5Al-5V-2Mo-1Cr-1Fe Alloy under Compression

Kumar

Sarkar

Gupta

et al. 2021

J. of Materi Eng and Perform

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High Temperature Deformation of TC18 Titanium Alloy

Cited by 12 publications

References 5 publications

Study on Hot Deformation Behavior and Dynamic Recrystallization Mechanism of Cu‐Ti‐Fe Alloy

Study on Hot Deformation Behavior and Dynamic Recrystallization Mechanism of Cu‐Ti‐Fe Alloy

Dislocation Substructures Evolution and an Informer Constitutive Model for a Ti-55511 Alloy in Two-Stages High-Temperature Forming with Variant Strain Rates in β Region

Microstructure Evolution during High-Temperature Deformation of Ti-5Al-5V-2Mo-1Cr-1Fe Alloy under Compression

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