An Experimental Study of Cryogenic Machining on Nanocrystalline Surface Layer Generation
An Experimental Study of Cryogenic Machining on Nanocrystalline Surface Layer Generation
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DOI：
10.1016/j.procir.2014.04.029
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Florian Ambrosy;F. Zanger;V. Schulze;I. Jawahir
中科院分区：
文献类型：
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作者：
Florian Ambrosy;F. Zanger;V. Schulze;I. Jawahir
本文分析了液氮冷却对加工过程中纳米晶工件（AISI 4140）表面层形成的影响。来自低温加工的样品证明了具有有益性能的非晶态晶粒细化，例如，良好的耐磨性。建立了工艺参数和几何参数、冷却条件、切削力和表面层状态之间的相关性。研究了冷却状态、切削深度和切削刃半径等参数，并利用聚焦离子束系统、原子力显微镜和纳米压痕仪对切削力进行了测量，对微/纳米结构表面层状况进行了详细的分析。结果表明，所获得的微/纳米结构强烈依赖于冷却条件。特别地，受影响的深度受到冷却状态的影响。
This paper presents an analysis of in-process liquid nitrogen cryogenic cooling on the generation of nanocrystalline workpiece(AISI4140)surface layer in machining. Samplesfrom cryogenic machining demonstratenanocrystalline grain refinement withbeneficial properties, e.g., favorable wear characteristics. Correlations are established among process and geometry parameters, cooling conditions, cutting forces and surface layer states. Parameters studied are cooling state, depth of cuthand cutting edge radiusrß.Cutting forces are measured and a detailed analysis of micro/nano-structural surface layer conditions wascarried out using Focused Ion Beam system, Atomic Force Microscopy and Nanoindentation. It is shown that the obtained micro/nano-structure strongly depends on the cooling conditions. In particular, the affected depth is influenced by the cooling state.