Hot deformation behavior of as-cast Mg–Zn–Mn–Ce alloy in compression

Gao, Lei; Luo, Alan A.

doi:10.1016/j.msea.2012.09.094

Cited by 35 publications

(4 citation statements)

References 32 publications

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“…There are diverse thermomechanical deformation data on steels 15,[19][20][21][22][23][24][25][26][27] and other alloys [28][29][30][31] available in the relevant technical literature, none of which is on steel grade DH36 and in conditions that simulate FSW. One publication 15 discusses the effect of temperature and strain rate on the high temperature (850-1150uC) deformation behaviour of 42CrMo medium carbon low alloy steel by hot compression testing on a Gleeble thermomechanical simulator.…”

Section: Introductionmentioning

confidence: 99%

“…There are diverse thermo-mechanical deformation data on steels 15,[19][20][21][22][23][24][25][26][27] and other alloys [28][29][30][31] C) deformation behaviour of 42CrMo medium carbon low alloy steel by hot compression testing on a Gleeble thermo-mechanical simulator. It is reported that in high temperature and low strain rate deformation conditions, flow stress curves consist of four diverse stages which are governed by two opposing phenomena, work hardening and thermally induced softening, specifically dynamic recrystallisation (DRX) and dynamic recovery (DRV).…”

mentioning

confidence: 99%

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Thermomechanical deformation behaviour of DH36 steel during friction stir welding by experimental validation and modelling

Toumpis

Galloway

Arbaoui

et al. 2014

Science and Technology of Welding and Joining

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Friction stir welding is a solid state thermo-mechanical deformation process from which the plasticisation behaviour of the stirred material can be evaluated through the study of flow stress evolution. Flow stress data also supporting the development of a local microstructural numerical model have been generated. Hot compression testing of DH36 steel has been performed at a temperature range of 700 o C1100 o C and strain rates from 10 -3 s -1 to 10 2 s -1 to study the alloys thermo-mechanical deformation behaviour in conditions which simulate the actual friction stir welding process. It has been found that the evolution of flow stress is significantly affected by the test temperature and deformation rate. The materials constitutive equation and constants have been calculated after analysis of these data. Preliminary numerical analysis results are in good agreement with experimental observations.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Thermomechanical deformation behaviour of DH36 steel during friction stir welding by experimental validation and modelling

Toumpis

Galloway

Arbaoui

et al. 2014

Science and Technology of Welding and Joining

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“…These models incorporate, to varying degrees, the interactions of strain rate, temperature, and the phenomena of strain hardening or softening. Gao and Luo (2013) developed the constitutive model of the compression process of Mg-2Zn-0.4Mn-0.2Ce, calculated the activation energy of thermal working, and revealed the thermal deformation behavior and softening mechanism of the alloy in detail. Wei et al (2015) found that both the Ludwik and Zener-Hollomon models exhibit favorable agreement between the computed stress and the measured stress within a limited strain range while the modified Hensel-Spittel equation is capable of characterizing the entire deformation process at the studied deformation temperature.…”

Section: Graphical Abstract 1 Introductionmentioning

confidence: 99%

Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloy

Liu,

Yang,

Liao

et al. 2024

Front. Mater.

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In this work, the hot deformation behavior and microstructure evolution of ZK60 alloy are investigated. Meanwhile, constructive models and hot processing maps of ZK60 alloy during thermal tension are also established. Toward these ends, thermal tensile tests were performed at elevated deformation temperatures (523 K–673 K) and wide-ranging strain rates (0.0005 s−1 to 0.1 s−1). The findings indicated that as the tensile temperature increases and the strain rate decreases, the flow stress exhibited a decrease. To better evaluate the flow behavior of the alloy, Arrhenius model coupled strain effects and particle swarm optimization support vector machine (PSO-SVM) regression model are developed. Both the developed Arrhenius model and PSO-SVM regression model could depict the flow stress of the hot deformation ZK60 alloy. However, the results comparison revealed that the PSO-SVM regression model provides a more accurate prediction of the stress in the studied alloy with the AARE and R of 1.12% and 0.9984, respectively. The microstructure observation revealed that the primary softening mechanism in the alloy is predominantly dynamic recrystallization (DRX). Using the created hot processing map, the stability processing areas for this alloy were concentrated in the range of 573 K–653 K with a strain rate of 0.001 s-1 to 0.08 s-1. The described model is implemented in the finite element software. Then, the wire-drawing process of ZK60 alloy is also simulated.

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“…Mg-Mn-Ce system constitutes a promising alloy base for expanded components [6][7][8]. The addition of cerium is known to improve the strength and elevated temperature properties of magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of As-Cast and As-Extruded Mg-1Mn-0.6Ce-3Y Alloy

Liu

Cao

2016

MSF

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Mg-1Mn-0.6Ce-3Y alloy was prepared by metal mould casting method. The as-cast ingot was homogenized and then hot-extruded by an extrusion ratio of 16:1 at 380 °C. Microstructure and mechanical properties of the as-cast and hot-extruded samples were investigated. The results showed that the as-cast sample mainly consisted of α-Mg, Mg12Ce, and Mg24Y5 phases. The average grain size of the sample homogenized at 380 °C was about 100μm, and it was greatly refined to about 6μm by dynamic recrystallization for the hot-extruded sample. The ultimate tensile strength, 0.2% yield strength and elongation of the hot-extruded sample were 244 MPa, 178 MPa and 37.5%, respectively. They were enhanced by 82%, 197% and 400%, correspondingly compared with those of the as-cast sample. The improvement of the strengths was attributed to the grain refinement, breakup of the precipitates and increase of the dislocation density.

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Hot deformation behavior of as-cast Mg–Zn–Mn–Ce alloy in compression

Cited by 35 publications

References 32 publications

Thermomechanical deformation behaviour of DH36 steel during friction stir welding by experimental validation and modelling

Thermomechanical deformation behaviour of DH36 steel during friction stir welding by experimental validation and modelling

Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloy

Preparation and Characterization of As-Cast and As-Extruded Mg-1Mn-0.6Ce-3Y Alloy

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