The Effect of Casting Speed on Microstructure, Microsegregation, and Mechanical Properties of High-Strength Mg-Nd-Zn-Zr Alloy

Zheng, Xingwei; Luo, Peng; Dong, Jie; Wang, Shiming

doi:10.1007/s11665-019-3878-0

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…Zheng et al [ 65 , 100 ] and Imran et al [ 101 ] studied deformation instability characteristics of Mg alloy and TC4 alloy under hot stretching conditions, respectively. The thermal processing diagram is shown in Figure 8 a; the MgNdZnZr alloy is unstable in a range of 200–300 °C and 0.02~1 s −1 .…”

Section: Deformation Instability Induced By Characteristics Of Materialsmentioning

confidence: 99%

Theory, Method and Practice of Metal Deformation Instability: A Review

Wan

Yao

et al. 2023

Materials

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Deformation instability is a macroscopic and microscopic phenomenon of non-uniformity and unstable deformation of materials under stress loading conditions, and it is affected by the intrinsic characteristics of materials, the structural geometry of materials, stress state and environmental conditions. Whether deformation instability is positive and constructive or negative and destructive, it objectively affects daily life at all times and the deformation instability based on metal-bearing analysis in engineering design has always been the focus of attention. Currently, the literature on deformation instability in review papers mainly focuses on the theoretical analysis of deformation instability (instability criteria). However, there are a limited number of papers that comprehensively classify and review the subject from the perspectives of material characteristic response, geometric structure response, analysis method and engineering application. Therefore, this paper aims to provide a comprehensive review of the existing literature on metal deformation instability, covering its fundamental principles, analytical methods, and engineering practices. The phenomenon and definition of deformation instability, the principle and viewpoint of deformation instability, the theoretical analysis, experimental research and simulation calculation of deformation instability, and the engineering application and prospect of deformation instability are described. This will provide a reference for metal bearing analysis and deformation instability design according to material deformation instability, structural deformation instability and localization conditions of deformation instability, etc. From the perspective of practical engineering applications, regarding the key problems in researching deformation instability, using reverse thinking to deduce and analyze the characteristics of deformation instability is the main trend of future research.

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Section: Deformation Instability Induced By Characteristics Of Materialsmentioning

confidence: 99%

Theory, Method and Practice of Metal Deformation Instability: A Review

Wan

Yao

et al. 2023

Materials

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“…The quality of the manufactured bars is determined not only by the production technology, but by the property of the initial continuously cast billet (ICCB). Research conducted by scientists in many countries shows that the processes occurring in the mold have a significant influence on the formation of the cast structure of the ICCB [6][7][8][9]. Moreover, the development of physical and chemical heterogeneity is significantly affected by the distribution of temperatures in the melt, by the intensity and direction of heat removal, and by the development of diffusion redistribution of impurities, etc.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Identification of regularities of changes in energy-power parameters depending on the design of the roller node of a new radial-shear mill by computer simulation

Mashekov

Nurtazayev

Mashekova

et al. 2020

EEJET

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This paper proposes a radial-shear mill (RSM) of a new design, which allows by rolling or rolling and pressing operations obtaining high-quality rods and wires. In addition, it proposes the method of computer calculation of the energy-power parameters of bar extrusion at the RSM of the new design. Mathematical dependences and calculation algorithm were described, which allow calculating energy-power parameters of the combined bar manufacturing process at a given level of technological parameters. Based on the results of analytical studies and computer modeling, the energy-power parameters were defined and analyzed, in addition, the laws of their changes were determined. It is shown that, regardless of the alloy grade or type, when rolling billets on a new RSM with smooth rolls, the strain force is larger in magnitude compared to rolling in helical rolls. It was found that, in comparison with rolling of bars in smooth and helical rolls, their processing by a combined rollingpressing process leads to an increase in the deformation force of alloys M1 and D16 by 1.1-1.15 and 1.15-1.3 times, respectively. It is shown that during the deformation of the rods on the new RSM, by controlling the paths of the metal flow in the deformation zone, intensive grinding of the metal structure can be achieved. It was found that when pressing the bars on the new RSM, the temperature of the workpiece increases up to 420 °С, which leads to a sharp decrease in the force required for deformation. The nature of the temperature distribution of the pressed metal in the deformation zone was determined. The adequacy of the models was proved by comparing calculated values of the power parameters of extrusion, obtained by engineering technique and numerical simulation

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