• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.81-81
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• 2004

등통로각압축(ECAP, Equal Channel Angular Pressing)공정은 다결정의 재료 덩어리를 두 채널(channel)이 일정하게 교차하는 형태의 금형에 통과시켜 단면적과 단면 형상의 큰 변화 없이 압출하는 성형법으로 다른 공정에 비해 상대적으로 낮은 압력으로 재료에 소성변형을 발생시켜 입자를 미세화 시킬 수 있으며, 기존의 분말야금에 의한 방법에 비해 상용재료를 포함한 광범위한 금속 및 합금에 적용이 용이한 점과 재료 내부에 기포가 거의 잔류하지 않는 점등의 장점을 가지고 있다.(중략)

• Transactions of the Korean Society of Mechanical Engineers A
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• v.30 no.7 s.250
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• pp.765-772
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• 2006

Much research efforts have been made on the equal channel angular pressing (ECAP) which produces ultra-fine grains. Along with the experiments, the finite element method has been widely employed to investigate the deformation behavior of specimen during ECAP and the effect of process parameters of ECAP. In this paper, sectional shape change has been investigated during ECAP with the pure-Zr, Zr-702 by using three-dimensional finite element analysis. The results have been compared with experimental results.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.661-665
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• 2002

A lot of investigations have been made in recent years on the equal channel angular pressing (ECAP) which produces ultra-fine grains. The finite element method has been used to investigate this issue. In this paper, pure-Zirconium is considered far ECAP process by three dimensional finite element analysis. The effects of fiction on the deformation behavior have been investigated and compared with two dimensional finite element analysis.

• Journal of the Korean Society for Precision Engineering
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• v.19 no.8
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• pp.187-193
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• 2002

Much research efforts have been made on the equal channel angular pressing (ECAP) which produces ultra-fine grains. Among many process parameters such as channel angles, frictions, die deformations and materials employed, the effects of material properties on the deformation behavior have been investigated. The finite element method has been used to investigate this issue.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.9
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• pp.1539-1545
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• 2003

A lot of researches have been performed on the equal channel angular pressing (ECAP) which produces ultra-fine grains. Along with the experiments, the finite element method has been widely employed to investigate the deformation behavior of specimen during ECAP and the effects of process parameters of ECAP. In this paper, pure-Zirconium is considered for ECAP process by using three-dimensional finite element analysis. The results have been compared with those of previous two-dimensional analysis and with the experimental results

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.827-832
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• 2001

A lot of investigations have been made in recent years on the equal channel angular pressing(ECAP) which produces ultra-fine grains(UFG). Among many process parameters such as channel angles, frictions, die deformations and materials employed, the effects of material properties on the deformation behavior have been investigated. The finite element method(FEM) has been used to investigate this issue.

• Proceedings of the KSME Conference
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• 2005.11a
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• pp.117.1-117.1
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• 2005

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.877-881
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• 2002

Much research efforts have been made on the equal channel angular pressing(ECAP) which produces ultra-fine grains. In this paper the ECAP processes with Zr-702 alloy at elevated temperature and at room temperature are considered. Both two-dimensional and three-dimensional finite element analyses have been employed to investigate the deformation behaviors of specimen during ECAP process.

• Proceedings of the KSME Conference
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• 2003.04a
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• pp.531-536
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• 2003

Equal channel angular pressing (ECAP) has been employed to produce materials with ultra-fine grains that have high strength and high corrosion resistance properties. In order to obtain super plastic deformation during ECAP, multipass angular pressing is frequently employed. In this paper, three-dimensional finite element analyses have been performed to investigate the deformation behavior of pure-Zr specimen and the effects of process parameters for equal channel multi-angular pressing (ECMAP) process. The results have been compared with some experimental results

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.11a
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• pp.409-412
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• 2000

Much research efforts have been made on the structure and properties of metals deformed to severe plastic deformation (SPD). Being deformed to SPD, ultra-fine grains (UFG) are usually formed, and UFG structure exhibits fundamental differences in original physical properties. One method often used to obtain SPD is equal channel angular pressing (ECAP). In order for this technique to be exploited, it is important to understand the deformation behavior during the ECAP processing with respect to friction. The finite element method (FEM) has been used to investigate this issue.