Finite Element Analysis of the Deformation Distribution During Multi-Pass Rotary-Die ECAP

Yuan, Yuxuan; Ma, A. B.; Jiang, Jinghua; Yang, Donghui

doi:10.1007/s11665-011-0042-x

Cited by 15 publications

(3 citation statements)

References 28 publications

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“…Thereafter, a home-made rotary-die ECAP (RD-ECAP) was employed on these samples at 573 K for 6 passes, followed by quickly cooling in water. The operation principle of RD-ECAP can be found in the supplementary material and our earlier work [20,21]. Prior to RD-ECAP, the sample and die were held at 573 K for 15 min together.…”

Section: Methodsmentioning

confidence: 99%

Multimodal Microstructure and Mechanical Properties of AZ91 Mg Alloy Prepared by Equal Channel Angular Pressing plus Aging

Yang

Liu

et al. 2018

Metals

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Developing cost-effective magnesium alloys with high strength and good ductility is a long-standing challenge for lightweight metals. Here we present a multimodal grain structured AZ91 Mg alloy with both high strength and good ductility, prepared through a combined processing route of low-pass ECAP with short-time aging. This multimodal grain structure consisted of coarse grains and fine grains modified by heterogeneous precipitates, which resulted from incomplete dynamic recrystallization. This novel microstructure manifested in both superior high strength (tensile strength of 360 MPa) and good ductility (elongation of 21.2%). The high strength was mainly attributed to the synergistic effect of grain refinement, back-stress strengthening, and precipitation strengthening. The favorable ductility, meanwhile, was ascribed to the grain refinement and multimodal grain structure. We believe that our microstructure control strategy could be applicable to magnesium alloys which exhibit obvious precipitation strengthening potential.

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Section: Methodsmentioning

confidence: 99%

Multimodal Microstructure and Mechanical Properties of AZ91 Mg Alloy Prepared by Equal Channel Angular Pressing plus Aging

Yang

Liu

et al. 2018

Metals

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“…The as-cast AZ91 alloy was firstly cut into billets with dimension of 20 mm × 20 mm × 45 mm. The rotary-die (RD) ECAP device [19,20] which had two crossed channels with a square section at 90 • was adopted for ECAP. Before ECAP processing, the sample was firstly solution heat-treated (SHT) at 430 • C for 20 h and quenched in water to the room-temperature.…”

Section: Methodsmentioning

confidence: 99%

High Mechanical Properties of AZ91 Mg Alloy Processed by Equal Channel Angular Pressing and Rolling

Yuan

Guo

Sun

et al. 2019

Metals

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Mechanical properties usually take precedence for wrought magnesium alloy when it would be used as a structure material. This paper proposed an approach that achieved high strength in AZ91 Mg alloy. The main procedure combined solution heat treatment, equal channel angular pressing (ECAP), and the subsequent low temperature rolling. After solution heat treatment and ECAP, the alloy had fine grains and excellent ductility, which benefited the following rolling at low temperature. By the following rolling (at 150 °C), the strength was further increased to ~432 MPa with a moderate ductility. This approach was proved effective in refining the grains and accumulating dislocations. The ultrahigh strength was attributed to the high density of dislocations and fine structure. The uniformly distributed fine precipitates also supplied precipitate hardening. Recrystallization that happened during rolling and annealing was the main reason for the moderate ductility.

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“…ECAP has been analyzed by different methods including analytical modeling of material flow, upper-bound analysis, and FEM simulation [11]. Wherein, FEM is one of the common numerical methods that have been used to explain the deformation process during the ECAP processes [12][13].…”

Section: Introductionmentioning

confidence: 99%

Effects of Inner Corner Angle on Strain Distribution of ECAPed Aluminum Alloy

Chen

Shi

2013

AMR

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Ultrafine-grained materials have excellent mechanical properties, which include the high strength and toughness. Equal channel angular pressing (ECAP) is one kind of severe plastic deformation method to make ultrafine-grained metals. The ECAP processes are simulated by finite element method (FEM) in this work. The effects of inner corner angle on strain distribution during the deformation process are numerically analyzed. The evolutions of effective strain on three points of different deformation are compared. The results show that the deformation becomes severe on each point when the inner corner angle is less than 90o, which is different from the situation when the inner corner angle is equal to or greater than 90o. The results are useful for improving the ECAP process to make the structure of metals homogenous.

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Finite Element Analysis of the Deformation Distribution During Multi-Pass Rotary-Die ECAP

Cited by 15 publications

References 28 publications

Multimodal Microstructure and Mechanical Properties of AZ91 Mg Alloy Prepared by Equal Channel Angular Pressing plus Aging

Multimodal Microstructure and Mechanical Properties of AZ91 Mg Alloy Prepared by Equal Channel Angular Pressing plus Aging

High Mechanical Properties of AZ91 Mg Alloy Processed by Equal Channel Angular Pressing and Rolling

Effects of Inner Corner Angle on Strain Distribution of ECAPed Aluminum Alloy

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