Hot workability analysis of AZ61 Mg alloys with processing maps

Wu, Horng-yu; Wu, Chung Hsien; Yang, Jyh Bin; Lin, Mingjie

doi:10.1016/j.msea.2014.04.017

Cited by 46 publications

(18 citation statements)

References 32 publications

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“…As indicated, the Q values of the present TAZ811 were relatively high compared to that of conventional Mg-AlZn [22] and Mg-Zn-Al based [39] alloys, but lower than that in the Mg-Gd-Zn [40] and Mg-Gd-Y-Zn alloys [29]. It was indicated that the higher Q values as to the self-diffusion of Mg (135 kJ/mol) were mainly due to the back stress caused by the presence of intermetallic particles in the matrix [15,29].…”

Section: Comparison With Deformation Behaviors Other Mg Alloysmentioning

confidence: 60%

“…The practical temperature of the present homogenized TAZ811 alloy was much lower than those of homogenized Mg-Gd-Zn [40] and Mg-Gd-Y-Zn [29] alloys. Meanwhile, the practical strain rate was much higher than the Mg-Al-Zn [22], Mg-Zn-Al [39], Mg-Gd-Zn [40] and Mg-Gd-Y-Zn [29] alloys.…”

Section: Comparison With Deformation Behaviors Other Mg Alloysmentioning

confidence: 92%

“…Elsayed et al [21] indicated that the microalloyed extruded Mg-Sn-AlZn alloy exhibited even higher yield strength of~360 MPa at the expense of ductility and showed good yield anisotropy of~1 when extruded at 250°C. However, extrusion processing is time and cost consuming, and homogenization is usually used to reduce segregation to improve the workability of the cast alloys [22]. Therefore, the aim of the present work is to understand the hot deformation behavior of a homogenized Mg-8Sn-1Al-1Zn (TAZ811) alloy under various temperatures and strain rates.…”

Section: Introductionmentioning

confidence: 99%

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Optimum parameters and kinetic analysis for hot working of a homogenized Mg–8Sn–1Al–1Zn alloy

Cheng

You

et al. 2015

Materials & Design

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Section: Comparison With Deformation Behaviors Other Mg Alloysmentioning

confidence: 60%

Section: Comparison With Deformation Behaviors Other Mg Alloysmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimum parameters and kinetic analysis for hot working of a homogenized Mg–8Sn–1Al–1Zn alloy

Cheng

You

et al. 2015

Materials & Design

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“…When strain ε and temperature T are unchangeable, stress σ is regarded as a function of the strain rate ε , which is described as a power law relationship [26][27][28], namely:…”

Section: Principle For the Processing Mapmentioning

confidence: 99%

Processing Map of NiTiNb Shape Memory Alloy Subjected to Plastic Deformation at High Temperatures

Wang

Jiang

Zhang

2017

Metals

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Abstract:The processing map of Ni 47 Ti 44 Nb 9 (at %) shape memory alloy (SMA), which possesses B2 austenite phases and β-Nb phases at room temperature, is established in order to optimize the hot working parameters. Based on true stress-strain curves of NiTiNb SMA during uniaxial compression deformation at the temperatures ranging from 700 to 1000 • C and at the strain rates ranging from 0.0005 to 0.5 s −1 , according to dynamic material model (DMM) principle, the processing map of NiTiNb SMA is obtained on the basis of power dissipation map and instability map. The instability region of NiTiNb SMA increases with increasing the true strain and it mainly focuses on the region with high strain rate. The workability of NiTiNb SMA becomes worse and worse with increasing plastic strain, as well as decreasing deformation temperature. There exist two stability zones which are suitable for hot working of NiTiNb SMA. In one stability region, the deformation temperature ranges from 750 to 840 • C and the strain rate ranges from 0.0003 to 0.001 s −1 . In the other stability region, the deformation temperature ranges from 930 to 1000 • C and the strain rate ranges from 0.016 to 0.1 s −1 . The severe microstructure defects, such as coarsening grains, band microstructure, and intercrystalline overfiring appear in the microstructures of NiTiNb SMA which is subjected to plastic deformation in the instability zone.

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“…[5]- [11]); however, no computer simulation of deep drawability of this alloy is available in literature. In this project the aim was to assess the hot workability of the fine grain AZ61 Mg alloy.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Hot Formability of AZ61 Mg Alloy

Ramezani¹,

Neitzert²

2015

MME

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High temperature mechanical properties and formability of the AZ61 magnesium alloy are evaluated in this paper. Tensile tests were conducted to obtain the formability parameters at elevated temperatures of up to 400˚C. The results showed that at higher temperature, yield strength and ultimate tensile strength of the material decrease significantly, while the material experiences an increase in ductility (maximum elongation before break). A model has been created in finite element software Abaqus to further study the deep drawability of the AZ61 Mg alloy. Effects of different process parameters such as punch and die geometry, forming speed and temperature as well as blank-holder force on square cup drawing of the AZ61 alloy were investigated and optimum process parameters are obtained which can be used as a design guide in sheet metal forming industry.

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Hot workability analysis of AZ61 Mg alloys with processing maps

Cited by 46 publications

References 32 publications

Optimum parameters and kinetic analysis for hot working of a homogenized Mg–8Sn–1Al–1Zn alloy

Optimum parameters and kinetic analysis for hot working of a homogenized Mg–8Sn–1Al–1Zn alloy

Processing Map of NiTiNb Shape Memory Alloy Subjected to Plastic Deformation at High Temperatures

Investigation of Hot Formability of AZ61 Mg Alloy

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