An analysis for magnesium alloy curvature products formed by staggered extrusion (SE) based on the upper bound method

Zhang, Xi Jie; Li, Feng; Wang, Ye; Chen, Zi Yu

doi:10.1007/s00170-021-08167-z

Cited by 6 publications

(1 citation statement)

References 25 publications

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“…In recent years, researchers have proposed a plethora of innovative processing technologies for magnesium alloy materials, including traditional drawing, stamping, expansion, and rolling techniques [9] . Meanwhile, significant progress has been made in new methods of magnesium alloy design and new technologies for plastic processing, forming important achievements such as new asymmetric processing technologies [10], reciprocating upsetting-extrusion [11], extrusion forging composite forming technology [12], asynchronous rolling [13], lining plate rolling [14], thick plate lateral rolling [15], continuous bending deformation [16], curved extrusion profiles [17][18][19], and sideways extrusion [20,21] etc, providing important scientific basis and technical support for the further development and application of magnesium alloy plastic processing technology.…”

Section: Introductionmentioning

confidence: 99%

Study on damage and cracking of Mg-Gd-Y-Ag-Zr alloys during rolling based on experimental and finite element method

Ning,

Wang,

et al. 2023

Mater. Res. Express

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Edge cracking, a common issue encountered during the rolling of magnesium alloys, holds substantial importance in determining the success of subsequent finishing processes. It serves as a pivotal parameter for evaluating the formability of rolled plates. In this particular investigation, researchers concentrated on understanding the behavior of edge cracks within the solid solution magnesium alloy designated as Mg-10Gd-3Y-2Ag-0.4Zr (expressed in weight percentage as GWQ1032K). To support this analysis, one delved into the thermal rheological characteristics of the magnesium alloy and established a mathematical relationship connecting rheological stress, strain rate, and temperature. This served as the foundation for a constitutive model tailored to the alloy. Furthermore, practical rolling experiments were conducted to examine how reductions in thickness influenced the morphology of edge cracks in rolled plates. The study also explored shifts in stress–strain behavior and microstructural changes during the deformation process. The results highlighted the substantial impact of compression levels on the magnesium alloy’s anisotropic behavior, subsequently influencing the shape of the resultant plate and the stress–strain characteristics observed during deformation. Significantly, as the rolling reduction increased, a notable increase in heat generation due to the plastic deformation of the magnesium alloy plate was observed. This heightened heat played a key role in dynamic recrystallizationand and facilitating the formation of the brittle Mg5(RE, Ag) phase. Consequently, minimizing the generation of this brittle phase emerged as a critical factor in effectively managing and controlling edge cracks in the rolling process.

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