Microscopic mechanism exploration and constitutive equation construction for compression characteristics of AZ31-TD magnesium alloy at high strain rate

Zhang, Feng; Liu, Zheng; Yang, Mengmeng; Su, Guoyue; Zhao, Rongfei; Mao, Pingli; Wang, Feng; Sun, Shijie

doi:10.1016/j.msea.2019.138571

Cited by 29 publications

(15 citation statements)

References 50 publications

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“…The CRSS of base slip is the lowest, while that of the extension twin is only greater than the basal slip [35]. Therefore, the main deformation systems in Mg alloys are basal slip and tension twinning [37,45].…”

Section: Ebsd Analysismentioning

confidence: 94%

Deformation Behavior and Dynamic Recrystallization of Mg-1Li-1Al Alloy

Feng

Pang

et al. 2021

Metals

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In this paper, the hot workability of Mg-1Li-1Al (LA11) alloy is assessed through a uniaxial compression test in a temperature range from 200 to 400 °C and a strain rate, έ, of 1–0.01 s−1. The present study reveals that flow stress increases when the strain rate increases and deformation temperature decreases. Based on the hyperbolic sine equation, the flow stress constitutive equation of this alloy under high-temperature deformation is established. The average activation energy was 116.5 kJ/mol. Avrami equation was employed to investigate the dynamic recrystallization (DRX). The DRX mechanism affected by the deformation conditions and Zener–Hollomon parameters is revealed. Finally, the relationship between DRX volume fraction and deformation parameter is verified based on microstructure evolution, which is consistent with the theoretical prediction.

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Section: Ebsd Analysismentioning

confidence: 94%

Deformation Behavior and Dynamic Recrystallization of Mg-1Li-1Al Alloy

Feng

Pang

et al. 2021

Metals

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“…Figure 7 depicts the biaxial true stress-strain curves of CP-Ti at different load ratios. The true stress and true strain were, respectively, calculated by using the following equations [35,36]:…”

Section: Effect Of Load Ratio On Biaxial Tensile Propertiesmentioning

confidence: 99%

Biaxial Tensile Behavior of Commercially Pure Titanium under Various In-Plane Load Ratios and Strain Rates

Zhang

Zhu

Zhou

et al. 2021

Metals

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The aim of the present work is to contribute to the characterization of the biaxial tensile behavior of commercially pure titanium, under various in-plane loading conditions at room temperature, by a non-contact digital image correlation system. Several loading conditions, with load ratio ranging from 4:0 to 0:4 and displacement rate ranging from 0.001 to 0.1 mm/s, are examined. It is found that the yield strength and ultimate tensile strength of biaxial sample are greater than that of uniaxial sample, where the equi-biaxial sample shows the highest strength. It is also observed that increase in strain rate leads to remarkable improvement of tensile strength. Fractographic analysis indicates that the shape and size of dimples are load ratio and strain rate dependent. Additionally, a modified Johnson–Cook constitutive model was proposed to account for the effect of strain rate on biaxial tensile deformation. The experimental results are in good agreement with the simulated results, indicating that the proposed model is reliable to predict biaxial tensile deformation of commercially pure titanium at different strain rates.

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“…It is always useful to have simple analytical models (but with sufficient accuracy for engineering applications) to describe a set of experimental behaviors [36][37][38][39][40][41]. Several constitutive material models were proposed in the literature , Bammann-Chiesa-Johnson [42], Zerilli-Armstrong [43], Bodner-Partom [44] models .…”

Section: Choice Of a Constitutive Mathematical Modelmentioning

confidence: 99%

Mechanical Properties of Spark Plasma Sintering-Processed Pure Ti and Ti-6Al-4V Alloys: A Comparative Study between Harmonic and Non-Harmonic Microstructures

et al. 2021

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Microstructure characteristics and compressive property relationships of so-called harmonic (composed by fine and coarse grains) and conventional pure titanium (Ti) and Ti-6Al-4V alloy processed by powder metallurgy route are presented in the present work. Electron backscatter diffraction (EBSD) analysis was performed to characterize the as-processed microstructures. The harmonicity structure of selected samples is described, and relevant EBSD maps are presented. The bulk samples’ hardness is reported, along with compressive responses at quasi-static and intermediate strain rates, ranging from 0.005 s−1 to 16 s−1. The strain rate sensitivity of these metallic samples is discussed, and the benefits in terms of mechanical properties of the harmonic microstructures compared with the non-harmonic conventional ones are highlighted. Finally, a modified Johnson–Cook model was shown to predict fairly the experimental results.

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Microscopic mechanism exploration and constitutive equation construction for compression characteristics of AZ31-TD magnesium alloy at high strain rate

Cited by 29 publications

References 50 publications

Deformation Behavior and Dynamic Recrystallization of Mg-1Li-1Al Alloy

Deformation Behavior and Dynamic Recrystallization of Mg-1Li-1Al Alloy

Biaxial Tensile Behavior of Commercially Pure Titanium under Various In-Plane Load Ratios and Strain Rates

Mechanical Properties of Spark Plasma Sintering-Processed Pure Ti and Ti-6Al-4V Alloys: A Comparative Study between Harmonic and Non-Harmonic Microstructures

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