Ultraprecision laser-assisted diamond machining of single crystal Ge

Shahinian, Hossein; Kang, Di; Navare, Jayesh; Bodlapati, Charan; Zaytsev, Dmytro; Ravindra, Deepak

doi:10.1016/j.precisioneng.2020.04.020

Cited by 23 publications

(7 citation statements)

References 15 publications

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“…Conversely, the In-LAC method has gained widespread usage because it circumvents the disadvantages described above. Micro-LAM Co. developed a commercial OPTIMUS T1 system [20,[84][85][86]. The OPTIMUS T1 system, as shown in figure 5(c), has been successful in achieving the optical machining of silicon with a surface roughness of 1.05 nm in Ra [87].…”

Section: Types Of Lacmentioning

confidence: 99%

Field-assisted machining of difficult-to-machine materials

Zhang,

Zheng,

Huang

et al. 2024

Int. J. Extrem. Manuf.

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Difficult-to-machine materials (DMMs) are extensively applied in critical fields such as aviation, national defense, biomedicine, and other key fields due to their excellent material properties. However, traditional machining technology is difficult to precisely machine DMMs due to poor surface quality and low processing efficiency. In recent years, as a new generation of machining technology, field-assisted machining (FAM) technology based on innovative principles such as laser heating, tool vibration, magnetic magnetization, and plasma modification provides a new solution for improving the machinability of DMMs. It is advantageous to prevent the shortcomings of traditional machining methods, and has become a hot topic of research in the domain of ultra-precision machining of DMMs. Many new methods and principles have been presented and investigated one after another, yet few researches have been analysed and summarized from a comprehensive standpoint. To fill this gap and understand the development trend of FAM, this study provides an important overview of FAM, covering different assisted machining methods, application effects, mechanism analysis, and equipment design. The current deficiencies and future challenges of FAM are summarized to lay the foundation for the further development of multi-field hybrid assisted and intelligent field-assisted machining technologies.

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Section: Types Of Lacmentioning

confidence: 99%

Field-assisted machining of difficult-to-machine materials

Zhang,

Zheng,

Huang

et al. 2024

Int. J. Extrem. Manuf.

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“…During In-LAC, the material below the cutting edge is heated by a focused laser beam with a spot diameter of micrometers through the transparent diamond tool, thus minimizing the heat affected zone and energy consumption with ideal machining accuracy [151,152]. Previous experimental studies have demonstrated that the ultra-smooth surface of hard brittle materials such as germanium, binderless tungsten carbide and silicon can be achieved with a significant increase in their critical DOCs by using In-LAC technique [153][154][155][156]. Recently, the cutting mechanisms of hard brittle materials in laser-assisted diamond cutting have been widely studied through simulation methods.…”

Section: Thermal-assisted Diamond Cuttingmentioning

confidence: 99%

Numerical simulation of materials-oriented ultra-precision diamond cutting: review and outlook

Zhao

Zhang

et al. 2023

Int. J. Extrem. Manuf.

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Ultra-precision diamond cutting is a promising machining technique for realizing ultra-smooth surface of different kinds of materials. While fundamental understanding of the impact of workpiece material properties on cutting mechanisms is crucial for promoting the capability of the machining technique, numerical simulation methods at different length and time scales act as important supplements to experimental investigations. In this work, we present a compact review on recent advancements in the numerical simulations of material-oriented diamond cutting, in which representative machining phenomena are systematically summarized and discussed by multiscale simulations such as molecular dynamics simulation and finite element simulation: the anisotropy cutting behavior of polycrystalline material, the thermos-mechanical coupling tool-chip friction states, the synergetic cutting responses of individual phase in composite materials, and the impact of various external energetic fields on cutting processes. In particular, the novel physics-based numerical models, which involve the high precision constitutive law associated with heterogeneous deformation behavior, the thermo-mechanical coupling algorithm associated with tool-chip friction, the configurations of individual phases in line with real microstructural characteristics of composite materials, and the integration of external energetic fields into cutting models, are highlighted. Finally, insights into the future development of advanced numerical simulation techniques for diamond cutting of advanced structured materials are also provided. The aspects reported in this review present guidelines for the numerical simulations of ultra-precision mechanical machining responses for a variety of materials.

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“…The assembly holding the LDOS comprises of micrometers that allow the alignment of laser beam with respect to the tool edge. The µ-LAM process has proved to enhance the cutting performance of IR materials like Silicon, Ge and ZnS [19][20][21]. Machining of single-crystal Si samples using the µ-LAM process exhibited little to no brittle fracture on the surface and the potential of extending the diamond tooling life by 150% [19].…”

Section: Previous Workmentioning

confidence: 99%

“…Machining germanium using the µ-LAM process produced lower post machining residual stresses on the surface relative to conventional diamond turning. [20].…”

Section: Previous Workmentioning

confidence: 99%

Cutting performance of laser assisted diamond turning of calcium fluoride with different crystal orientations

Bodlapati¹,

Kang²,

Navare³

et al. 2021

Appl. Opt.

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In this paper single point diamond turning (SPDT) of single crystal CaF 2 using µ-LAM process is studied. The paper focuses on how crystal orientation of the workpiece can influence tool wear and e ciency of the cutting process. Cutting experiments were performed on single crystal CaF 2 with <100>, <111> and <211> crystal orientations. The tool failed at the smallest cutting distance for <111> crystal orientation whereas the tool failure on <100> orientation occurred at the longest cutting length. Tool life for cutting the <211> and <111> crystal orientations was found to be 92% and 67% to that of tool life during cutting <100> orientation. To explain the results obtained, an anisotropic model based on schmid's law was used. It is shown that an inverse correlation between the resistance to plastic deformation and maximum cutting distance without inducing any brittle fracture can be established.

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Ultraprecision laser-assisted diamond machining of single crystal Ge

Cited by 23 publications

References 15 publications

Field-assisted machining of difficult-to-machine materials

Field-assisted machining of difficult-to-machine materials

Numerical simulation of materials-oriented ultra-precision diamond cutting: review and outlook

Cutting performance of laser assisted diamond turning of calcium fluoride with different crystal orientations

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