Deformation mechanism of ZK61 magnesium alloy cylindrical parts with longitudinal inner ribs during hot backward flow forming

Xia, Qinxiang; Long, Jinchuan; Xiao, Gangfeng; Yuan, Shuai; Qin, Yi

doi:10.1016/j.jmatprotec.2021.117197

Cited by 31 publications

(8 citation statements)

References 38 publications

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“…During rotary extrusion, there are complex interactions between factors involved in forming quality [15]- [16] . In order to obtain the best combination of parameters for a new split convex die with a double-working belt, the response surface method was used in this study to establish a regression equation to fit the functional relationship between the variables and the response target.…”

Section: Multi-objective Optimization Of Molding Parametersmentioning

confidence: 99%

Simulation and optimization of parameters for rotary extrusion of magnesium alloy barrel with inner ring rib based on response surface method

Guo,

Xiao,

Yun

2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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As an important lightweight and high-strength structural component, magnesium alloy barrel with inner ring rib is mostly used as key components in aerospace. Aiming at the key problems of insufficient radial height and low strength in the existing method of forming magnesium alloy barrel with inner ring rib, a new forming process of rotational extrusion forming of inner ring rib is innovatively proposed. The response surface based on the finite element method (FEM) simulation of the Central Composite Experiment Design is established. A new split convex die with deep inner slot and double working strips, together with a rotating concave die that drives the die rotation, was adopted for the die. After multiobjective optimization of the structural parameters of the split die, the optimal combination of parameters is obtained. The results show that the optimal combination of process parameters is 110° for the metal gathering slot opening angle, 8mm for the embedding angle of the working strip, 36mm for the transition rounding of the metal gathering slot and the inner ring rib filling slot, and 26mm for the stagnation zone angle. Finally, the optimal parameter combination is applied to experimental trial production to verify the feasibility of the new process.

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Section: Multi-objective Optimization Of Molding Parametersmentioning

confidence: 99%

Simulation and optimization of parameters for rotary extrusion of magnesium alloy barrel with inner ring rib based on response surface method

Guo,

Xiao,

Yun

2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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“…There are also some scholars that have explored at the microscopic level the mechanism of spinning forming and the improvement in the spinning process. Xia et al [18] introduced a novel approach that integrates a three-dimensional thermal processing map with numerical simulation to address issues related to underfilling and depression at the back of ribs in the spinning process of magnesium alloy thin-walled cylindrical parts with internal ribs. This study unveiled the forming mechanisms underlying different defects, analyzed the metal flow and stress-strain state of distinct workpiece regions, and assessed the power consumption efficiency in the spinning process.…”

Section: Introductionmentioning

confidence: 99%

On optimization of Spin-Forming Process Parameters for Magnesium Alloy Wheel Hub Based on Gray Relational Analysis

Zhang,

Lan,

Ding

et al. 2024

Materials

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To study the influencing factors of process parameters on the wall thickness deviation and internal warpage deviation of the workpiece in magnesium alloy wheel hub spin molding, a two-pass heterogeneous spin molding model is proposed. To ensure the accuracy of the simulation results, the stress–strain data of AZ31 magnesium alloy at different temperatures and different strain rates were obtained through tests. Wall thickness deviation and internal warp deviation after molding were used as evaluation indexes of workpiece molding quality. ABAQUS software facilitated the numerical simulation and analysis of the magnesium alloy wheel hub spinning process. Gray relational degree analysis optimized the first-pass process parameters, elucidating the impact of the axial offset, the thinning ratio, and the feed ratio on forming quality. The application of optimized parameters in the hub spinning simulation resulted in a substantial 28.84% reduction in wall thickness deviation and a 4.88% reduction in inner diameter deviation. This study underscores the efficacy of employing Gray Relational Analysis for comprehensive parameter optimization, ensuring wheel hub quality. Moreover, it provides a theoretical foundation for enterprises to expedite research and development cycles and minimize associated costs.

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“…Flow forming is an active research area both in academic and industrial point of view. In this context, several works have been published so far focusing on Al alloys [5], Mg alloys [6], Ti alloys [7] and steels. Beside experimental works concerning the relationship between input parameters of the flow forming, and final microstructure and mechanical properties of the flow formed alloys, numerical modelling coupled with the experiments was also made.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and microstructural properties of AISI 4140 after flow-forming process

YAZGAN

2023

Materials Research Proceedings

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Abstract. Flow-forming is a cold deformation process to form dimensionally precise and rotationally symmetrical parts. Strain hardening effect of the flow forming process, and possibility of producing cylindrical part are the advantages especially for aerospace industry. The purpose of this study is to investigate the effect of initial microstructure of an AISI 4140 steel on the microstructure and mechanical properties after being flow formed by 70% as the reduction ratio in the thickness direction. In this context, as-received steel was heat treated to standard quenched and tempered condition, and an additional annealing was also performed. Before and after the flow forming process, the microstructure was examined, hardness and tensile tests were conducted. The results revealed that the additional annealing was beneficial to obtain a crack free material after the flow forming process of a heat treated material.

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Deformation mechanism of ZK61 magnesium alloy cylindrical parts with longitudinal inner ribs during hot backward flow forming

Cited by 31 publications

References 38 publications

Simulation and optimization of parameters for rotary extrusion of magnesium alloy barrel with inner ring rib based on response surface method

Simulation and optimization of parameters for rotary extrusion of magnesium alloy barrel with inner ring rib based on response surface method

On optimization of Spin-Forming Process Parameters for Magnesium Alloy Wheel Hub Based on Gray Relational Analysis

Mechanical and microstructural properties of AISI 4140 after flow-forming process

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