Analysis of the milli-forming of single-crystal and poly-crystal bar

Kim, Y.I; Sim, K.-S.; Yoh, Eun-Gu; Lee, Y.S; Park, H.J; Na, K.H

doi:10.1016/s0924-0136(01)00683-5

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…For the investigation of the influence of miniaturization on friction, N. Tiesler et al have carried out the scaled DCE tests, and find that friction coefficient increases distinctly with miniaturization when extrusion oil was applied for lubrication but it has no remarkable change when solid lubricants is used instead of a fluid. The changes of monocrystal and polycrystal material texture in the micro-extrusion process have been analyzed by Y. I. Kim [8]. To investigate the grain size leading to the problem of size effect, M.Geiger has conducted a cup-rod compound Extrusion experiment, and the results show that the grain size of the micro-extrusion part influents not only the size and shape accuracy of the extruded Part but also its mechanical property [9].…”

Section: Development In Microforming Processmentioning

confidence: 99%

“…(7) Optimum parameters of warm micro-extrusion are obtained combined with numerical simulation, and their correctness and rationality are verified by forming experiment. (8) The relationship between material characteristic and forming ability and the characteristics of resistance to deformation, deformation, friction and lubrication are investigated combined with experimental analysis of micro vision-plasticity and numerical simulation.…”

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confidence: 99%

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Investigation into the Warm Extrusion for Micropart with Laser-Aided Heating Method

Wang

Dong

et al. 2008

MSF

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The rapid market need of MEMS (Micro Electromechanical System) and metal microparts are increasing gradually. The plastic microforming has received more interests and applications in MEMS because it ensures high precision and manufacturing efficiency. However, it raises the higher demand on the microforming and plastic processing technology. Here we present one new process to micro-extrude microparts with laser-aided heating method. The new process is to selectively heat the workpiece with the laser radiation method to the suitable temperature that is between room temperature and recrystallization temperature, and to extrude the workpiece. This process is characterized by decreasing the influence of strain strengthening and lowering the resistance to deformation, and increasing the uniformity of material flow. The key elements of the approach concerning the warm micro-extrusion and temperature control, such as process parameters, laser heating system, micro-extrusion die structure, have been advanced. Furthermore, an important aspect of the research is that the developed system and theory of micro warm extrusion based on laser heating can be explored for further investigation and understanding of plastic microforming.

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Section: Development In Microforming Processmentioning

confidence: 99%

mentioning

confidence: 99%

Investigation into the Warm Extrusion for Micropart with Laser-Aided Heating Method

Wang

Dong

et al. 2008

MSF

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Finite element modelling and simulation of bulk material forming

Mackerle

2006

Engineering Computations

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Purpose -To provide a selective bibliography for researchers working with bulk material forming (specifically the forging, rolling, extrusion and drawing processes) with sources which can help them to be up-to-date. Design/methodology/approach -A range of published (1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005) works, which aims to provide theoretical as well as practical information on the material processing namely bulk material forming. Bulk deformation processes used in practice change the shape of the workpiece by plastic deformations under forces applied by tools and dies. Findings -Provides information about each source, indicating what can be found there. Listed references contain journal papers, conference proceedings and theses/dissertations on the subject. Research limitations/implications -It is an exhaustive list of papers (1,693 references are listed) but some papers may be omitted. The emphasis is to present papers written in English language. Sheet material forming processes are not included. Practical implications -A very useful source of information for theoretical and practical researchers in computational material forming as well as in academia or for those who have recently obtained a position in this field. Originality/value -There are not many bibliographies published in this field of engineering. This paper offers help to experts and individuals interested in computational analyses and simulations of material forming processes.

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State of Micro-Forming Technology Development

2002

Transactions of Materials Processing

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Analysis of the milli-forming of single-crystal and poly-crystal bar

Cited by 3 publications

References 8 publications

Investigation into the Warm Extrusion for Micropart with Laser-Aided Heating Method

Investigation into the Warm Extrusion for Micropart with Laser-Aided Heating Method

Finite element modelling and simulation of bulk material forming

State of Micro-Forming Technology Development

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